Find Blockchain Projects with Vollna

Hiring for Gold ID (Web3 Domain Name Service) on EVM Chain

(Urgent project / Budget negotiable)

Project Details:
I am building my own blockchain called “EGoldChain” (an EVM-compatible fork derived from BSC/Polygon). I want to develop a domain name registration system similar to ENS (Ethereum Name Service), using the .gold suffix.

Example: If a user registers the name nova, the system will generate nova.gold as an NFT.

---

Scope of Work

Part 1: Smart Contract (Solidity)

Deploy on EGoldChain (I will provide the RPC URL).

1. Core System:


• Write contracts based on the ERC-721 (NFT) standard.
• 1 domain name = 1 NFT.
• Suffix: must always end with .gold.


1. Functions:


• Register: Register new names (payment accepted in USDT, and USX in the future).
• Renew: Extend domain registration (pricing based on number of years).
• Set Record: Domain owner can set which wallet address the name points to.
• Resolve: Other systems can query to resolve a name → wallet address.


1. Pricing Logic:


• Pricing can be set based on character length (e.g., 3 characters = most expensive, 4 characters = cheaper, 5+ characters = standard price).
• Admin must be able to adjust prices later.


1. Metadata (Important):


• NFT image must be On-Chain SVG (generated directly in the contract, not stored on IPFS).
• Design: Gold & Black background, luxurious style, with the domain name displayed in the center.


---

Part 2: Frontend (Web DApp)

Connect with MetaMask + EGoldChain.

1. Homepage (Search):


• Search bar → check status: “Available” or “Taken.”


1. Minting Flow:


• If available → show price → select number of years → click Mint (pay with tokens).


1. Dashboard:


• Display all domains owned by the connected wallet.
• Buttons: Set Record, Transfer, Renew.


---

Deliverables

1. Source Code: Upload to my GitHub repository (both frontend and contract).
2. Deployment: Launch on the live chain and connect the web interface for full functionality.
3. Ownership: Transfer all Admin/Owner rights of the smart contract to my wallet.


---

Qualifications

• Prior experience writing NFT or DeFi smart contracts.
• Strong knowledge of Web3.js or Ethers.js.
• (Optional) Portfolio of similar past projects will be highly valued.

Skills: PHP, Website Design, Software Architecture, HTML, Blockchain, Ethereum, Frontend Development, Solidity, Smart Contracts, Web3.js

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 Web3 Developers to join our team and support the continued development of our blockchain gaming platform.
You will be responsible for building and improving decentralized features across both the front end and back end, with a strong focus on scalability and user experience.
Our platform is already in production, and current work includes UI/UX enhancements and bug fixes, followed by EVM and NFT integration.
You will work closely with the team to expand platform functionality and support upcoming game launches.

Hello,

I am looking for a Stripe expert to handle the Stripe onboarding of a SaaS business with a high dispute rate, operating multiple services, multiple acquisition channels, and international traffic.

Hi! We are building a crypto analytics SaaS product focused on data-driven smart money trading intelligence.

The platform tracks on-chain wallet activity, analyzes real trades, and presents actionable insights for traders. The product already has designs in Figma (landings and the platform itself) and a clear roadmap. We are looking for a strong full-stack developer to help us build and scale the core system.

Please note that this is not a quick MVP or marketing site. We are building a real product with long-term potential.

What You’ll Work On
• Building and maintaining a modern SaaS dashboard
• Integrating on-chain data sources (wallet swaps, transactions, performance metrics)
• Backend logic for wallet tracking, trade aggregation, and analytics
• APIs (internal + external) for signals, bots, and future integrations
• Working with product designs (Figma) and improving UX where needed
• Preparing the platform for future features (perps)

Tech Stack (Flexible, but expected experience)
• Frontend: React/Next.js/TypeScript
• Backend: Node.js/NestJS/Python (open to suggestions)
• Databases: PostgreSQL/ClickHouse/Redis
• Web3: EVM chains, on-chain data indexing, RPCs, third-party data providers
• Infra: AWS/Vercel/Docker
• Experience building SaaS products is a big plus

What We’re Looking For
• Strong full-stack experience (not just front-end)
• Real experience with Web3/blockchain data
• Ability to think in systems, performance, and scalability
• Comfortable working with an existing product vision (not just following tickets)
• Good communication and ownership mindset

Bonus points if you’ve worked on:
• Crypto analytics platforms
• Trading tools
• Bots, signals, or copy trading systems

Engagement Details
• Long-term collaboration preferred
• Flexible hours, async-friendly
• Competitive budget based on experience

How to Apply

Please include:
1. Relevant Web3 / SaaS projects you’ve worked on
2. Your role in those projects
3. Your preferred stack

We are seeking a High-Performance Rust Architect to lead the technical implementation of an automated micro-trading and arbitrage system. The project focuses on prediction markets (Polymarket, Kalshi) and cross-exchange price alignment.
You will not be starting from scratch; we have identified several core open-source frameworks (e.g., dr-manhattan-rust, poly-kalshi-arb) that need to be audited, integrated, and optimized for live execution.
Key Responsibilities
• System Integration: Deploy and customize existing Rust-based trading bots for Polymarket and Kalshi.
• Latency Optimization: Ensure the execution engine handles WebSocket feeds and order placement with millisecond precision.
• Reliability: Implement robust error handling, rate-limiting management, and safety "kill-switches".
• Data Logging: Ensure all trading activities (PnL, order logs) are structured for future automated reporting.
Required Skills
• Expert-level Rust: Deep experience with Tokio, Serde, and high-concurrency patterns.
• Trading Logic: Solid understanding of order books, AMM mechanics, and arbitrage strategies.
• Backend Mastery: Proficiency in PostgreSQL/DynamoDB for high-volume trade logging.
• Proven Track Record: Must have experience building low-latency systems or blockchain-related execution engines (Solana experience is a plus).
Application Questions (Must Answer)
1. How do you handle WebSocket connection drops in Rust to ensure the bot doesn't miss critical price movements?
2. Explain your approach to managing API Rate Limits when scanning multiple market pairs simultaneously.
3. Have you worked with dr-manhattan-rust or similar prediction market bots before?

• Describe your recent experience with similar projects
• Please list any certifications related to this project
• Include a link to your GitHub profile and/or website
• What frameworks have you worked with?
• Describe your approach to testing and improving QA

I have a multichain, non-custodial wallet running on Android and the next milestone is to add support for a brand-new blockchain that is not yet included in common libraries such as WalletCore or Web3j. The current app is written in Kotlin with a bit of Java, built in Android Studio, and already handles several EVM and non-EVM networks.

Your task is to wire the new chain into the existing architecture so that users can create addresses, view balances, sign and broadcast transactions, and see their history exactly as they do with the other networks in the app. You will be working with my existing Git repository, where the wallet logic, key management, and UI layers are cleanly separated. The custom chain exposes standard JSON-RPC endpoints; any additional SDK work that may be required should be handled inside a new module so it stays maintainable.

Deliverables
• A fully working integration module for the custom chain, including key derivation, balance polling, fee estimation, and transaction signing/broadcasting
• UI hooks that surface the chain in the send, receive, and portfolio screens
• Instrumented unit tests proving address generation and transaction validity on testnet and mainnet
• A brief technical note explaining the added classes, build steps, and how new chains can be plugged in the same way

If you have hands-on experience with Kotlin, Android Jetpack libraries, and blockchain RPC/SDK integration, this should feel familiar. Let me know about any similar wallet work you have done and the approach you would take to keep the codebase clean and modular.

Skills: Java, Mobile App Development, Android, Software Architecture, C++ Programming, Blockchain, Kotlin, Android App Development, API Development

We are seeking a skilled React/Web3 developer to join our team in building an innovative fintech platform. The ideal candidate will have a passion for creating intuitive user interfaces and experience with decentralized applications. You will work closely with our product and design teams to implement features that enhance user experience. If you are proactive, detail-oriented, and have a strong understanding of blockchain technology, we would love to hear from you. Please include examples of previous work in your application.

I am looking for a skilled and reliable web developer to create a professional, modern, and user-friendly website. The goal is to build a site that is visually appealing, easy to navigate, and optimized for performance across all devices.

Scope of Work

Design and develop a clean, responsive website

Ensure smooth user experience (UX) and intuitive navigation

Mobile-friendly and cross-browser compatible

Fast loading speed and basic SEO best practices

Secure, well-structured, and scalable code

Requirements

Proven experience in web development

Strong knowledge of HTML, CSS, JavaScript (and relevant frameworks/CMS if applicable)

Experience with responsive design

Good communication skills and ability to meet deadlines

Deliverables

Fully functional website

Source code and documentation

Support during final testing and deployment

Skills: PHP, Website Design, HTML, Website Management, React.js, UI / User Interface, Blockchain, React Native, Web Application, Website Development

We are seeking an experienced developer to assist in integrating support for a custom blockchain into our non-custodial multichain wallet. The ideal candidate will have a strong background in blockchain technology and experience with wallet development. Your expertise will help us expand our wallet's capabilities and enhance user experience. If you have a passion for innovative blockchain solutions and meet the required skills, we would love to hear from you!

We are looking for an experienced Base (Coinbase L2) blockchain developer to join our Web3 project.

**About the Project:**
We are building a decentralized application (dApp) on the Base blockchain, Coinbase's Layer 2 solution built on the OP Stack. The project involves developing smart contracts and integrating them with our frontend application.

**Requirements:**
- Strong proficiency in Solidity and smart contract development
- Experience with the Base blockchain ecosystem or other EVM-compatible chains (Ethereum, Optimism, Arbitrum)
- Familiarity with Hardhat, Foundry, or similar development frameworks
- Understanding of DeFi protocols, NFTs, or related Web3 concepts
- Experience with Web3 libraries (ethers.js, wagmi, viem)
- Knowledge of security best practices and common smart contract vulnerabilities

**Responsibilities:**
- Design and develop secure smart contracts on Base
- Write comprehensive tests and documentation
- Conduct code reviews and implement security best practices
- Collaborate with the frontend team for seamless integration
- Optimize gas efficiency and transaction costs

**Nice to Have:**
- Experience with The Graph for indexing
- Previous work on Optimism or other OP Stack chains
- Familiarity with account abstraction (ERC-4337)

Please share relevant projects you've worked on, especially any deployed contracts on Base or similar L2 solutions.

Vision du Projet

SlitherChain est une révolution dans le gaming compétitif en ligne. Nous fusionnons l'addictivité des jeux .io classiques avec la transparence et les opportunités économiques de la blockchain. Imaginez Slither.io, mais où chaque mouvement a une valeur réelle, chaque victoire rapporte, et chaque joueur contrôle véritablement ses actifs.

Le Concept Unique
Le Combat pour la Survie Économique
Dans un arène numérique infinie, les joueurs incarnent des serpents à la recherche de puissance et de richesse. Chaque entrée dans l'arène représente un engagement financier qui devient à la fois votre bouclier et votre butin. Vous ne jouez pas pour des points virtuels, mais pour des actifs numériques réels que vous pouvez accumuler et retirer à tout instant.

Le Mécanisme Équitable

Entrée standardisée : Chaque participant commence sur un pied d'égalité
Économie fermée : La valeur totale en jeu reste constante, se redistribuant entre les joueurs
Transparence totale : Chaque transaction, chaque victoire, chaque perte est immuablement enregistrée sur la blockchain

L'Intégration Blockchain Innovante

Portefeuille, Votre Identité Numérique
Les joueurs se connectent avec leur portefeuille Phantom, transformant leur identité blockchain en avatar de jeu. Votre adresse Solana devient votre nom, votre historique de transactions devient votre légende, et votre solde devient votre puissance de jeu.
Smart Contracts Autonomes
L'économie du jeu est gouvernée par des contrats intelligents qui :
Automatisent la répartition des mises
Garantissent l'équité des redistributions
Permettent des retraits instantanés et sans confiance
Éliminent tout intermédiaire entre le joueur et ses gains

L'Expérience de Jeu

Tension Continue
Contrairement aux jeux traditionnels où vous pouvez vous détendre, chaque seconde dans SlitherChain compte. Votre serpent n'est pas juste une collection de pixels - c'est votre portefeuille ambulant. Chaque mouvement est calculé, chaque décision a un poids financier, et chaque adversaire représente à la fois une menace et une opportunité.
La Stratégie de Sortie
L'innovation majeure : le retrait stratégique. À tout moment, en maintenant la touche ESPACE pendant 3 secondes, vous pouvez quitter l'arène avec vos gains. Mais attention - ces 3 secondes vous rendent vulnérable. Dois-vous partir avec vos gains actuels ou risquer le tout pour le tout ?

Architecture Technique

Frontend Immersif
Moteur de jeu Phaser.js optimisé pour des centaines de joueurs simultanés
Interface qui fusionne l'action de jeu et les données blockchain en temps réel
Animations fluides et feedbacks haptiques qui renforcent l'impact de chaque action économique
Backend Temps Réel
Serveur Node.js avec Socket.io pour une synchronisation milliseconde
Architecture élastique capable de gérer des milliers de connexions simultanées
Système de matchmaking intelligent qui équilibre les arènes par niveau et par stack
Couche Blockchain
Smart contracts Solana écrits en Rust via le framework Anchor
Système de tokens SPL pour représenter les valeurs en jeu
Oracles pour vérifier les résultats de jeu sur la blockchain
Architecture de sécurité multi-signature pour les fonds de réserve

Le Système de Réputation

Votre adresse blockchain devient votre identité gaming permanente. Chaque victoire, chaque gain, chaque stratégie de sortie est enregistrée, créant :
Un historique de jeu immuable
Un système de classement décentralisé
Des badges et accomplissements NFT
Une légende qui vous suit à travers toutes les sessions

L'Économie Circulaire

Le Cycle de Valeur
Les joueurs entrent avec des actifs réels
Ces actifs circulent dans l'écosystème du jeu
Les meilleurs joueurs accumulent la valeur
Les joueurs peuvent sortir à tout moment avec leurs gains
La plateforme prélève une commission transparente sur chaque entrée
Transparence Totale
Chaque SOL déposé, chaque commission prélevée, chaque gain distribué est visible sur la blockchain. Aucune boîte noire, aucun mystère - seulement des mathématiques vérifiables et un code open-source.

Les Défis Techniques

Performance et Équité
Maintenir 60 FPS avec 500+ serpents simultanés
Synchronisation parfaite entre tous les clients
Détection de collision serveur-side inviolable
Protection contre la triche et les exploits
Sécurité et Confiance
Smart contracts audités et vérifiés
Système de retraits sans vulnérabilité
Protection contre les attaques réseau
Sauvegarde et récupération de compte

Pourquoi Ce Projet est Unique

SlitherChain n'est pas juste un jeu avec une couche économique ajoutée. C'est une fusion organique où :
La mécanique de jeu ET la mécanique économique sont une seule et même chose
La tension du gameplay naît directement du risque financier
La compétence du joueur se traduit directement en réussite économique
L'infrastructure blockchain n'est pas un gadget mais le cœur du système

L'Arène Digitale

Imaginez un espace où :
Des centaines de serpents lumineux tracent des chemins de lumière
Chaque couleur représente une stratégie économique différente
Les mouvements de foule créent des patterns émergents
Les collisions spectaculaires redistribuent instantanément la richesse
Les spectateurs peuvent suivre l'action et les flux de valeur en temps réel

Skills: Game Design, Node.js, Game Development, Blockchain, Web Development, Backend Development, Solidity, Smart Contracts, Cryptocurrency

Crypto Twitter Growth Strategist & Community Manager
We are seeking an experienced Crypto Twitter Growth Strategist & Community Manager to grow, engage, and manage our crypto-focused audience on Twitter (X). The ideal candidate understands crypto culture, trends, and community dynamics and knows how to turn followers into an active and loyal community.
Key Responsibilities:
Plan and execute a Twitter (X) growth strategy for crypto projects
Create and schedule engaging tweets, threads, polls, and community posts
Grow followers organically and increase engagement (likes, retweets, comments)
Build and manage an active crypto community
Engage daily with followers, influencers, and crypto conversations
Monitor crypto trends, hashtags, and competitor activity
Support token launches, NFT drops, and marketing campaigns
Track performance and provide regular growth and engagement reports
Requirements:
Proven experience in Twitter (X) marketing
Strong understanding of crypto, blockchain, DeFi, NFTs, or Web3
Experience in community building and audience engagement
Ability to write clear, engaging, and viral crypto content
Familiarity with Twitter analytics and growth tools
Consistent, proactive, and results-driven mindset
Nice-to-Have (Bonus):
Influencer outreach and collaborations
Discord or Telegram community management
Meme marketing and trend-based content creation
Prior experience with crypto startups or token projects
What We Offer:
Long-term collaboration opportunity
Flexible working hours
Competitive pay based on experience
Opportunity to work with innovative crypto projects

We are seeking a skilled writer for our crypto news & media company.

The role involves writing crypto, blockchain, AI, and Web3 news content.

Condition: daily minimum 1-2 news writing .

Writing a news give me our editor done .

Requirements:

1. Strong knowledge of crypto & blockchain

2. Excellent English writing skills

3. Experience in cryptonews writing or copywriting , AI news writer , preferred

Join a fast-growing crypto media startup with a bright future.

Skills: Ghostwriting, Article Writing, Article Rewriting, Content Writing, Blockchain, Digital Marketing, Cryptocurrency, AI Content Writing

We are seeking an experienced Chief Operating Officer (COO) to lead the operational strategy of our on-chain prop trading firm. The ideal candidate will oversee day-to-day operations, manage support teams, ensure efficient payouts, and refine our internal processes. Your expertise will be crucial in scaling our firm while maintaining operational excellence. If you have a strong background in trading operations and a passion for blockchain technology, we would love to hear from you.

I need assistance withdrawing USDT from a Rudex node on Trust Wallet. The withdrawal process should be manual.

Ideal skills and experience:
- Familiarity with Rudex and Trust Wallet
- Experience with USDT transactions
- Knowledge of manual withdrawal processes

Skills: Bitcoin, Blockchain, Ethereum, Smart Contracts, Cryptocurrency

I am tokenizing real-estate projects and need a polished, corporate-grade website that lets accredited and retail investors buy blockchain tokens backed by property shares. The entire flow must run on Polygon, so Web3 wallet connection, smart-contract calls, and gas-fee handling have to be native to that chain.

Core features I must see live in the first release:
• Secure token-purchase platform tied to my Polygon smart contract, with KYC gating and MetaMask (or WalletConnect) support.
• Detailed property pages that look and feel like a professional brokerage: high-resolution media, financial projections, location maps, and live funding progress pulled from the contract.
• Personal investor dashboard summarising wallet holdings, yield, vesting schedules, and downloadable statements.

Back-end preference is flexible as long as it integrates smoothly with the Polygon network (Node.js, Next.js, React or similar are fine). The front end has to echo a corporate and professional aesthetic—think clean typography, restrained colour palette, and concise UI micro-interactions.

Deliverables
1. Production-ready Polygon smart contract (ERC-20 or security-token standard) with mint, burn, and dividend distribution functions.
2. Fully responsive website with the three core modules above, deployed to my hosting provider.
3. Source code in a private Git repo, installation docs, and a brief hand-off session.
4. Basic test suite plus one round of bug fixes after launch.

Acceptance criteria
• All contract calls complete successfully on Polygon mainnet.
• Dashboard numbers match on-chain data in real time.
• Pages score 90+ on Google Lighthouse for performance and accessibility.
• UI matches provided wireframes and keeps a consistent corporate style.

If you have prior experience building token purchase flows or real-estate platforms on Polygon, that will move things along quickly. I’m ready to start as soon as I see a concise plan and timeline from you.

Skills: Corporate Identity, Node.js, Git, Blockchain, Web Development, Smart Contracts, Next.js, Accessibility

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.

I am looking to create crypto education curriculum that guides individuals in understanding cryptocurrencies and making informed investment decisions. A understanding of technical analysis, or strong interest would be helpful.

The curriculum will cover key topics such as blockchain technology, investment strategies, risk management, and market analysis. The ideal candidate will have a strong understanding of the cryptocurrency space.


Social media marketing is as, if not more important.

• Are you invested in crypto? What are your top 3 hodlings and why?
• In what aspect could you most contribute to this project?
• Why are you a “bitcoiner”?

Position: Blockchain Developer (Freelance/Contract)
Type: Remote, Project-Based Contract

About the Role:
We are seeking an experienced Blockchain Developer to implement smart contract functionality and blockchain integration for our platform. The project involves deploying token contracts on Polygon PoS and integrating with an existing backend system.

Responsibilities:
Smart Contract Development:
- Design and develop smart contracts using ERC1155 standard (OpenZeppelin)
- Implement token minting and burning functionality with metadata support
- Implement role-based access control for admin operations
Emit events for off-chain indexing and tracking
- Write comprehensive unit tests with 100% function coverage

Blockchain Infrastructure:
- Set up Hardhat development environment with proper configuration
- Deploy and verify contracts on Polygon Amoy Testnet
- Prepare deployment scripts for Polygon Mainnet
- Configure gas management strategies for cost-effective operations (target: less than $0.01/tx)

Backend Integration Support:
- Collaborate with backend team to integrate blockchain service using ethers.js or Web3j
- Define API interfaces for contract operations
- Design event listener architecture for blockchain confirmations
- Document integration patterns and provide code samples

Security & Best Practices:
- Follow Solidity security best practices (reentrancy guards, access control)
- Prepare contract for external security audit
- Implement multisig support for admin operations (Gnosis Safe compatible)
- Document key management recommendations

Required Technical Skills:
Must Have:
- 3+ years of Solidity smart contract development experience
- Proven experience with ERC1155 or ERC721 token standards
- Hands-on experience with Polygon PoS network (mainnet deployment preferred)
- Proficiency with Hardhat development framework
- Experience with OpenZeppelin contracts library
- Strong understanding of gas optimization techniques
- Experience writing comprehensive test suites (Chai, Mocha)
- Familiarity with ethers.js library

Nice to Have:
- Knowledge of IPFS for metadata storage
- Experience with Gnosis Safe multisig setup
- Familiarity with Spring Boot / Kotlin backend integration
- Experience with security audit preparation and remediation
- Knowledge of event indexing solutions (The Graph, custom listeners)

Deliverables:
# | Deliverable | Description
1 | Smart Contract | Production-ready ERC1155 contract with full documentation
2 | Test Suite | Unit tests with 100% coverage using Hardhat/Chai
3 | Deployment Scripts | Hardhat scripts for testnet and mainnet deployment
4 | Testnet Deployment | Verified contract on Polygon Amoy with demo transactions
5 | Integration Guide | Technical documentation for backend integration
6 | Security Checklist | Pre-audit security assessment and recommendations
7 | Mainnet Deployment | Production deployment after audit completion

Technical Environment:
- Blockchain: Polygon PoS (Amoy Testnet → Mainnet)
- Smart Contract: Solidity ^0.8.20, OpenZeppelin Contracts
- Development: Hardhat, TypeScript

• Describe your recent experience with similar projects
• Please list any certifications related to this project
• Include a link to your GitHub profile and/or website
• What frameworks have you worked with?
• Describe your approach to testing and improving QA

What: I am looking for a creative and skilled developer to build "Critical Path," a retro-inspired side-scrolling platformer game set in a Gantt Chart. The game is a 2-minute race against an impending "Deadline Wall" where the player navigates program elements, dodges project-management villains, and collects milestones.

Why: The purpose is for us to demonstrate our company's software at conferences in an engaging way.


---Gameplay Overview---


Horizontal Progression
The game takes place in a Gantt chart. Player must reach a goal at the far right side of the level. Player can climb up/slide down on dependencies and jump between/through horizontal bars.


Mechanics
Standard run/jump physics, including onto floating platforms and sliding/climbing on "Dependency" lines.


Protagonist
Schedulemaster: a business professional or military character that users can select from a few options


Antagonists
Scope creeps: A blob crawls up from behind and latches on to the player to slow them down.
Says “Wouldn't it be cool if..."

Good idea fairy: Flies in to create a Gantt bar that you can’t actually stand on, they just get in your way.
Says “Can we put our supply chain on the blockchain?”

Tech debt gremlin: Googly-eyed mass of bubblegum, paper clips, rubber bands, and duct tape that tears a hole in the background, tips over bars.
Says “We’ll fix it in post!”

HiPPO (Highest paid person’s opinion): Suited executive hippo destroying bars and swinging at you with his golf club
Says “Let’s hire a consultant”

CR: Screen abruptly flashes “Continuing Resolution!” every October. Result is 2-5 seconds without the ability to jump, and character slows to 75% speed of the deadline wall

Deadline wall: Constantly moving left to right to keep pace of play to under 120 seconds.


Collectibles

Coffee pot: Flight and invincible for 10 seconds. 250 points.

Milestones: Ten colored gemstones. Endgame multiplier + 0.1x for each collected.


---End Game---
- Game over screen: PROGRAM CANCELLED or MISSION SUCCESS
- Tally points earned, add remaining time to score at a rate of 100 points per second ahead of schedule, multiply by milestones collected
- Enter email for our database, and first initial and last name for leaderboard


---Form Factor---
- Web deployed
- Leaderboard by month and all-time
- Mission success wins a prize
- Control via joystick and one jump button


---Deliverable---
- The game. A web-based functional game including a 2-minute level, ideally randomly generating each time. Ownership of the code.
- Assets. I will provide the conceptual details and sketches but will need help bringing them to life.



---Candidate requirements---
- Experience with 2D platformer physics and "moving wall" logic.
- Experience designing game assets
- Bonus for project management experience and knowledge of Gantt Charts

We are looking for a highly skilled Full-Stack Developer to build a production-grade Web3 application that integrates Blockchain, API, AI model, and Payment Gateway functionality, available for both web and mobile platforms. This project requires front-end, back-end, and mobile app development, along with blockchain smart contract deployment, automation workflows, and seamless AI model integration.

The objective is to develop a scalable, secure, and modular platform with advanced blockchain features, including smart contracts, as well as AI integration and payment gateway functionality. Both web and mobile apps will interact with the blockchain and backend services.


-----------------------------------------------------------------------------------------------------------------------------

Scope of Work
Blockchain & Smart Contracts
• Design and deploy production-ready smart contracts (ERC20 / ERC721 / custom logic).
• Implement:
• Role-based access control
• Event emission for backend automation
• Gas optimization and secure validation
• Deploy contracts on testnet and provide deployment details.

Backend Development & Automation
• Build a Node.js / Express.js backend.
• Integrate blockchain interaction using Web3.js / Ethers.js.
• Implement automation workflows triggered by blockchain events.
• Develop RESTful APIs for both web and mobile app communication.
• Add proper logging, error handling, and validation.

Frontend Development
• Web Application: Develop a production-ready front-end using React.js.
• Implement Web3 wallet connection (MetaMask or similar).
• Smart contract interaction UI.
• Transaction status and history views.
• Follow component-based architecture and scalability best practices.
• Mobile Application: Develop a cross-platform mobile app using Flutter.
• Implement Web3 wallet connection for mobile.
• Mobile UI for smart contract interaction and transaction history.

Database & Data Management
• Integrate MongoDB or PostgreSQL.
• Store user interaction data, transaction metadata, and automation logs.
• Ensure data integrity and structured schema design.

AI Model Integration
• Integrate AI models for enhanced features such as data processing, prediction, or recommendations.
• Ensure seamless integration of the AI models with the front-end and back-end.

Payment Gateway Integration
• Implement payment gateway integration (e.g., Stripe, PayPal, Cryptocurrency).
• Ensure secure and smooth transaction handling for web and mobile apps.

Code Quality & Deployment
• Use Git-based version control.
• Deliver clean, modular, and well-documented code.
• Provide environment configuration and deployment scripts.
• Follow production coding standards and best practices.

--------------------------------------------------------------------------------------------

Deliverables
• Deployed smart contracts on testnet.
• Fully functional full-stack Web3 application (web and mobile).
• Backend automation integrated with blockchain events.
• REST APIs with documentation.
• AI model integration and data-driven functionality.
• Payment Gateway integrated within the platform.
• Clean, production-ready source code.
• Short technical documentation explaining system architecture.

--------------------------------------------------------------------------------------------

Skills Required
• Blockchain Development (Ethereum, Solidity, Smart Contracts)
• Web3 Integration (Web3.js, Ethers.js)
• Full-Stack Development (React.js, Node.js, Express.js, PHP, Laravel, Django)
• Mobile App Development (Flutter)
• AI Model Integration
• API Development & Integration
• Backend Development (Node.js, Python, Laravel)
• Frontend Development (React.js, JavaScript)
• Database Management (MongoDB / PostgreSQL, MySQL)
• Payment Gateway Integration (Stripe, PayPal, Cryptocurrency)
• Git & Deployment Practices
• Software Development

--------------------------------------------------------------------------------------------

Project Type
• Fixed Price

Budget
• USD $400 – $800 (Negotiable based on experience and delivery quality)

Project Timeline
• 19 Days

⸻

Preferred Freelancer
• Proven experience in production-level blockchain projects.
• Strong understanding of automation, backend workflows, mobile app development, and AI integration.
• Ability to deliver clean, scalable, and secure code.
• Clear communication and documentation skills.

⸻

How to Apply
Please include:
• A brief overview of your relevant experience.
• Technologies you will use for this project.
• Estimated timeline for delivery.

Skills: JavaScript, Mobile App Development, Web Development, Flutter, API Development, AI Development, AI Agents

Description:
• "I need an experienced blockchain developer to build a custom EVM-compatible chain (Fork)."
• "Requirements: Setup Genesis Block, customize Chain ID, simple consensus setup (PoA), and deploy Block Explorer."
• "Deliverable: Source code uploaded to my Private Github + Instruction Manual."
• Keyword: ใส่คำว่า Geth, Go-Ethereum, Hyperledger Besu, Polygon Edge

Skills: PHP, XML, Software Architecture, Golang, Amazon Web Services, Blockchain, Ethereum, Rust

Project: Polymarket Automated Trading Bot (Node.js or Python)

I’m looking for a blockchain developer to build a working Polymarket automated trading bot.
Language can be Node.js OR Python — whatever reliably works.

Goal (simple):
Automatically place YES and NO limit orders on Polymarket markets using the official CLOB API.

Core requirements:

Read Polymarket market URLs (CSV or list)

Extract market slug

Fetch YES / NO token IDs from Polymarket (Gamma API)

Place LIMIT GTC orders via Polymarket CLOB

Correct EIP-712 signing

Polygon mainnet (chainId 137)

Important technical points:

Use ethers.js (Node) or web3.py / eth-account (Python)

Wallet must sign orders correctly (no broken signer logic)

Price & size use 18 decimals

Support test/simulation mode vs live trading

Config via .env

Skills: PHP, JavaScript, Python, Software Architecture, Blockchain, Smart Contracts, API Development, Web3.js

We are seeking an experienced senior Hyperledger Fabric developer to create a CockroachDB adapter. The ideal candidate should have in-depth knowledge of Hyperledger Fabric architecture and be proficient in integrating databases with blockchain solutions. Your expertise will help us enhance our application performance and scalability. If you have a track record of developing blockchain solutions and can work collaboratively within a team, we want to hear from you. Please provide examples of your previous work in this area.

• Have you experience in implementing a new Fabric StateDB adapter and replace default LevelDB / CouchDB with other database?
• Include a link to your GitHub profile and/or website

We’re expanding the team behind Valkra app, an AI-powered smart contract analysis platform built to deliver industry-leading blockchain security audits across 35+ blockchains, 27+ languages, and 45+ frameworks.
If you’re passionate about blockchain security, Rust, AI, and scalable systems, we’d love to work with you.
What You’ll Work On
Enhancing a multi-language smart contract security analysis engine
Improving an 8-step audit pipeline (static analysis, fuzzing, AST analysis, AI-based detection, dynamic testing)
Building and optimizing Rust-based backend services and distributed workers
Extending LLM integrations (OpenAI, Anthropic, local models, etc.)
Improving performance, scalability, and reliability
Enhancing the Next.js frontend for audit reporting and management
 What We’re Looking For
Strong experience in one or more of the following:
Rust (async systems, backend services, workers)
TypeScript / JavaScript (Next.js, modern frontend)
Smart contracts (Solidity, Rust/Anchor, Move, Vyper, Cairo, etc.)
Blockchain frameworks (Hardhat, Foundry, Anchor, Substrate, CosmWasm)
Docker, PostgreSQL, Redis
Bonus points for:
Blockchain security or auditing experience
Static analysis, AST parsing, or fuzzing tools
AI / LLM integration experience
Engagement Details
Freelance / Contract basis(long-term potential)
Fully remote
Rate: $40 – $90 USD / hour (based on experience)
Interview Process
1. Submitting a short application form and experience assessment.
2. Participating in a technical interview with our engineering leads
3. Signing contract for selected candidates
How to Apply
If you are interested, please apply via our website or here.
Join us in building the future of AI-driven blockchain security website

Skills: Python, Programming, Web Development, Artificial Intelligence, Blockchain, Back End Development, Next.js, Docker Software

We are seeking an experienced Solidity developer to assist with the verification of an already-deployed smart contract on BSC Scan. You will be provided with all necessary contract details and will be responsible for ensuring the contract's code is accurately verified. A strong understanding of Solidity and experience with BSC Scan are essential for this task. If you're confident in your smart contract verification skills, we would love to hear from you!

Medium Writer with a Strong Medium Profile for B2B SaaS, Legal Tech & Cybersecurity (SEO-focused). The ideal candidate should have a strong understanding of SEO principles and the ability to create engaging, informative content that resonates with a professional audience. You'll be responsible for producing blog posts, whitepapers, and case studies that drive traffic and convert leads. If you're passionate about technology and can write with clarity and precision, we want to hear from you!

You’ll be writing a focused on contract management, e-signature, AI, blockchain, innovation, and high-tech

• How many Medium articles have you published in the last 12 months related to SaaS, B2B, legal tech, cybersecurity, procurement, or compliance?
• How many of your Medium articles currently rank on Google (top 20 results) for non-branded keywords?
• How many Medium publications have you been accepted into that are relevant to B2B, tech, or business topics?
• What is your average read ratio across your last 10 Medium articles?
• How often do you write SEO-driven, non-personal content based on a brief or outline? Please share 1–3 writing samples (Medium preferred)

We’re a startup working on a project that’s set to change online shopping by using blockchain to make it faster, more secure, and less costly. We’re building a decentralized platform and need an experienced blockchain developer to help us create the backbone of the system, with a key focus on developing our native token.

What You’ll Be Doing:

- Token Development: Create and integrate our cryptocurrency into the platform for payments, rewards, and staking features.
- Blockchain Infrastructure: Build and maintain the blockchain architecture that supports the platform.
- Smart Contracts: Write smart contracts to ensure secure, efficient transactions.
- Security: Keep the platform secure, fast, and reliable as we grow.

What We’re Looking For:

- 5+ years of experience with Ethereum and building smart contracts.
- Solid understanding of tokenomics and experience with features like staking and rewards.
- Proficiency in Solidity and Rust (or similar blockchain languages).
- A good grasp of security best practices for decentralized platforms.

Why You Should Apply:

This is an exciting opportunity to be part of a team that’s changing the way people shop online. You’ll have the chance to play a major role in the development of the platform, especially the token that powers everything. If you’re looking for a challenging role in a fast-paced environment with a lot of potential, we want to hear from you!

I’m upgrading my platform to process transactions through a dedicated blockchain gateway so every payment that passes through the system is cryptographically verifiable and tamper-proof. The job covers designing the gateway architecture, selecting an appropriate chain (Ethereum, Polygon, BSC or another you can justify), building or customising smart-contract code if that proves to be the simplest route, and exposing clean REST/JSON or Web3 interfaces my front-end can call.

The core success metric is end-to-end security: a user initiates a payment on the site, the request reaches the gateway, the transaction is written on-chain, and I receive an instantly checkable hash I can surface back to the user. Performance must remain within normal web-app latency, and the code needs to be clean enough for a future audit.

When you reply, focus on the secure-transaction gateways you’ve built or maintained, any chains or libraries you know inside out (web3.js, ethers.js, Hardhat, Truffle, Solidity, Golang, Rust, Hyperledger Fabric, etc.), and the challenges you solved around confirmations, gas optimisation, or key management. A concise outline of how you would approach this build will help me see whether your experience aligns with the project.

Deliverables
• Technical design and chain selection rationale
• Smart contract or ledger code (if used) with tests
• Gateway/API implementation ready for staging
• Deployment scripts and step-by-step documentation

I’m ready to start as soon as I find the right fit.

Skills: PHP, Java, JavaScript, Software Architecture, Laravel, Blockchain, Ethereum, Smart Contracts, Web3.js

Responsible for planning and executing organic marketing strategies to grow community, drive awareness, and increase holder acquisition for meme coin projects.

Key Responsibilities:

Build and manage communities on TG, Discord, and X

Execute organic shilling and community seeding campaigns

Coordinate with influencers and partner communities

Create and manage meme, post, and announcement content

Plan and execute pre-launch and post-launch marketing

Monitor sentiment, engagement, and holder growth

Track KPIs: members growth, engagement rate, holder count, retention

Required Skills:

Experience with crypto, meme coins, and Web3 culture

Strong understanding of viral content and community psychology

Ability to run organic growth without paid ads

Knowledge of launch cycles and hype management

Comfortable working in fast-moving, high-risk environments

Success Metrics:

Community growth rate

Engagement quality (not bots)

Holder acquisition and retention

Launch performance