Optimize Network Security Projects on Upwork

I'm seeking an experienced professional to guide me through a web security challenge for my course.

The challenge involves:
- Finding weaknesses to gain system access via backdoors and weak points.

I need assistance with:
- Testing the challenge safely, step by step.

Ideal skills and experience:
- Strong background in web security and penetration testing
- Experience with vulnerability assessment and exploitation
- Ability to explain complex concepts clearly and guide through practical steps

Looking forward to your expertise!

Skills: Web Security, Technical Writing, Website Testing, Internet Security, Penetration Testing, Network Security, Risk Assessment, Security Auditing

I need a sample penetration test for a assessment review. You can perform this on your network and provide a clean no security issues.

I have a desktop application that runs on windows desktop and I need a penetration test done that shows network infrastructure penetration test report covering internal and external network boundaries, firewalls, routers, and switches.

I will provide the name of my application for the penetration test. The results should show no outstanding security issues.

Deliverable
• A complete report (PDF or DOC) from a real or anonymised engagement you performed.
• Front section with scope, methodology, key risks, and high-level recommendations written for executives.
• All branding or client-identifying data stripped out.

Skills: Web Security, Computer Security, Network Administration, Internet Security, Penetration Testing, Network Security, Risk Assessment, Network Monitoring, Incident Response, Security Auditing

We’re looking for an infrastructure specialist to design and implement a practical environment for coordinating LinkedIn operations across 100 profiles, with potential to grow to 500+.

We provide the profiles and business workflows. Profile creation, sourcing and recovery of restricted LinkedIn accounts are outside your scope.

Your responsibility is the technical environment: hosting, browser workspaces, access management, network security and central monitoring.

Please propose a concrete architecture covering:

1. Hosting and operating system
Would you recommend cloud-hosted machines, local infrastructure or a hybrid setup? Explain the Windows/Linux options, resource requirements and estimated costs.

2. Browsers and sessions
How many browser workspaces or instances would be required? How would sessions, account data and operator access be organised? Explain initial login, session expiry, re-authentication and when profile-owner involvement is necessary.

3. Network connectivity
Would VPNs or proxies be necessary for authorised remote access, or would standard secure connectivity be sufficient? Explain their purpose, limitations and costs. Distinguish network security requirements from the location shown on a LinkedIn profile.

4. Security and responsibilities
How would credentials, permissions and two-factor authentication be handled? Clearly separate infrastructure support from actions that must be performed by profile owners.

5. Central management
How would we see which profiles are accessible, which sessions need attention and whether the infrastructure is working? What would the day-to-day operating process look like?

6. Scale and costs
Provide an architecture and cost breakdown for 100, 250 and 500 profiles: hosting, browser/workspace software, network services, implementation and maintenance.

7. Pilot and handover
Propose a small pilot to validate the environment before rollout. Define deliverables, acceptance criteria, timeline and fixed pilot price. Include documentation and handover so our team can operate the system.

Please describe a comparable environment you have implemented, its scale and your personal contribution. Be explicit about platform limitations and dependencies; do not promise restriction-free accounts.

We need a technical infrastructure specialist, not a lead-generation agency, outreach manager or profile supplier.

The experimental part of this thesis involves setting up a virtual NSA 5G cybersecurity laboratory, simulating controlled cyberattacks, and evaluating intrusion-detection systems and machine-learning models. The task must cover framework architecture, threat modelling, risk scoring, detection architecture, mitigation, and security assurance.

I received this email and need help resolving. Our website using WordPress and is hosted by Digital Ocean.

Subject: URGENT: Critical PHP Vulnerabilities - Action Required

We're reaching out regarding two critical remote code execution (RCE) vulnerabilities in PHP.

What's Going On
We're reaching out regarding two critical remote code execution (RCE) vulnerabilities in PHP, tracked as XX, publicly disclosed on October 21, 2026. These vulnerabilities allow an attacker to execute arbitrary code on servers running PHP, potentially resulting in full compromise of the affected system. Because PHP powers a significant share of the web, including WordPress, Drupal, Laravel, and custom applications, we are notifying all DigitalOcean customers to ensure your awareness on both DigitalOcean deployed assets and as a general awareness notification.

Who Is Affected
These vulnerabilities affect every PHP version from PHP 5 onward. If you run PHP anywhere in your DigitalOcean infrastructure - on Droplets, in DOKS workloads, in App Platform apps or custom containers, or via Marketplace 1-Click images (WordPress, LAMP, LEMP, Laravel, etc.) - you should consider yourself potentially in scope until patched. The DigitalOcean Marketplace team is currently in the process of suspending affected images until they are patched. If you have previously deployed a marketplace image with PHP, please login and update immediately.

The patched versions of PHP are:
• 8.5.12
• 8.4.27
• 8.3.36
• 8.2.35
Importantly, patches are only available for currently supported PHP versions (8.2 and later). If you are running an end-of-life PHP version (8.1 or earlier), no official patch will be available and you should plan an immediate upgrade to a supported version.

What You Should Do Now
1. Inventory every system running PHP across your infrastructure, including bundled installs you may not think of as "PHP servers" (WordPress and other CMS instances, admin panels, legacy apps).
2. Patch immediately. Patches for PHP are available. If you run software such as Wordpress, Laravel, or other tools built with PHP, you may need software-specific patches directly from those providers. Updating PHP to a patched version is the only safe choice; there are no complete mitigations and proof-of-concept exploit code is publicly available.
3. If you are on PHP 8.1 or earlier, upgrade to PHP 8.2+ so you can apply the patch. EOL versions will not receive patches.
4. If you cannot update immediately, the PHP Foundation has provided measures you can take to reduce exposure to specific attack paths. This does not make your installation of PHP safe, and you should have a plan to update as soon as possible.
5. Reduce exposure in the interim where practical: restrict public access to PHP applications that don't need to be internet-facing, and ensure firewalls/WAF rules and monitoring are in place.
Please take immediate action to help secure your environment. Our support team is available if you have any questions. To protect our broader community and network integrity, DigitalOcean may temporarily restrict traffic to resources showing signs of compromise. We encourage you to patch immediately to ensure your services remain online and unaffected.

I need an Asterisk engineer who can jump on AnyDesk and finish configuring our on-premise PBX. The box is already running Linux with FreePBX; what’s missing is the detailed setup and testing.

Hardware & lines
• Digium/Sangoma PRI card handling a single E1 span that carries both of our business numbers.
• No SIP trunks—everything rides on the E1.

Scope of work
1. Verify the existing OS/FreePBX install, apply any critical updates, and make sure DAHDI sees the card cleanly.
2. Program the span, clocks, signalling, and channels so inbound and outbound calls flow for the two listed DIDs.
3. Create nine laptop SIP extensions and four Android SIP extensions, all on a static LAN.
4. Implement caller-ID presentation, simple IVR or direct routing to extensions, and internal dial plans.
5. Turn on full-time call recording (inbound and outbound) and ensure CDR logging is accurate.
6. Assign a static public IP and verify NAT/firewall rules so softphones work off-site if required.
7. Walk through test calls, record sample audio, export CDR, and hand over admin credentials with a quick rundown of what was changed.

I can power-cycle the server, swap cables, or check LEDs on request; everything else must be done remotely. Let me know your fixed price and how quickly you can deliver a fully working, documented system.

Skills: Linux, Android, Asterisk PBX, VoIP, Network Security, SIP, Firewall, System Administration

We are looking for an experienced RDP specialist to set up, manage, and troubleshoot secure remote desktop environments. The ideal candidate should have strong knowledge of Windows Server, Remote Desktop Services (RDS), and network security.

Key Responsibilities:

1- Set up and maintain RDP environments.
2- Manage Windows Server and Remote Desktop Services.
3- Troubleshoot remote access and connectivity issues.
4- Manage user accounts, permissions, and Active Directory.
5- Configure VPNs, firewalls, and security policies.
6- Monitor server performance and ensure reliable connections.
7- Provide technical support and maintain system security.

Requirements:

Proven experience in RDP or Windows Server administration.
Strong knowledge of Remote Desktop Services.
Hands-on experience configuring, securing, and troubleshooting RDP environments in production.
Experience with VPNs, firewalls, and network security.
Knowledge of Active Directory and user management.
Strong troubleshooting and communication skills.

Preferred Qualifications:

Experience with Azure Remote Desktop or Virtual Desktop Infrastructure (VDI)
Previous remote/Upwork work experience with good client feedback

Role Overview
We are looking for a Network Architecture Engineer to design, build, and scale our enterprise network infrastructure across traditional on-premises data centers and multi-cloud environments (AWS, Azure, and/or GCP). You will bridge legacy hardware and modern cloud-native architectures, ensuring high availability, security-by-design, and seamless hybrid connectivity.

Key Responsibilities
1. Hybrid & Cloud Network Architecture
• Design and implement enterprise cloud connectivity strategies, including AWS Direct Connect, Azure ExpressRoute, Site-to-Site VPNs, and BGP routing.
• Architect secure Virtual Private Clouds (VPCs), transit gateways, subnets, and hybrid DNS architectures (e.g., Amazon Route 53, Azure DNS).
• Build resilient multi-region and multi-AZ failover designs, load balancing, and traffic management solutions (F5, Cloud Load Balancers).
2. On-Premises & Data Center Engineering
• Manage and modernize core on-premises networking infrastructure, including enterprise routers, switches, and firewalls (Cisco, Palo Alto, Arista, Juniper).
• Maintain and upgrade data center and campus fabrics (BGP, OSPF, VXLAN/EVPN, MPLS).
• Oversee network lifecycle management, end-of-life hardware remediation, and technical debt reduction.
3. Security, Zero Trust & Compliance
• Implement Zero Trust Network Access (ZTNA), network segmentation, micro-segmentation, and identity-aware access controls.
• Configure next-generation firewalls (NGFW), IDS/IPS, Network Access Control (NAC), and cloud-native security tools (AWS Network Firewall, Security Groups/NACLs).
• Ensure network compliance with corporate and regulatory frameworks (e.g., ISO 27001, SOC 2, HIPAA/PCI).
4. Infrastructure as Code (IaC) & Automation
• Develop and maintain network automation frameworks using Terraform, Ansible, Python, or AWS CDK.
• Treat network configurations as code (GitOps workflows) to streamline deployments and reduce manual configuration drift.
• Build network monitoring, observability, and telemetry dashboards (VPC Flow Logs, SNMP, Datadog, Prometheus).
________________________________________
Required Qualifications & Experience
• Education: Bachelor’s degree in Computer Science, Information Technology, or a related field (or equivalent practical experience).
• Experience:
o 8+ to 12+ years of total experience in network engineering and enterprise architecture.
o Proven track record designing and managing hybrid enterprise networks combining on-prem data centers with public cloud.
• Technical Skills:
o Protocols & Standards: TCP/IP, BGP, OSPF, IPSec, VXLAN, DNS, DHCP, IPv4/IPv6.
o Hardware & Vendors: Cisco (Catalyst, Nexus, ASR), Palo Alto Networks, Fortinet, F5.
o Cloud Platforms: AWS and/or Microsoft Azure.
o Scripting/Automation: Python, Bash, Terraform.
• Certifications (Preferred):
o Cisco Certified Internetwork Expert (CCIE) or CCNP
o AWS Certified Solutions Architect (Professional) or Microsoft Azure Solutions Architect Expert
o PCNSE or equivalent security certification.
________________________________________
Soft Skills & Collaboration
• Strong documentation and network diagramming abilities (Visio, Lucidchart).
• Ability to mentor junior engineers and partner closely with security, DevOps, and application teams.
• Calm and structured approach during critical production network incidents.

Note: 1. This is a freelance role.
2. Working hours as per EST time zone of United States.
3. Should be able to join the meeting calls with the client, prior notice of the meeting will be provided.

Checking logs about hidden illegal MDM on iPhone, MacBook, android phone. Detection of Pegasus NSO group software. Prevention MITM attack. Healing devices.
Preparing Adguard with blocks of all mdm domains.
Preparing documented evidence of cyberattack.

Skills: Java, Mobile App Development, iPhone, Android, Security, Mobile Development, Network Security, Forensic Consulting, Incident Response, Malware Removal

We need a freelance network engineer or small-business IT consultant to help set up remote access for a healthcare practice. The work includes configuring and supporting OpenVPN, CloudConnexa, and Windows Server, with a focus on reliable routing and stable remote connectivity securely. This is a one time task with a potential to part-time, ongoing role for someone who can troubleshoot issues, improve network reliability, and keep remote access running smoothly.

I'm looking for someone who can help me hack into a Wi-Fi network using Linux and Ubuntu. it's my project but I need someone to help me

Skills: Linux, Computer Security, Ubuntu, Network Administration, Internet Security, Penetration Testing, Network Security, Security Auditing

Our office Wi-Fi has started acting up: devices drop off at random and new ones fail to obtain an IP address. From everything I can see, the problem is rooted in configuration errors somewhere between the access points, DHCP settings and firewall rules. I need someone who lives and breathes network troubleshooting to step in remotely, examine the current wireless setup, spot the mis-configurations, then implement and document a clean, stable fix.

You’ll have secure remote access to the controller, individual APs, the gateway firewall and the Windows server that handles DNS/DHCP. Feel free to leverage any standard diagnostic tools—packet captures, spectrum analysis, controller logs—whatever helps you zero in on the fault quickly.

Deliverables
• Identify the exact configuration errors affecting wireless connectivity
• Apply a corrected configuration and verify stable performance (no drops for at least two hours of continuous load testing)
• Provide a brief report outlining root cause, changes made and any recommendations for future upkeep

Once the network holds steady, I’ll confirm everything on my end and sign off. If you need any additional information—topology diagrams, firmware versions, or specific log exports—just let me know and I’ll get them to you right away.

Skills: System Admin, Computer Security, Cisco, Network Administration, Network Engineering, Wireless Site Survey, Wireless Network Security Analysis, Wireless Network Risk Analysis & Reduction

We are seeking a hands-on Principal PKI and Cryptographic Architect who can not only design the overall architecture but also actively build, configure, and deliver the core cryptographic foundation.
​This rollout covers an on-premise, multi-tier Public Key Infrastructure across datacenter infrastructure, Kubernetes clusters, and branch locations. While an internal engineer will handle baseline OS provisioning, network plumbing, and routine fleet scripting, this role owns the end-to-end design, direct technical implementation, and production sign-off for the critical cryptographic components.
​What You Will Deliver:
​Author and deliver production-ready Certificate Policy and Certification Practice Statement (CP/CPS) documentation and technical certificate profiles.
​Design resilient validation paths (CRL and OCSP) to prevent branch outages across distributed enterprise networks.
​Personally conduct and execute the offline Root CA generation ceremony, establishing custodian procedures and secure key custody protocols.
​Hands-on installation, configuration, and integration of on-premise Hardware Security Modules with our CA engines using standard cryptographic interfaces.
​Hands-on build and configuration of an external on-premise HashiCorp Vault cluster as our Workload CA, integrating it directly with Kubernetes cert-manager for automated pod mutual TLS.
​Partner with our internal systems engineer to test and validate Active Directory Certificate Services auto-enrollment, 802.1X, and disaster recovery runbooks.


​Requirements:
​Demonstrated experience directly delivering and deploying on-premise enterprise PKI environments from ground zero.
​Hands-on execution experience with Hardware Security Modules and formal offline root key ceremonies.
​Deep practical engineering expertise with HashiCorp Vault PKI engine, Kubernetes cert-manager, and container workload encryption.
​Strong knowledge of Microsoft AD CS, Kerberos, directory services, and standard device enrollment protocols.
​Track record of delivering complete, production-grade technical runbooks and architecture documentation.


​How to Apply:
In your proposal, please provide specific examples or summaries of enterprise PKI implementations you have personally architected and delivered. Sanitized architecture diagrams, past key ceremony procedures, or runbook outlines that demonstrate your hands-on delivery experience are strongly encouraged.

Skills: Cryptography, OpenSSL, Scripting, Kubernetes, Cloud Security, Technical Documentation, DevOps, Network Security, Automation, Security Auditing

We need an expert to secure mobile devices, recover lost data, and protect sensitive information. The work includes assessing device vulnerabilities, implementing security measures, retrieving data from damaged or locked devices, and ensuring privacy during recovery. You should be able to handle both Android and iOS devices and provide clear guidance on securing mobile data. This is a part-time role for someone with strong technical skills and experience in mobile security and data recovery.

Location: Itanagar, India
We are looking for an L1 Engineer to support the below onsite activity:
Scope of Work:
• RACK & STACK, in business hours or in out of hours
• Upon arriving on site, the FE will have to connect on Teams (we will send invitation once FE name is known)
• Customer’s engineer and end customer from France will be connected and welcome the FE. Customer Engineer will help FE and “drive” him during the operation
• Equipment (Fortinet Fortigate FW) are directly delivered by customer on end customer local site
• Install rack tray and FW following customer’s instructions
• Plug cables following customer’s instructions
• Power on the devices, upload the configuration using the USB key method (may not be required)
• Wait until customer’s engineer get remote access to the FW (Fortigate)
• Proceed with the acceptance tests following customer’s instructions
• If acceptance tests ok, rollback following customer’s instructions and tests.
• Take pictures and upload them on Teams
BOM to be installed: 1 or 2 Fortinet devices, FG-70G or FG-50G

Skills: System Admin, Linux, Cisco, Technical Support, Network Administration, Installation, Network Security, Network Engineering

I'm looking for an experienced Network Engineer or Cybersecurity professional to deliver a 3-month training program covering networking and network security fundamentals. My goal is to be job-ready and interview-ready for real IT and cybersecurity roles, so I need clear, step-by-step explanations of every concept — not just what a technology is, but how it works, why it's used, and how to apply it on the job. The program should cover networking essentials (OSI/TCP-IP models, protocols, IP addressing, subnetting, routing, switching, DNS, DHCP), security fundamentals (firewalls, VPNs, IDS/IPS, NAT, common attacks and defenses), and practical skills including essential commands, troubleshooting techniques, and hands-on labs using tools like Packet Tracer, Wireshark, and Nmap. I also want real workplace scenarios woven in — such as handling "network down" tickets, securing wireless networks, and explaining technical issues to non-technical stakeholders — plus mock interview questions to prepare me for technical interviews. The ideal candidate has current real-world experience (not just textbook knowledge), strong communication skills, and the ability to provide a structured syllabus for the 12 weeks. To apply, please share a brief outline of how you'd structure the program, your relevant experience, your rate (hourly or fixed for 3 months), and your availability for a quick intro call.

About the Role
We are seeking a talented and creative Graphic Designer to join our team. This role offers an exciting opportunity to bring visual concepts to life and contribute to the development of compelling designs that support our brand and business goals.

As a Graphic Designer, you will collaborate with cross-functional teams to create engaging visuals for digital and print media, ensuring consistency and quality across all projects.

Responsibilities
Develop and design creative assets for marketing campaigns, social media, websites, and print materials.
Collaborate with marketing, product, and content teams to understand project requirements and deliver effective design solutions.
Create visual concepts that align with brand guidelines and enhance user experience.
Manage multiple projects simultaneously while meeting deadlines and maintaining high-quality standards.
Prepare and optimize graphics for various platforms and formats.
Stay current with design trends, tools, and best practices to continuously improve creative output.
Review final designs for accuracy and quality before publication or production.
Requirements
Bachelor’s degree in Graphic Design, Visual Arts, or a related field, or equivalent experience.
Proven experience as a Graphic Designer or in a similar role.
Proficiency in design software such as Adobe Creative Suite (Photoshop, Illustrator, InDesign).
Strong understanding of typography, color theory, and layout principles.
Experience with both digital and print design projects.
Excellent communication skills and ability to work collaboratively in a team environment.
Attention to detail and a strong eye for aesthetics and visual details.
Ability to manage multiple projects and meet deadlines in a fast-paced environment.
Qualifications
Portfolio showcasing a range of design projects and creative solutions.
Familiarity with UI/UX principles is a plus.
Basic knowledge of video editing or animation tools is advantageous.
Experience working with brand guidelines and maintaining brand consistency.
Benefits
Competitive salary and performance-based bonuses.
Comprehensive health, dental, and vision insurance plans.
Flexible work hours and remote work options.
Opportunities for professional development and training.
Collaborative and inclusive work environment.
Access to the latest design tools and resources.

Skills: Troubleshooting, Technical Support, Helpdesk, Security, Computer Repair, Technical Documentation, Network Security, System Administration

About the Role
We are seeking a skilled and motivated Software Developer to join our dynamic team. This role offers an exciting opportunity to design, develop, and maintain innovative software solutions that drive our business forward. If you enjoy solving complex problems and collaborating in a fast-paced environment, this position is for you.

As a Software Developer, you will play a key role in delivering high-quality applications that meet user needs and business goals. Your expertise will contribute to the entire software development lifecycle, from concept to deployment and support.

Responsibilities
Design, develop, test, and maintain software applications following best practices and coding standards.
Collaborate with cross-functional teams including product managers, designers, and QA engineers to deliver robust solutions.
Participate in code reviews to ensure code quality and share knowledge within the team.
Identify and troubleshoot software defects and performance issues.
Contribute to continuous improvement by suggesting new technologies and development processes.
Write clear documentation for code, features, and technical processes.
Stay current with industry trends and emerging technologies to enhance development practices.
Requirements
Bachelor’s degree in Computer Science, Software Engineering, or a related field, or equivalent practical experience.
Proven experience in software development using languages such as Java, C#, Python, or JavaScript.
Strong understanding of object-oriented programming and software design principles.
Experience with version control systems like Git.
Familiarity with databases and SQL.
Ability to work effectively both independently and as part of a team.
Excellent problem-solving skills and attention to detail.
Good communication skills and ability to articulate technical concepts clearly.
Preferred Qualifications
Experience with cloud platforms such as AWS, Azure, or Google Cloud.
Knowledge of Agile development methodologies.
Familiarity with containerization tools like Docker and orchestration with Kubernetes.
Understanding of DevOps practices and CI/CD pipelines.
Benefits
Competitive salary and performance-based bonuses.
Comprehensive health, dental, and vision insurance.
Flexible work hours and remote work options.
Professional development opportunities and training programs.
Collaborative and inclusive work environment.
Paid time off and holidays.

Skills: Troubleshooting, Technical Support, Helpdesk, Security, Computer Repair, Technical Documentation, Network Security, System Administration

Senior Penetration Tester – Melbourne Onsite Security Assessment

Location: Melbourne, Victoria, Australia
Engagement: Short-term, fixed-price subcontracting opportunity
Estimated onsite duration: 3–5 working days, subject to final scope
Proposed period: November–December 2026

Project Overview
An Australian-based cybersecurity and technology consulting firm is seeking an experienced Melbourne-based penetration tester or specialist cybersecurity professional for a prospective short-term subcontracting engagement.
The engagement involves authorised security testing within an enterprise environment, with an emphasis on identifying exploitable vulnerabilities, assessing security risks and providing actionable remediation recommendations.

Scope of Work

The proposed activities may include:

• Internal infrastructure and network penetration testing
• Enterprise wireless/Wi-Fi security assessments
• External infrastructure and web application penetration testing, subject to agreed scope
• Manual vulnerability identification, validation and risk assessment
• Professional technical reporting, including evidence-based findings and remediation recommendations
• Remediation verification or retesting, where agreed

The estimated 3–5 onsite working days represent a preliminary allowance. Final testing coverage, reporting requirements and deliverables will be established before contract award.

Contractor Requirements

1. Physically based in Melbourne or able to attend the engagement location for all required onsite testing
2. Demonstrated professional penetration-testing experience
3. Relevant cybersecurity certifications and professional accreditations
4. Experience assessing enterprise infrastructure, internal networks and wireless environments
5. Ability to conduct testing independently within an authorised scope and agreed rules of engagement
6. Strong technical documentation and professional reporting skills
7. Willingness to undertake a subcontracted engagement, subject to applicable client requirements
8. Applicants must hold or be willing to obtain a satisfactory Australian National Police Check (NPC) before commencing onsite work, subject to client security requirements.
Information Required from Applicants
Please include the following in your proposal:
1. Your current location and availability for onsite work in Melbourne during November–December 2026.
2. Your relevant professional qualifications, certifications and accreditations.
3. A summary of comparable penetration-testing engagements you have completed.
4. Examples of sanitised technical reports, where available.
5. Your proposed fixed-price quotation in AUD for 3–5 onsite testing days, with reporting costs separately itemised.
6. Confirmation of what is included in your proposed fixed-price quotation, including testing activities, deliverables and any additional expenses.
7. Your retesting charges, if applicable, and whether any retesting is included in your quotation.
8. Any assumptions, exclusions or limitations affecting your proposal.

Engagement Conditions

This is a prospective project-based engagement, subject to project confirmation and mutual agreement.

The selected contractor will be required to work within an agreed and authorised testing scope. Detailed technical requirements will be provided to shortlisted candidates under appropriate confidentiality arrangements.

Only applicants with genuine penetration-testing experience and the ability to undertake the required onsite activities should apply.

Skills: Web Security, Computer Security, Report Writing, Penetration Testing, Network Security, Wireless Network Security Analysis, Certified Ethical Hacking, Risk Assessment, Security Auditing, Vulnerability Remediation

I need an ethical hacker to review my electronic devices for potential compromises. The work includes assessing device security, identifying vulnerabilities, and providing clear recommendations for improving protection. I’m looking for someone who can explain findings in an easy-to-understand way and help me take practical steps to secure my devices. Please share relevant experience and examples of similar work.

About the Role
We are seeking a dedicated IT Support Specialist to join our team and play a vital role in maintaining and enhancing our technology infrastructure. This position offers an exciting opportunity to provide hands-on technical support, troubleshoot issues, and ensure seamless IT operations across the organization.

If you have a passion for technology and a commitment to delivering exceptional service, this role will allow you to make a meaningful impact while working in a collaborative and dynamic environment.

Key Objectives
Deliver timely and effective technical support to end-users.
Maintain and troubleshoot hardware, software, and network systems.
Ensure IT infrastructure reliability and security.
Collaborate with cross-functional teams to support business technology needs.
Responsibilities
Respond promptly to IT support requests via phone, email, or ticketing system.
Diagnose and resolve hardware, software, and network issues.
Install, configure, and maintain computer systems, peripherals, and software applications.
Assist with user account management, including access permissions and password resets.
Perform routine system maintenance, updates, and backups.
Document technical procedures and maintain knowledge base articles.
Collaborate with IT team members to implement new technologies and upgrades.
Ensure compliance with company IT policies and security protocols.
Provide training and guidance to end-users on technology best practices.
Requirements
Associate’s or Bachelor’s degree in Information Technology, Computer Science, or related field preferred.
Proven experience in IT support or a similar technical role.
Strong knowledge of Windows and macOS operating systems.
Familiarity with networking concepts, including TCP/IP, DNS, and VPN.
Experience with common productivity software and troubleshooting tools.
Excellent problem-solving skills and attention to detail.
Effective communication skills with the ability to explain technical information clearly.
Ability to work independently and as part of a team in a fast-paced environment.
Relevant certifications (e.g., CompTIA A+, Microsoft Certified Professional) are a plus.
Benefits
Competitive salary and performance-based incentives.
Comprehensive health, dental, and vision insurance plans.
Opportunities for professional development and certification support.
Collaborative work environment with a focus on innovation.
Paid time off and flexible work arrangements.
Access to the latest technology and tools.

Skills: Troubleshooting, Technical Support, Helpdesk, Security, Computer Repair, Technical Documentation, Network Security, System Administration

We are seeking a Security Operations Center Analyst to triage security alerts generated from our SIEM (Sentinel).
Triage alerts as false positives or react to true positives by resetting user passwords or isolating computer accounts in Microsoft Defender for Endpoint.
Escalate incidents to customers using our Service Desk Software.

The technologies that the person will be working with include Microsoft Sentinel, the entire suite of Microsoft 365 Defender products, and potentially Microsoft Defender for Cloud.

Candidates for this role should be familiar with attack vectors, cyberthreats, incident management, and Kusto Query Language (KQL).

Must Have:
Prior experience working in a Security Operating Center
Above Average English Language - Verbal and Written
A laptop with a fast and stable Internet Connection


Nice to Have:
Security Certifications: SC-200, AZ-500

We are hiring for the following (Weekend) shifts, as well as the opportunity for a floating analyst:

1st Shift (12 AM PST to 8 AM PST)

An AWS Cloud Architect designs and governs secure, scalable, and reliable AWS cloud environments. The role defines cloud architecture standards, leads AWS architecture reviews to validate designs against security, reliability, performance, scalability, and cost best practices, implements Infrastructure as Code and automation, supports PCI DSS and other compliance requirements, optimizes cloud performance and costs, and partners with VizyPay IT and Product teams to ensure cloud solutions align with business and technology goals.

I have several devices—Macs, iPhones, iPads, Windows laptops, and a few Android phones—that may have been compromised. My highest priorities are:

• ruling out sophisticated spyware such as Pegasus or any unknown monitoring apps
• uncovering hidden MDM profiles, unauthorized proxies, or other concealed configuration changes
• detecting any man-in-the-middle activity that could be altering network traffic or even changing AI-generated answers

Your first task will be to work with me remotely. I’ll share whatever live logs, configuration screenshots, or packet captures you specify. Once you have a clear action plan, I’d like you to come to Bangkok (or send a trusted local engineer) to validate findings in person, image the devices, and harden them on-site.

Deliverables
1. For each Apple, Windows, and Android device:
• a forensic image or encrypted backup that I can retain
• a concise report detailing indicators of compromise, network anomalies, and any remediation performed
2. A traffic-analysis summary, preferably sourced from tools such as Wireshark, Zeek, or similar, highlighting any MITM attempts.
3. Deployment of a small cloud-based AI/IDS stack—your choice of Elastic Stack, Wazuh, CrowdStrike Falcon, or another comparable platform—that will continuously log traffic, flag MITM patterns, and alert me when responses from chat-based AI services appear manipulated.
4. A brief hand-off session (recorded) so I know how to review logs, rotate keys, and keep the system updated.

Acceptance Criteria
• No residual spyware signatures on any device (verified by up-to-date YARA rules and vendor-specific scanners).
• All hidden MDM or unmanaged profiles removed or fully documented.
• Continuous monitoring in the cloud is demonstrably catching test MITM attempts.
• All deliverables supplied in encrypted archives with verified hashes.

If you bring experience with mobile forensics suites like Cellebrite, desktop tools like iMazing, and network platforms such as Splunk or Elastic, you’ll fit perfectly. I’m ready to start as soon as you can outline your approach and timeline.

Skills: Computer Security, Technical Writing, Network Administration, Internet Security, Splunk, Network Security, Digital Forensics, Incident Response

I have strong evidence that several of my devices—Pixel 11, Pixel 10, an iPhone, and two MacBooks—are running a Pegasus-class implant. Unknown device-management entries and configuration profiles keep re-appearing, and a Tempest-style MITM attack is even forcing my AI tools to return falsified answers. I can open each settings page for you in a live remote screen-share so you can look at every toggle, certificate, and profile in real time.

Your task is to spot and document every anomaly: hidden MDM hooks, unsigned configuration profiles, clandestine root certificates, persistence daemons, network redirections, or obfuscated payloads. I also need deep parsing of raw system logs (logcat, ADB bugreport, iOS sysdiagnose, macOS unified logs) and packet captures to trace how the attacker maintains command-and-control.

Deliverables
• A step-by-step forensic report for each device, including indicator lists and timestamps
• Screenshots or extracted log snippets that prove the compromise paths
• A clear remediation plan I can follow immediately
• Recommendations for hardening so this class of attack cannot re-establish

If you already work with tools such as Wireshark, Burp Suite, Cellebrite, XRY, or custom Python-based parsers for Pegasus-style exploits, you should feel at home on this engagement. Confidentiality is paramount; I will sign any mutual NDA you require before we begin.

Skills: Python, Mac OS, Objective C, Data Analysis, Network Security, Digital Forensics, Incident Response, Security Auditing

PC, Android ve iOS platformları için geliştirdiğimiz, gerçek zamanlı çok oyunculu bir MMORPG projesi için deneyimli bir Senior Multiplayer / Game Developer arıyoruz.

Projemiz geliştirme sürecinin ileri aşamasındadır. Temel oyun sistemlerinin büyük bölümü tamamlanmış ve 60'tan fazla fonksiyonel test senaryosu başarıyla sonuçlandırılmıştır.

Sıfırdan oyun geliştirilmesini istemiyoruz.

Mevcut kaynak kodlarını analiz ederek multiplayer sistemini tamamlayabilecek, bütün kritik hataları giderebilecek, mobil ve sunucu performansını optimize edebilecek ve oyunumuzu ticari lansmana hazırlayabilecek bir geliştirici arıyoruz.

Aradığımız kişinin geliştirme, hata giderme, optimizasyon ve test süreçlerinin tamamını üstlenebilmesi gerekmektedir.

1. Multiplayer Geliştirme

Mevcut multiplayer mimarisinin incelenmesi, tamamlanması ve iyileştirilmesi.

Client-server iletişiminin ve gerçek zamanlı senkronizasyonun optimize edilmesi.

Oyuncu hareketleri, savaşlar, animasyonlar, yetenekler ve etkileşimlerin senkronizasyonu.

Ağ trafiği, paket işleme, gecikme ve bant genişliği optimizasyonu.

Multiplayer hatalarının, bağlantı kopmalarının ve senkronizasyon sorunlarının giderilmesi.

Güvenilir yeniden bağlanma mekanizmalarının geliştirilmesi.

PC ve mobil istemcilerin aynı multiplayer altyapısıyla sorunsuz çalışmasının sağlanması.

Sunucu taraflı doğrulama, güvenlik ve eşzamanlı işlem problemlerinin çözülmesi.

2. Bug Fixing ve Sistem Kararlılığı

Mevcut projenin kapsamlı şekilde incelenmesi, hataların belirlenmesi ve giderilmesi beklenmektedir.

Oynanış, multiplayer ve sunucu kaynaklı hataların düzeltilmesi.

Crash, donma, bellek sızıntısı ve performans problemlerinin giderilmesi.

Envanter, karakter, ekipman, ticaret ve oyun içi sistemlerin kontrol edilmesi.

Veritabanı kayıt ve senkronizasyon problemlerinin çözülmesi.

Item duplication, veri kaybı ve işlem tutarsızlıklarının engellenmesi.

PvP, PvE, NPC, yetenek ve karakter gelişimi sistemlerinin test edilmesi.

Mevcut 60+ test senaryosunun kontrol edilmesi ve gerekli regresyon testlerinin uygulanması.

Tespit edilen hatalar kayıt altına alınmalı, önceliklendirilmeli, giderilmeli ve yeniden test edilmelidir.

3. Mobil ve PC Optimizasyonu

Oyunumuzun Android, iOS ve PC platformlarında yüksek performansla ve düşük kaynak tüketimiyle çalışması hedeflenmektedir.

CPU, GPU ve RAM kullanımının analiz edilmesi.

Rendering, animasyon, efekt ve oyun varlıklarının optimize edilmesi.

FPS düşüşlerinin, takılmaların ve bellek sorunlarının giderilmesi.

Mobil cihazlarda multiplayer performansının artırılması.

Harita yükleme, geçiş ve oyun açılış sürelerinin iyileştirilmesi.

Dokunmatik kontrollerin tepki süresinin optimize edilmesi.

Farklı donanım seviyelerindeki Android ve iOS cihazlarda performans testleri yapılması.

Yoğun oyuncu ortamlarında mobil performansın korunması.

4. Sunucu Performansı ve Ölçeklenebilirlik

En önemli hedeflerimizden biri, yüksek eşzamanlı oyuncu sayısına dayanıklı bir sunucu altyapısı oluşturmaktır.

Beklentilerimiz:

Mevcut sunucu mimarisinin teknik analizi.

CPU, RAM, ağ ve veritabanı darboğazlarının tespiti.

Sunucu kaynak tüketiminin ve bağlantı yönetiminin optimize edilmesi.

Kalabalık haritaların, yoğun PvP savaşlarının ve NPC işlemlerinin optimize edilmesi.

Veritabanı sorgularının ve eşzamanlı işlemlerin iyileştirilmesi.

Ticaret, envanter ve oyun ekonomisi sistemlerinin güvenilirliğinin sağlanması.

Performans izleme, loglama ve hata analiz altyapısının kurulması.

Sunucunun daha yüksek oyuncu sayılarına ölçeklenebilmesi için gerekli geliştirmelerin yapılması.

5. Otomatik Yük Testleri ve Stres Testleri

Bu bölüm projemiz için kritik bir gereksinimdir.

Yalnızca fonksiyonel testler değil, gerçek oyuncu davranışlarını simüle eden kapsamlı yük ve stres testleri yapılmasını istiyoruz.

Geliştiricinin otomatik bir multiplayer test sistemi oluşturması beklenmektedir.

Test hedefleri:

500 eşzamanlı sanal oyuncu.

1.000 eşzamanlı sanal oyuncu.

2.000 eşzamanlı sanal oyuncu.

Altyapının elverdiği ölçüde 3.000–5.000 oyuncuya kadar kademeli stres testleri.

Test botları yalnızca sunucuya bağlanmamalı; gerçek oyuncu işlemlerini de simüle etmelidir.

Örnek işlemler:

Oyuna giriş, çıkış ve yeniden bağlanma.

Haritalar arası hareket.

Canavar kesme ve PvP savaşları.

Yetenek kullanımı ve NPC etkileşimleri.

Envanter ve eşya işlemleri.

Oyuncular arası ticaret.

Pazar açma, ürün listeleme ve satın alma.

Eşya geliştirme ve oyun içi ekonomi işlemleri.

Uzun süreli dayanıklılık testleri de yapılmalıdır. Özellikle bellek sızıntıları, sunucu çökmeleri, gecikmeler ve veritabanı tutarsızlıkları kontrol edilmelidir.

Testlerin sonunda CPU/RAM kullanımı, gecikme süreleri, hata oranları, bağlantı kopmaları ve sunucu kararlılığını gösteren raporlar hazırlanmalıdır.

Amacımız yalnızca binlerce bağlantı kurmak değil, yoğun oyuncu trafiği altında gerçek oynanışın sorunsuz devam ettiğini doğrulamaktır.

6. Güvenlik ve Oyun Ekonomisi

Oyunumuzda sanal para, oyuncular arası ticaret, pazar ve oyun içi mağaza sistemleri bulunmaktadır.

Bu nedenle aşağıdaki alanların detaylı şekilde test edilmesini istiyoruz:

Item duplication açıklarının önlenmesi.

Eşzamanlı alım satım işlemlerinin güvenli yönetimi.

Envanter ve veritabanı tutarlılığı.

Oyun içi para bakiyelerinin doğru hesaplanması.

Bağlantı kopması ve sunucu kesintisi sırasında veri kaybının önlenmesi.

Yetkisiz eşya veya para oluşturulmasının engellenmesi.

İşlem kayıtlarının tutulması ve güvenilirliğinin sağlanması.

7. Test ve Nihai Teslimat

Geliştiriciden aşağıdaki çıktıların teslim edilmesi beklenmektedir:

Teknik analiz ve geliştirme planı.

Tamamlanmış ve kararlı multiplayer sistemi.

Kritik ve yüksek öncelikli hataların giderilmesi.

Optimize edilmiş mobil istemci ve sunucu altyapısı.

Otomatik yük testi araçları ve kaynak kodları.

Fonksiyonel, entegrasyon, regresyon ve stres testi sonuçları.

Performans ölçümleri ve optimizasyon raporları.

Güncel kaynak kodları ve teknik dokümantasyon.

Lansman öncesi son sistem kontrolü ve üretim ortamına geçiş desteği.

Tüm geliştirmeler şirketimizin kontrolündeki özel kaynak kodu deposunda yürütülecek ve geliştirilen kodlar, test araçları ve dokümantasyon eksiksiz teslim edilecektir.

8. Aranan Deneyim

Multiplayer ve MMORPG geliştirme tecrübesi.

Gerçek zamanlı client-server ağ mimarisi.

Yüksek oyuncu sayılı oyun sunucularının optimizasyonu.

Android ve iOS oyun performans optimizasyonu.

Mevcut kod altyapılarında hata giderme ve geliştirme.

Veritabanı ve eşzamanlı işlem yönetimi.

Otomatik yük ve stres testi geliştirme.

Ticari oyunların lansman ve üretim süreçlerinde deneyim.

Daha önce ticari olarak yayımlanmış MMORPG veya büyük ölçekli multiplayer projelerde çalışmış adaylar öncelikli değerlendirilecektir.

9. Çalışma Şekli

Projenin kalan teknik süreçlerini uçtan uca üstlenebilecek, bağımsız çalışabilen ve sorunlara kalıcı çözümler üretebilen kıdemli bir geliştirici arıyoruz.

Düzenli iletişim, temiz kod, performans iyileştirmelerinin ölçülebilir olması ve eksiksiz teknik teslimat bizim için önemlidir.

Başarılı iş birliği sonrasında uzun vadeli geliştirme, bakım ve teknik destek çalışmaları için devam etme imkânı bulunmaktadır.

Projenin detayları ve kaynak kodları yalnızca ön değerlendirmeyi geçen adaylarla, gerekli gizlilik anlaşmaları sonrasında paylaşılacaktır.

10. Başvuru İçin

Lütfen teklifinizde aşağıdaki bilgileri paylaşınız:

Daha önce çalıştığınız MMORPG veya multiplayer projeleri.

Yüksek eşzamanlı oyuncu kapasitesindeki tecrübeleriniz.

Geliştirdiğiniz otomatik yük testi veya bot sistemleri.

Android/iOS optimizasyon deneyiminiz.

Mevcut bir MMORPG projesini tamamlamak için önerdiğiniz teknik yaklaşım.

Çalışmaya uygunluk durumunuz ve ücret beklentiniz.

Yalnızca multiplayer, sunucu optimizasyonu ve ileri düzey oyun geliştirme alanlarında gerçek deneyimi bulunan adayların başvurmasını rica ediyoruz.

Hedefimiz, mevcut MMORPG projemizi ticari lansman için kararlı, yüksek performanslı, güvenilir ve profesyonel şekilde test edilmiş bir oyun haline getirmektir.

Skills: Mobile App Development, C++ Programming, Game Development, Network Administration, Server, Unreal Engine, Network Security, Database Management, API Development, Game Programming

We are looking for an experienced VoIP Engineer for a long-term, monthly Upwork contract to install, configure, manage, and troubleshoot our VoIP infrastructure.

Key Responsibilities:

Install and configure ViciBox, VICIdial, Asterisk, and VOS3000.
Configure inbound and outbound calling infrastructure.
Set up SIP trunks, carriers, DIDs, and call routing.
Integrate VICIdial with VOS3000 and external SIP providers.
Troubleshoot SIP, RTP, call quality, and connectivity issues.
Optimize infrastructure for high-volume concurrent calls.
Provide ongoing server maintenance, monitoring, and technical support.

Requirements:

5+ years of hands-on VoIP experience.
Strong expertise in VICIdial, ViciBox, VOS3000, and Asterisk.
Experience with Linux server administration and SIP protocols.
Proven experience deploying production VoIP systems.
Contract Type: Monthly / Long-Term

To Apply: Please share your relevant experience, previous VoIP deployments, monthly rate, and availability.

Important: We need a hands-on engineer who can independently install, configure, and maintain the complete infrastructure, not just provide consultation.

Location: India
We are looking for an L1 Engineer to support the below onsite activity:
Scope of Work:
• RACK & STACK, in business hours or in out of hours
• Upon arriving on site, the FE will have to connect on Teams (we will send invitation once FE name is known)
• Customer’s engineer and end customer from France will be connected and welcome the FE. Customer Engineer will help FE and “drive” him during the operation
• Equipment (Fortinet Fortigate FW) are directly delivered by customer on end customer local site
• Install rack tray and FW following customer’s instructions
• Plug cables following customer’s instructions
• Power on the devices, upload the configuration using the USB key method (may not be required)
• Wait until customer’s engineer get remote access to the FW (Fortigate)
• Proceed with the acceptance tests following customer’s instructions
• If acceptance tests ok, rollback following customer’s instructions and tests.
• Take pictures and upload them on Teams

Skills: System Admin, Cisco, Technical Support, VoIP, Customer Service, Network Administration, Installation, Technical Documentation, Network Security, Network Engineering

I need assistance recovering my compromised Free Fire account through official recovery channels. Please explain your process, confirm your total fixed price, and provide an estimated timeline. Please also clarify your refund policy if the recovery is unsuccessful.

Location: Paris, France, Indonesia & Germany
We are looking for an L1 Engineer to support the below onsite activity:
Scope of Work:
• Rack & Stack of Cisco network devices.
• Provide console access to the Remote Engineer (RE).
• Follow the instructions provided by the Remote Engineer during the activity.
Target Rate: USD 45/hour start from USD 35/hour
Travel: No travel charges applicable.
Schedule: The activity date and time will be confirmed shortly.
Please confirm your availability and acceptance of the above rate.

Skills: System Admin, Linux, Troubleshooting, Cisco, Technical Support, Network Administration, Installation, Network Security, Network Engineering, System Administration

Location: Paris, France, Indonesia & Germany
We are looking for an L1 Engineer to support the below onsite activity:
Scope of Work:
• Rack & Stack of Cisco network devices.
• Provide console access to the Remote Engineer (RE).
• Follow the instructions provided by the Remote Engineer during the activity.
Target Rate: USD 45/hour start from USD 35/hour
Travel: No travel charges applicable.
Schedule: The activity date and time will be confirmed shortly.
Please confirm your availability and acceptance of the above rate.

Skills: Troubleshooting, Cisco, Technical Support, Network Administration, Technical Documentation, Network Security, Network Engineering, IT Project Management, Network Monitoring, System Administration