Find Blockchain Projects with Vollna

I’m looking to have a lightweight, web-based crypto wallet built with Bitcoin support at its core. The immediate objective is to give users a secure interface where they can create an account, view their balance, and track every incoming or outgoing transaction in a clear, filterable history log.

Scope of work
• Set up the back-end logic to generate and manage Bitcoin addresses, private keys, and balances.
• Build a clean front-end dashboard (responsive) that shows real-time balance updates and detailed transaction history.
• Implement standard security practices—encrypted key storage, HTTPS everywhere, and CSRF protection.

Tech stack is flexible, though I’m comfortable signing off on Node.js + React or a comparable modern framework. If you have an existing open-source codebase you can adapt, let me know.

Future-ready extras like two-factor authentication or multi-currency support are on my roadmap, so structuring the code for easy expansion will be a plus—please keep that in mind when choosing libraries and setting up the database schema.

Deliverables
1. Source code in a private repo.
2. Deployment instructions (Docker or straightforward server setup).
3. Brief walkthrough showing key workflows: wallet creation, sending/receiving BTC, and the transaction history view.

I’d like to see examples of any blockchain or fintech projects you’ve shipped before. Once we agree on scope and timeline, I’m ready to get started right away.

Skills: PHP, JavaScript, Web Security, HTML, Node.js, React.js, Blockchain, Web Development, API Development, Cryptocurrency

Overview:

We are a U.S.-based transfer agent exploring the possibility of offering tokenized securities to our clients.

Our goal is straightforward: we want to understand what it would take to build and operate our own internal tokenization platform. We are not looking to build a brokerage, exchange, trading platform, cryptocurrency, NFT marketplace, or DeFi application. Our focus is on enabling the issuance and maintenance of tokenized representations of securities while continuing to perform our role as the transfer agent and official registrar of ownership.

We are aware that white-label tokenization providers exist. However, this engagement is focused on evaluating what would be required if we chose to develop this capability internally.

Project Objectives:

We are looking for an experienced consultant to help us answer questions such as:

- What would a minimum viable tokenization platform for a transfer agent look like?
- What system components would need to be developed?
- Which blockchain(s) and token standards would be most appropriate?
- What development team would be required?
- How long would development likely take?
- What would the estimated development and ongoing maintenance costs be?
- What technical and operational challenges should we expect?
- What regulatory considerations should influence the platform's design?

Scope of Work:

The selected consultant will:

- Learn about our transfer agent business and objectives.
- Define the core capabilities required for an internal tokenization platform.
- Recommend an appropriate technical architecture.
- Identify the blockchain networks and token standards best suited for regulated securities.
- Estimate development effort, staffing requirements, timeline, and budget.
- Identify third-party infrastructure or services that would still be required (if any).
- Highlight key technical, security, operational, and compliance considerations.
- Deliver a written report with recommendations and participate in a review meeting to discuss the findings.

Preferred Qualifications:

We're seeking someone with practical experience in one or more of the following:

- Security tokens
- Real-world asset (RWA) tokenization
- Digital securities
- Blockchain solution architecture
- Smart contracts
- Capital markets technology
- Financial infrastructure
- Transfer agents, custodians, or securities operations

Experience limited to cryptocurrency trading, NFT projects, meme coins, or DeFi applications is not sufficient for this engagement.

I need a developer to help build a TRON DApp for Trust Wallet, focusing on contract approval. I have all the necessary files but am experiencing bugs that need to be resolved. The ideal candidate will have experience in TRON DApp development and be able to debug and optimize the existing code.

Summary
We're looking for 1–2 experienced Blockchain Developers with strong solidity skills to join our Web3 team for RWA projects invested by US clients.

Requirements:
* Strong experience with Solidity and smart contract development
* Experience with EVM-compatible blockchains
* Knowledge of Web3.js, Ethers.js, and blockchain development tools
* Experience with DeFi, asset tokenization, or blockchain financial applications is a plus
* Ability to write secure, scalable, and well-tested smart contracts
* Strong problem-solving and communication skills

Hiring Process:
* Git hub check and initial discussion
* Participate a short tech assignment based on the real project
* Video meeting(MUST) for project and salary discussion
* Offer

Please note:
* No agencies or development firms. Individual freelancers only.**
* We're looking for 1–2 talented developers for long-term collaboration.
* Please include your GitHub profile (and any relevant blockchain projects) with your application.

Both full-time and part-time collaboration will be considered for the right candidate.

If you're passionate about building innovative Web3 products and enjoy working with a small, experienced team, we'd love to hear from you.

Hoi Mosh

Hoffe es geht Dir gut. Wir haben auf der neuen Robinhood Blockchain (EVM) ein Launchpad für Memecoins gebaut. Allerdings muss da noch ein Profi drüber für den Audit und ein Paar andere Sachen. Falls Du Zeit und Lust hast, könnten wir gerne die Details besprechen. Wäre dringend 😅

PS: Wir bauen und launchen ständig Sachen, einen guten Dev in der Schweiz zu haben, wäre generell ein riesen Vorteil für uns. Unser anderes Projekt haben wir auf Base gebaut, das braucht auch noch einen Audit.

Liebi Grüess
Armin

We are looking for an experienced Senior Blockchain Engineer to join our team and play a key role in the evolution of our next-generation Web3 gaming platform.

We have already built the core foundation of the platform, including smart contract infrastructure, NFT functionality, and wallet integration. As we enter the next phase of development, we're expanding the ecosystem with advanced features such as staking, governance, treasury management, on-chain analytics, and community-driven experiences.

This is an opportunity to work on a long-term project from an early stage, collaborate with a highly experienced engineering team, and help shape the technical architecture of a scalable Web3 gaming platform.

We're seeking an engineer who combines strong hands-on development skills with the ability to make sound architectural decisions, improve existing systems, and contribute to the long-term technical direction of the product.

-Responsibilities
1. Review and improve the existing blockchain architecture and smart contracts.
2. Design and implement secure, scalable, and maintainable smart contract solutions.
3. Develop new Web3 features, including staking, governance, treasury, and NFT-related functionality.
4. Collaborate with frontend, backend, and product teams to deliver high-quality features.
5. Conduct code reviews and recommend architectural improvements.
6. Ensure security, performance, and best practices throughout the development lifecycle.
7. Stay current with emerging blockchain technologies and industry standards.

We are seeking a detail-oriented freelancer to assist with crypto reconciliation and reporting. Multiple wallets, multiple years. we have most of the data, but some is missing due to hacks/closure/theft. You must have the ability to reconstruct missing data using blockchain techniques. You must also be expert in analysis of current Koinly records to check for duplication. The role involves ensuring accuracy and compliance in financial records, preparing reports, and maintaining data integrity. The ideal candidate will have experience in accounting and financial analysis, with a strong attention to detail and the ability to work independently.

Join our team to develop a decentralized app using Web3 technologies. You'll work on both front-end and back-end, ensuring seamless integration and functionality. Collaborate with our team to design and implement features that enhance user experience and security. This role requires a strong understanding of blockchain and smart contract integration.

We are looking for an experienced Web3 Business Development & Partnerships Specialist to help identify and onboard early-stage blockchain projects for a new platform.

This is not a social media or community management role. Your primary focus will be sourcing high-quality Web3 founders, building relationships, and converting them into long-term partners.

Responsibilities:
Research and identify promising early-stage Web3 projects (DeFi, AI, RWA, Gaming, Infrastructure, Meme, etc.)
Find projects that are preparing for a token launch, fundraising round, or community growth campaign
Reach out to founders via X, Telegram, Discord, LinkedIn and email
Schedule discovery calls with qualified prospects
Build and maintain a pipeline of potential partners
Follow up with leads until they are qualified
Provide weekly reports on outreach activity and pipeline progress

Requirements:
Proven experience in Web3 Business Development
Strong understanding of the crypto ecosystem
Existing network within Web3 is a strong advantage
Excellent written English
Comfortable communicating with founders and startup teams
Self-driven and able to work independently
Experience using CRM tools is a plus

Success Metrics:
Number of qualified projects sourced
Outreach volume and response rate
Discovery calls scheduled
Qualified partnership opportunities created
Successful onboarding of new projects

Engagement:
Part-time freelance position
Long-term collaboration preferred
Flexible working hours
Performance-based bonuses available for successful partner acquisitions

When Applying
Please include:

A short summary of your Web3 Business Development experience.
Examples of projects or partnerships you helped acquire.
Which blockchains/ecosystems you know best (Ethereum, Solana, Base, BNB, Arbitrum, etc.).
Your existing network within Web3 (if applicable).
Why you believe you are a good fit for this role.

We are looking for someone who is proactive, well-connected, and capable of building meaningful relationships with Web3 founders.

We are looking for an experienced Web3/Blockchain Engineer to help us build decentralized applications and smart contracts. You should have hands-on experience with Ethereum or other EVM-compatible chains, Solidity, and Web3 tools.

We are seeking an experienced Smart Contract Solidity Engineer to develop and deploy smart contracts on the Ethereum blockchain. The ideal candidate will have a strong understanding of Solidity and experience with blockchain development. Responsibilities include designing, testing, and optimizing smart contracts to ensure security and efficiency. Familiarity with Web3 technologies and blockchain platforms is essential.

We are seeking a blockchain expert who has an experience in web3 blockchain smartcontract.

We are building a blockchain platform, and token creation.

If you are interested, apply with github and portfolio link

Thanks

We are seeking a Blockchain Developer based in Bangalore who is early in their career. The ideal candidate will have experience with blockchain technologies and be eager to contribute to innovative projects. Familiarity with smart contracts and blockchain platforms is essential.
Great fit if you're:
- Early in your career (0–3 years experience) and looking to grow fast
- Solid with Solidity / smart contract dev, or quick to pick it up
- Comfortable with the dev lifecycle — writing, testing, deploying
- Excited to take on real ownership early

Analyze our blockchain to identify gaps, fixes, and improvements. Compile your findings into a document. This project requires a keen eye for detail and a strong understanding of blockchain technology. The ideal candidate will have experience in technical analysis and reporting.

Within the budget of $40 thry to cover as many as possible of these points:

-P2P as currently hosted on our server (meeting point) with examination of Port Forwarding and other solution to bypass NAT like UPnP
-used libraries for networking, handshaking etc

-are seed and login properly set? 

-is consensus based on PoU, executed as a votation among nodes?

-block production, rewards, transactions, mempol, need works? 

-Can they be optimised to reduce block time and increase TPS?

-signatures, describe briefly the solution

-ledger of the nodes is, ledger of the blocks how are they integrated or how should be integrated


About Variational

Variational is building a decentralized derivatives protocol for professional trading.

Our focus is on building reliable infrastructure that powers everything behind the trading experience—from order execution and settlement to blockchain indexing, risk management, and protocol services.

We've already built the first version of the protocol and an early version of Variational Pro. Now we're rebuilding and expanding parts of the platform as we prepare for the next stage of growth.

The Role

We're looking for an experienced backend engineer who enjoys building distributed systems and solving infrastructure problems.

Most of the work involves designing services that process blockchain events, coordinate protocol state, execute business logic, manage real-time market data, and connect on-chain and off-chain systems reliably.

You'll work directly with the founders and have significant influence over the architecture and evolution of the platform.

What You'll Build

You'll own backend systems across the platform, including:

- Blockchain indexing and event processing
- Execution and transaction orchestration
- Settlement, margin, collateral, and risk services
- High-performance APIs and internal services
- Market data pipelines and real-time infrastructure
- Caching, queues, and asynchronous processing
- Monitoring, observability, and production tooling
- Cloud infrastructure, deployment pipelines, and operational reliability

You'll help design systems that are simple, scalable, fault-tolerant, and easy for the rest of the engineering team to build on.

About VAR Token

VAR is the native token of the Variational protocol.

You'll help build the backend infrastructure that supports VAR across the platform, including distribution services, treasury integrations, protocol automation, buyback-and-burn infrastructure, and the services that connect the token with Variational Pro and future protocol features.

What We're Looking For

We're looking for engineers who enjoy building backend systems that operate under real-world load.

You should have strong experience with several of the following:

- Go (preferred), Node.js, Rust, or similar backend languages
- Distributed systems and concurrent programming
- PostgreSQL, Redis, messaging systems, and caching
- Event-driven architectures
- Docker, Kubernetes, AWS, and cloud infrastructure
- Blockchain infrastructure and Web3 integrations

Experience with exchanges, trading platforms, financial systems, or DeFi infrastructure is a strong plus, but we're ultimately looking for engineers who write reliable software, think carefully about system design, and enjoy solving difficult infrastructure problems.

What We Offer

- Build the backend systems that power the entire platform
- Direct collaboration with the founders and core engineering team
- High ownership with real architectural influence
- Flexible engagement (full-time, part-time, or consulting)
- Remote-first environment
- Competitive compensation

If you're the kind of engineer who enjoys designing distributed systems, optimizing backend performance, and building infrastructure that other engineers depend on every day, we'd love to talk.

About Variational

Variational is building a decentralized derivatives platform for professional traders.

Our platform combines a high-performance protocol, Variational Pro for advanced trading, and VAR, the protocol's native token. Together, we're building the infrastructure that enables sophisticated trading, capital-efficient markets, and the next generation of on-chain financial products.

We've built the first version of the protocol and an early version of Variational Pro. As we move into the next stage, we're looking for an experienced engineer to help us scale the platform, improve the architecture, and deliver production-ready systems.

The Role

We're looking for someone who enjoys building complete products. You'll work across the entire platform, moving between React, backend services, APIs, infrastructure, blockchain integrations, and smart contracts depending on what the product needs.

You'll collaborate directly with the founders, influence technical decisions, and have the freedom to improve systems wherever you see opportunities.

What You'll Build

Your work will span the entire platform, including:

- Variational Pro and future trading applications
- Blockchain integrations and smart contracts
- Backend services and APIs
- Real-time trading infrastructure
- Wallet integrations and transaction workflows
- Execution, settlement, and risk workflows
- Developer tooling and internal infrastructure
- Performance, monitoring, security, and scalability

We don't separate engineers into rigid frontend or backend roles. Everyone contributes where they can create the most value.

About VAR Token

VAR is the native token of the Variational protocol and a key part of the ecosystem.

You'll help build the systems that support VAR across the platform, including:

- Token smart contracts
- Distribution and vesting
- Treasury infrastructure
- Protocol integrations
- Revenue-driven buyback-and-burn infrastructure
- Future product features powered by VAR

You'll help ensure VAR is integrated thoughtfully into both the protocol and the user experience.

What We're Looking For

We're looking for engineers who are comfortable wearing multiple hats and enjoy solving problems across the stack.

You'll likely have experience with many of these technologies:

- React, Next.js, and TypeScript
- Solidity and EVM development
- Go, Node.js, or modern backend frameworks
- PostgreSQL, Redis, and API design
- Docker, Kubernetes, and AWS
- Web3 infrastructure and wallet integrations

Experience with DeFi, exchanges, trading platforms, or financial applications is a strong advantage, but exceptional full-stack engineers from other domains are encouraged to apply.

Most importantly, we're looking for someone who enjoys ownership, writes clean and maintainable code, and likes building products that people actually use.

What We Offer

- Build across both the product and protocol layers
- High ownership with direct influence on architecture and technical direction
- Work closely with the founders in a small, highly collaborative team
- Flexible engagement (full-time, part-time, or consulting)
- Remote-first environment
- Competitive compensation

If you're looking for a role where you can own meaningful parts of the product, work across the full technology stack, and help build the future of on-chain trading, we'd love to hear from you.

We are developing RWAvenue, a Web3-based Real-World Asset (RWA) marketplace that enables users to tokenize, trade, auction, and invest in valuable physical assets through blockchain technology.

The platform transforms assets such as luxury watches, fine art, collectibles, precious metals, real estate, stocks, bonds, and other high-value assets into secure on-chain digital assets, providing transparent ownership, trusted asset validation, and seamless peer-to-peer transactions.

We currently have an MVP and are looking for an experienced developer to help us expand it into a production-ready marketplace.

Here is what I'm after:
- Develop a modern, responsive web application using React/Next.js (or a similar framework) with a clean and intuitive user experience.
- Build scalable backend services using Node.js, Express.js, and PostgreSQL to manage users, assets, marketplace data, and transactions.
- Integrate Ethereum/Polygon smart contracts (ERC-721/ERC-1155) for asset tokenization and ownership management.
- Implement wallet connectivity (MetaMask, WalletConnect, etc.) and support secure blockchain interactions.
- Develop marketplace features, including:
* Browse and search tokenized assets
* Advanced filtering and sorting
* Asset detail pages
* User portfolios
* Auctions and direct trading
- Build an admin dashboard that allows administrators to:
* Create and manage asset listings
* Upload images and supporting documents
* Manage users and permissions
* Review and approve asset submissions
* Monitor marketplace activity
- Integrate decentralized or cloud storage (IPFS, AWS S3, or similar) for asset images and metadata.
- Write clean, maintainable, and well-documented code following modern development standards.
- Collaborate through GitHub using pull requests and participate in regular code reviews.

Acceptance Criteria
1. Users can browse, search, and filter tokenized assets with fast page loading and responsive performance.
2. Each asset has a dedicated detail page displaying images, descriptions, ownership information, and token metadata.
3. Wallet connection and blockchain interactions function correctly on the selected testnet.
4. Administrators can create, edit, approve, and manage asset listings through the admin dashboard.
5. Smart contracts successfully tokenize assets and record ownership on-chain.
6. Marketplace functions, including listing, trading, and auction workflows, operate correctly within the MVP scope.
7. Backend APIs are secure, well-structured, and integrated with PostgreSQL.
8. The project follows best practices for code quality, including ESLint, Prettier, automated testing, and clear documentation.
9. The solution is designed with scalability in mind so future AI-powered features and additional blockchain networks can be integrated without major architectural changes.

If this sounds like a project you'd enjoy, please tell me:
- Which technology stack you recommend for this project.
- Your experience building Web3 or blockchain applications.
- One or two similar projects you've worked on.
- Your estimated timeline and availability.
- Any suggestions you have for improving the overall architecture.

Skills: PHP, JavaScript, Node.js, AngularJS, React.js, Blockchain, Web Development, Next.js

We are building an EVM compatible protocol that enables supplying of crypto assets as collateral in order to borrow the base asset. Accounts can also earn interest by supplying the base asset to the protocol.
Our goal is to integrate 9 networks into our project like Binance Smart Chain, Polygon. We are pleased to inform you that we have already successfully implemented integration with zkSync.
You will play a crucial role in developing the smart contract for our cutting-edge DeFi platform and ensuring seamless and secure integration.

Responsibilities:
-Collaborate with cross-functional teams to design and implement smart contracts using Solidity.
-Participate in code reviews, testing, and deployment processes to ensure high-quality software.
-Stay updated with the latest trends in blockchain technology and DeFi applications to drive innovation.
-Troubleshoot and resolve issues related to dApps, smart contracts, and blockchain integration.

Requirements:
-Strong understanding of Solidity and experience in developing smart contracts.
-Experience with Ethereum blockchain and other decentralized networks.
-Familiarity with version control systems and agile development practices.
-Excellent problem-solving skills and attention to detail.
-Strong communication and collaboration skills.

Benefits:
-Competitive salary and performance-based bonuses.
-Flexible working hours and remote work options.
-Opportunities for professional development and growth within the team.

Are you a talented Senior Engineer looking for a remote job that lets you showcase your skills and earn competitive compensation?

What we offer:

• The rate depends on your seniority level, skills and experience.
• No more hunting for clients or negotiating rates - let us handle the business side of things so you can focus on what you do best.
• We'll manually find the best project for you according to your skills and preferences.
• Choose a schedule that works best for you. It’s possible to communicate async or minimally overlap within team working hours.
• We respect your seniority so you can expect no micromanagement or screen trackers.
• Communicate directly with the clients. Most of them have technical backgrounds. Sounds good, yeah?
• Most of our projects involve working in a fast-paced startup environment. We hope you like it as much as we do.

We are currently looking for Senior Blockchain Engineers for different projects.

Requirements – Senior Blockchain Engineer with Ethereum/Ethers/Web3:

• 4+ years of software development experience.
• 3+ years of Ethereum ecosystem expertise, Ethers.js, Viem, Wagmi or Web3.js (required).
• Experience with React and Node.js, including at least 2 commercial projects.

Requirements – Senior Blockchain Engineer with Solana/Solidity:

• 4+ years of software development experience.
• 2+ years of expertise in Solana or Solidity (required).
• Experience with Smart contracts is a must.

Other requirements:

• Strong technical skills: as a Senior Engineer, you are expected to be able to create projects from scratch and have a deep understanding of application architecture.
• Clear and effective communication in English - advanced ability to discuss business tasks, justify decisions, and communicate issues. Good self-presentation is also essential for upcoming client calls.
• Strong self-organizational skills - ability to work full-time remotely with no supervision.
• Reliability - we want to trust you and expect that you won’t let us and the client down.
• Adaptability and Flexibility - the ability to onboard the project promptly after accepting it and start delivering results quickly.

We are looking for a talented Node.js Developer to join our team and work on cutting-edge Web3 applications. You will have hands-on experience integrating Web3 wallets such as MetaMask, WalletConnect, or similar into backend services. You will develop and maintain server-side components that facilitate secure interactions with blockchain networks. The role requires proficiency in Node.js, JavaScript, and relevant Web3 libraries such as Web3.js or Ethers.js. You will collaborate with frontend developers and blockchain engineers to ensure seamless wallet integration and transaction processing. Experience with blockchain protocols, smart contract interactions, and decentralized application architecture is highly valued. You will focus on building scalable, secure, and efficient backend systems for Web3 solutions.

We are seeking a skilled Web3 developer to create a custom Telegram bot for a Monad EVM faucet. The bot will facilitate token distribution and include a token check feature. Ideal candidates should have a strong understanding of blockchain technologies and Telegram bot development. You will collaborate closely with our team to ensure seamless integration and functionality. If you are passionate about innovative blockchain solutions and have the required skills, we would love to hear from you!

I am looking for an experienced developer or development team to build a secure crypto-based platform available as a private web application and/or mobile app (iOS and Android). The platform will allow users to register, deposit and withdraw cryptocurrency, participate in a referral program, and receive automated daily earnings based on predefined rules. The system should integrate with blockchain networks, automate transactions where possible, and include a comprehensive admin dashboard for managing users, payments, referrals, fees, and platform settings. Security, scalability, automation, and a clean user experience are top priorities.



Platform Requirements

* Develop a secure web application with a private URL and/or authenticated mobile app for iOS and Android.
* Implement strong security best practices to protect user accounts, funds, and data.
* Users can create an account using a referral code.
* When a new user registers through someone’s referral code, the referrer automatically receives a bonus (bonus rules will be provided later).
* Users can deposit cryptocurrency into their account.
* Users can withdraw cryptocurrency directly to their blockchain wallet.
* The platform should calculate and credit daily earnings based on rules that I will provide.
* The platform should automatically deduct platform fees or taxes when users withdraw funds.
* Automate deposits, withdrawals, referral bonuses, and other eligible transactions whenever possible.
* Provide an admin dashboard to manage users, transactions, referral bonuses, earnings, fees, and platform settings.
* Support popular cryptocurrencies such as Bitcoin, USDC, and USDT (Ethereum and Polygon networks initially, with the ability to add more networks later).

Technical Requirements

* Secure authentication.
* Encrypted storage of sensitive information.
* Blockchain wallet integration.
* Scalable architecture.
* Clean, maintainable code.
* Deployment assistance.
* Source code ownership transferred upon project completion.

Please include the following in your proposal:

* Examples of crypto or fintech projects you have built.
* Your recommended technology stack.
* Estimated development timeline.
* Estimated total cost.
* Any suggestions for improving the platform’s security, scalability, or automation.

About the project:
SBL Nova already monitors tens of billions of dollars in securities collateral for banks, broker-dealers, and RIAs. We're building the next version of that platform for a world where collateral increasingly lives on-chain - tokenized real-world assets, stablecoin settlement, and smart wallets that institutions can actually trust.

We're not hiring off a spec doc. We already have a working prototype( Nova Chain Console ) built in Next.js 16, React 19, and TypeScript. It's a real, running app: live wallet connect/disconnect, a functioning approval queue, working search, and live-ticking metrics. It runs today with zero backend or API keys, so you can clone it and see exactly what's already built before you even talk to us.

What we need a blockchain developer for:
- Wiring up a real ERC-4337 smart wallet (ZeroDev, Alchemy Account Kit, or Safe) behind our existing wallet context — replacing our mocked address with a live, session-key-scoped account
- Building the policy engine that governs what our AI agents can execute on their own vs. what requires human approval — this is the core control layer, since agents will have real authority to act
- Pulling real on-chain data into our collateral registry and transaction feed via an indexer (The Graph) or RPC provider (Alchemy/Infura)
- Standing up and helping audit the smart contracts referenced in our security registry (think Slither, Foundry, Echidna, Certora)
- Working across EVM chains — Ethereum, Arbitrum, and Polygon zkEVM to start

What we're looking for:
- Solid hands-on experience with EVM-compatible chains and smart contract development/interaction
- Real experience with account abstraction (ERC-4337) and smart wallets — not just theoretical familiarity
- Comfort with contract security practices, or experience working closely with an audit process
- Experience pulling and indexing on-chain data at scale
- Someone who can look at an existing codebase, understand the shape of a half-built system, and start extending it in clear milestones — rather than needing everything fully specced before starting
How we'll work together:

We'll share the full prototype repo up front so you can see exactly what exists and exactly where the gaps are. We want to move in scoped chunks — smart wallet infrastructure first, then the policy engine, then real data feeds — with clear milestones so both sides know where things stand.

If you've worked on tokenized real-world assets, account abstraction, or institutional-grade DeFi infrastructure, we'd love to see it — link past work or repos if you can.

We are looking for people who have access to a verified account with Bybit, KuCoin, MEXC, Bitget, or BingX that can be used in Russia to help collect pricing data throughout the customer journey for cross-border stablecoin use cases.

This project focuses on collecting pricing information at each stage of the journey, including fiat deposit, fiat-to-stablecoin on-ramping, stablecoin conversion, on-chain and off-chain transfers, cross-chain routing where relevant, and fiat off-ramping at the receiving end. We want the data collection to reflect the actual customer experience of moving value internationally through the platform, including the rates, spreads, and fees shown at different points in the process.

Data will be gathered through online account journeys and, where relevant, any additional steps needed to document the full flow.

Main deliverable:

Data entered into our forms, with supporting screenshots.

Main requirements:

Have access to a verified account with Bybit, KuCoin, MEXC, Bitget, or BingX that can be used in Russia.
Be able to access the platform and view pricing information as a user in Russia.
Comfortable documenting platform journeys involving fiat deposits, conversions, transfers, and withdrawals.
Good English.
Good computer skills.
Responsive and adaptable to changing requirements.

Important:
This project is for market research and data collection only. It does not require you to buy, sell, send, receive, or otherwise transact in digital assets or fiat currency.

We have multiple similar projects and are open to long-term collaboration.

Brazilian Crypto Community Representative (Telegram and WhatsApp), Part Time, Long Term

Description:

We are a US-based blockchain project (BNB Smart Chain) looking for a Brazilian Portuguese-speaking community representative to establish our presence in Brazilian crypto communities on Telegram and WhatsApp.

This is not a shill or promotion job. Our project is built around one idea: holders should be able to verify claims themselves instead of trusting promises. We publish short walkthroughs teaching anyone how to check token claims on BSCScan (supply, liquidity locks, multisig wallets, wallet restrictions), and our own project passes every check it teaches. Your job is to be openly identified as our community representative, share this educational content, explain clearly how our project differs from typical tokens (verifiable claims instead of promises), answer questions accurately in Portuguese, and hold real conversations. You will never promise returns, talk about price, or post in pump or signal groups.

Responsibilities:

1. Review and localize Portuguese translations of our educational content (first paid task, approximately 4 to 6 hours)
2. Identify substantive Brazilian crypto communities on Telegram and WhatsApp where educational content is welcome. Quality communities only, no pump groups
3. Research how Brazilian crypto communities and projects are responding to the new Central Bank VASP rules, so we operate correctly from day one (paid research, part of your first weeks)
4. Explain to communities how our project is different: every major claim is either verifiable on BSCScan or clearly labeled as a commitment, and you will be trained on which is which
5. Post and engage on a regular weekly schedule, openly identified as our representative
6. Answer community questions in Portuguese using our approved materials
7. Report weekly: where you posted, engagement, common questions, community sentiment

Requirements:

1. Native Brazilian Portuguese, strong written English for coordination with us
2. Genuine crypto knowledge: you should be comfortable reading a BSCScan page and explaining what a liquidity lock or a multisig wallet is
3. Active participant in Brazilian crypto communities already
4. Comfortable following strict brand and accuracy guidelines. We are a verification-first project and every claim you make must come from approved material

This role starts at approximately 5 hours per week, hourly, long term for the right person. Full project details, materials, and guidelines are shared with the selected candidate once a contract is in place.

To apply, answer these four questions in your proposal:

1. In your own words, what is a liquidity lock and why does it matter to a token holder?
2. Name two Brazilian crypto communities (Telegram or WhatsApp) you consider high quality, and one you would avoid, and why.
3. What lesson do you think Brazilian crypto investors took from cases like Atlas Quantum and GAS Consultoria?
4. A community member asks "how high will the price go?" What do you say?

I already have a deployed smart contract, polished UI files, and a working codebase, but logical errors are blocking the full flow. The dApp must run smoothly inside Trust Wallet, so it needs to:

• connect to the user’s Tron wallet,
• check the connected wallet’s energy,
• delegate energy automatically through the Catfee endpoints if the balance is too low, and
• sign and broadcast the raw transaction that interacts with my contract.

Right now the logical issue touches every step—wallet connection, energy check, and the final signing—so I need a developer who can read the current JavaScript/TypeScript code, trace the faulty logic, and deliver a clean, tested solution that behaves consistently on both mobile and desktop versions of Trust Wallet.

Deliverables
1. Corrected source code with clear comments on each fix.
2. Working Catfee delegation call integrated into the energy-check routine.
3. Verified transaction signing that completes without manual intervention.
4. Short README explaining setup, build commands, and any new dependencies.

I will provide:
• Figma screens and existing front-end assets.
• Current repository access and contract ABI.
• Test accounts for end-to-end validation.

Please let me know your experience with TronWeb, wallet providers inside Trust Wallet, and any similar dApps you have shipped. I’m ready to start as soon as the approach and timeline are clear.

Skills: JavaScript, Debugging, Blockchain, Frontend Development, Mobile Development, Figma, Smart Contracts, API Integration

About Us

EasyBlock Innovations is a blockchain development company building enterprise-grade Web3 solutions for startups and businesses worldwide. Our team develops scalable backend systems that power decentralized applications, digital asset platforms, crypto wallets, DeFi protocols, NFT marketplaces, and enterprise blockchain solutions.

We are looking for an experienced Backend Developer to build secure, high-performance APIs and backend services that integrate with blockchain networks and modern cloud infrastructure.

Responsibilities

Design, develop, and maintain scalable backend services and REST/GraphQL APIs.
Build secure authentication and authorization systems (JWT, OAuth 2.0).
Develop backend services for blockchain and Web3 applications.
Integrate smart contracts, wallets, and blockchain nodes into backend systems.
Design efficient database schemas and optimize query performance.
Implement caching, queues, and background job processing.
Build real-time services using WebSockets and event-driven architectures.
Write clean, maintainable, and well-tested code.
Collaborate with frontend developers, blockchain engineers, and product managers.
Monitor application performance and troubleshoot production issues.
Participate in code reviews and architectural discussions.
Contribute to CI/CD pipelines and cloud deployments.

Required Skills

4+ years of professional backend development experience.
Strong proficiency in Node.js and TypeScript.
Experience with NestJS or Express.js.
Solid understanding of RESTful API and GraphQL development.
Experience with PostgreSQL, MySQL, or MongoDB.
Familiarity with Redis and message queues (RabbitMQ, Kafka, or BullMQ).
Experience integrating Web3 libraries such as Ethers.js or Web3.js.
Knowledge of Docker and containerized deployments.
Experience with Git, GitHub, and Agile development workflows.
Strong debugging, problem-solving, and communication skills.

Preferred Qualifications

Experience with AWS, Google Cloud, or Microsoft Azure.
Experience deploying applications with Kubernetes.
Knowledge of blockchain architecture and EVM-compatible networks.
Familiarity with Solidity and smart contract interactions.
Experience building DeFi, NFT, or tokenization platforms.
Knowledge of microservices and event-driven systems.
Experience with CI/CD tools such as GitHub Actions or Jenkins.

Nice to Have

Experience with Python or Go.
Familiarity with Elasticsearch or OpenSearch.
Knowledge of monitoring tools such as Prometheus and Grafana.
Experience with blockchain indexing services such as The Graph.
Open-source contributions or personal blockchain projects.

Project Details

Remote
Long-term contract
30–40 hours per week
Flexible working hours with overlapping collaboration time

We're seeking engineers who enjoy building secure, scalable backend systems and are passionate about modern cloud technologies and Web3 infrastructure. If you're excited about solving complex engineering challenges and delivering production-ready software, we'd love to hear from you.

We are looking for a person who has an active account with Coinbase Exchange and can reliably collect pricing data throughout the customer journey for cross-border stablecoin use cases.

This project focuses on collecting pricing information at each stage of the journey, including fiat deposit, fiat-to-stablecoin on-ramping, stablecoin conversion, on-chain and off-chain transfers, cross-chain routing where relevant, and fiat off-ramping at the receiving end. We want the data collection to reflect the actual customer experience of moving value internationally through the platform, including the rates, spreads, and fees shown at different points in the process.

Data will be gathered through online account journeys and, where relevant, any additional steps needed to document the full flow.

Main deliverable:
Data entered into our forms, with supporting screenshots.

Main requirements:

Have access to a verified account of any of the platforms mentioned
Comfortable documenting platform journeys involving fiat deposits, conversions, transfers, and withdrawals
Good English
Good computer skills
Responsive and adaptable to changing requirements

This job does not require any digital asset or fiat transactions.

We have multiple similar projects and are open to long-term collaboration.

About Us

EasyBlock Innovations is a blockchain development company delivering enterprise-grade Web3 solutions for startups and businesses worldwide. We build secure, scalable blockchain applications including DeFi platforms, NFT marketplaces, tokenization solutions, crypto wallets, decentralized applications (dApps), and smart contract systems across leading blockchain networks.

We're looking for an experienced Smart Contract Developer to join our remote engineering team and help build next-generation blockchain products.

Responsibilities

Design, develop, test, and deploy secure Solidity smart contracts.
Build and maintain decentralized applications (dApps).
Develop ERC-20, ERC-721, ERC-1155, and custom token standards.
Integrate smart contracts with frontend and backend applications using Web3 libraries.
Perform unit testing, integration testing, and smart contract optimization.
Conduct security reviews and follow smart contract best practices.
Collaborate with UI/UX designers, backend developers, and product managers.
Participate in architecture discussions and technical planning.
Troubleshoot production issues and improve blockchain application performance.
Keep up to date with emerging blockchain technologies and industry standards.

Required Skills

3+ years of professional software development experience.
2+ years of Solidity smart contract development.
Strong understanding of Ethereum Virtual Machine (EVM).
Experience with Hardhat or Foundry.
Experience using OpenZeppelin Contracts.
Knowledge of smart contract security, gas optimization, and upgradeable contracts.
Experience with Git and GitHub.
Familiarity with REST APIs and Web3 integration.
Excellent problem-solving and communication skills.
Comfortable working in a remote, collaborative environment.

Preferred Qualifications

Experience with DeFi protocols.
Experience building NFT marketplaces.
Knowledge of Layer 2 networks (Arbitrum, Base, Optimism, Polygon).
Experience with wallet integrations (MetaMask, WalletConnect).
Smart contract audit experience.
Understanding of cross-chain protocols.
Experience with CI/CD pipelines.

Nice to Have

Experience with Hyperledger or enterprise blockchain.
Familiarity with Rust or Solana development.
Knowledge of Chainlink oracles.
Experience working in Agile teams.
Open-source blockchain contributions.

Project Type

Long-term
Remote
Contract (30–40 hours/week)
Opportunity to transition into an ongoing engagement based on performance.

We value clean code, security-first development, and engineers who enjoy solving complex blockchain challenges. If you're passionate about Web3 and building production-ready decentralized applications, we'd love to hear from you.

We're looking for 1–2 experienced Blockchain Developers with strong solidity skills to join our Web3 team and contribute to a long-term blockchain platform.

Requirements:
* Strong experience with Solidity and smart contract development
* Experience with EVM-compatible blockchains
* Knowledge of Web3.js, Ethers.js, and blockchain development tools
* Experience with DeFi, asset tokenization, or blockchain financial applications is a plus
* Ability to write secure, scalable, and well-tested smart contracts
* Strong problem-solving and communication skills

Hiring Process:
* Git hub check and initial discussion
* Participate a short tech assignment based on the real project
* Video meeting(MUST) for project and salary discussion
* Offer

Please note:
* No agencies or development firms. Individual freelancers only.**
* We're looking for 1–2 talented developers for long-term collaboration.
* Please include your GitHub profile (and any relevant blockchain projects) with your application.

Both full-time and part-time collaboration will be considered for the right candidate.

If you're passionate about building innovative Web3 products and enjoy working with a small, experienced team, we'd love to hear from you.

I am looking for a Senior Blockchain Engineer to join my team and help build a next-generation Web3 ecosystem from the ground up.

You will be responsible for designing and implementing blockchain architecture, developing and integrating smart contract systems, building decentralized application infrastructure, and creating scalable blockchain solutions that support token economies, on-chain interactions, and Web3 products.

You will work closely with frontend, backend, protocol, and product teams to design secure, efficient, and production-ready blockchain systems.