Hire Vetted Blockchain Engineers at Upstaff - Page 2

• Software Engineer with 4+ years of experience specializing in backend systems, distributed platforms, and blockchain products using Go, TypeScript, Node.js, AWS, and Solidity.
• Proven expertise in building event-driven architectures, serverless workflows, and production smart contracts with a focus on clean architecture and high throughput, including migrating services to Go .
• Hands-on experience developing DeFi platforms, integrating Uniswap SDK, and managing secure multi-wallet infrastructures for scalable blockchain applications.
• Strong foundation in Computer Science with a BSc degree and MSc in Information Technology, complemented by specialized bootcamps in Solidity and Solana development.

• Software engineer with 5+ years specializing in full-stack Web3 applications, DeFi protocols, and scalable cloud infrastructure.
• Expertise in React, Node.js, TypeScript, Ethers.js, and AWS, demonstrated by architecting NFT marketplaces supporting ERC-721/1155 standards and integrating complex DeFi functionalities.
• Proficient in CI/CD pipeline development using AWS CodePipeline.
• Strong background in computer science with a Bachelor of Computer Application degree and hands-on experience in testing frameworks like Jest and React Testing Library to ensure code reliability.
• Skilled in Atomic Design architecture, RESTful API development, and cloud deployment, and user-centric blockchain applications.

• Master of Technology in Computer Science and Engineering from IIT Roorkee with a CGPA of 9.24/10.0, specializing in AI/ML, Blockchain, and Full-Stack development.
• Proficient in advanced AI/ML frameworks including LangChain, HuggingFace Transformers, and fine-tuning large language models (LLaMA-2) with LoRA and PEFT techniques.
• Hands-on experience in blockchain development with Solidity, ZK proofs, Chainlink CCIP, and deploying secure cross-chain applications.
• Skilled in CI/CD automation with Docker, Kubernetes, and ArgoCD, leading Agile teams and delivering high-quality software with 100% smart contract test coverage.

• Blockchain engineer with 6+ years in smart contract development using Solidity, Ethereum, Chainlink, and OpenZeppelin, specializing in upgradeable contracts.
• Proficient in backend API development with Node.js, AWS Lambda, DynamoDB, and integration of decentralized data analytics via The Graph protocol.
• Experienced in DevOps automation for blockchain deployments using Hardhat, Truffle, OpenZeppelin Defender, and Gelato, enhancing system security and scalability.
• Holds a Bachelor's degree in Information Science and Engineering with a 9.16 CGPA, certified by Emurgo Academy and Atrium Academy, and recognized for contributions in international hackathons and research conferences.

Developed and deployed blockchain and web3 applications involving smart contracts, wallet integrations, token management, and decentralized features. Built scalable frontend and backend systems using React.js, Node.js, and MongoDB. Worked on optimizing application performance, improving user experience, and integrating blockchain functionality securely with modern web technologies.

• Proven experience designing and implementing secure, Byzantine-fault-tolerant cross-chain NFT bridging protocols and decentralized DAOs on Ethereum and Massa blockchains.
• Skilled in full-stack development with Java Spring Boot, Angular, WebSocket/STOMP, and microservices architectures, delivering real-time applications and security audits.
• Strong background in information systems security audits, smart contract auditing, and cryptography, complemented by certifications in blockchain security and ethical hacking.
• Proficient with modern development tools and methodologies including UML, Git, REST APIs, pBFT consensus, and containerization with Docker, ensuring robust and well-tested solutions.

• Senior Software Engineer with 3+ years specializing in full-stack development and blockchain systems across EVM, Solana, and Bitcoin ecosystems.
• Proficient in JavaScript, TypeScript, Python, Rust, Go, and Solidity; experienced with React.js, Next.js, Node.js, REST APIs, and microservices architecture.
• Led smart contract development and backend automation for decentralized applications, including multi-chain DeFi platforms and NFT systems.
• Skilled in blockchain integrations, wallet connectivity, on-chain data processing, and decentralized storage using IPFS.
• Holds a B.E. in Computer Science and a P.G. Diploma in Fintech & Blockchain; awarded 1st place at BlockBash 2024 ICP Hackathon.

• Web3 Engineer with 2+ year experience in decentralized finance (DeFi) projects, specializing in scalable backend development and RESTful API design using Typescript, Golang and Solidity.
• Proficient in blockchain architecture, Web3 technologies, and smart contract development, with hands-on experience in Docker, MySQL, Linux, Git, and GitLab.
• Demonstrated ability to design, implement, test, and monitor backend solutions in fast-paced environments, contributing to cross-functional team projects.
• Experience in software development lifecycle (SDLC) practices, code quality assurance, and integration of new features enhancing end-user flows.

Senior Blockchain Developer with 4+ years of experience in designing and deploying smart contracts using Solidity, Hardhat, and Truffle across Ethereum, Hyperledger Besu (QBFT), Polygon, and BSC. Skilled in full-stack dApp development with Node.js, TypeScript, React, and Next.js, along with REST/GraphQL APIs and PostgreSQL/MongoDB. Built enterprise blockchain solutions including private DEX platforms, secure decentralized apps, and AI-integrated DeFi systems. Experienced in Docker, AWS EC2, CI/CD, cryptography, consensus mechanisms, and blockchain architecture.

• Blockchain engineer with 5 years in DeFi, cross-chain infrastructure, and EVM smart contracts, specializing in AMM math, precision-safe arithmetic, and gas optimization.
• Proficient in Solidity, TypeScript, C++, Python; skilled in security tools like Slither and Echidna, with Code4rena audit experience.
• Led design of cross-chain messaging protocols supporting 21 blockchains, achieving 44% gas cost reduction and $500K+ annual savings.
• Developed concentrated-liquidity AMM and liquid staking protocols with rigorous invariant validation and 100% unit test coverage using Foundry.
• Experienced in CI/CD, fuzz testing, static analysis, and formal security reviews within Agile environments.

With 3+ years of hands-on experience in smart contract development, DeFi protocols, and DApps, I bring deep expertise in Solidity, Web3, and blockchain architecture. I’ve deployed and audited secure, gas-optimized contracts on major networks, and thrive in fast-paced environments. My strong problem-solving skills and passion for decentralized tech make me a valuable asset to any blockchain team.

• DeFi-focused Smart Contract Engineer with 5+ years of experience in designing, deploying, and maintaining Ethereum mainnet and L2 protocols, including Liquid Restaking and AMM-based money markets.
• Expertise in Solidity, Foundry, Hardhat, and security tools (Slither, Echidna) with hands-on experience in proxy patterns, ERC-20/ERC-4626 standards, and upgradeable vault architectures.
• Proficient in backend development using Node.js, TypeScript, Python, and subgraphs (The Graph) to enhance protocol UX and operational efficiency.
• Implemented CI/CD pipelines with Tenderly, CircleCI, and GitHub Actions, reducing contract failure rates by 40% and withdrawal processing time from 20 to 1 day.

• Blockchain Engineer with 2+ years specializing in Solidity smart contracts, LayerZero V2 omnichain tokens, and multi-chain DEX routers on Ethereum, BSC, and Polygon.
• Proficient in full-stack dApp development using React, TypeScript, Wagmi, and Web3 libraries, integrating secure backend APIs with Python/Django.
• Expertise in secure contract patterns including ReentrancyGuard, Ownable2Step, and Pausable, delivering production-grade decentralized applications.
• Strong foundation in system design, API security, and cross-chain protocol engineering demonstrated through complex projects like omnichain fungible tokens and decentralized wallets.

• 7 years of specialized experience in blockchain development, focusing on DeFi protocol design, security tokens, NFT marketplaces, and Web3 wallets.
• Proficient in Solidity (4 years), Go, Typescript, JavaScript, and Java, with hands-on expertise in Forge, Hardhat, Truffle, and Foundry Fuzz for smart contract development and security analysis.
• Led end-to-end projects including a Hyperledger private blockchain handling $3M+ remittance inflows and a real estate tokenization system reducing property transfer time to under 1 day.
• Skilled in integrating blockchain with backend services and frontend.
• I have a strong foundation in blockchain security research and development methodologies.

• 5.5+ years engineering high-load B2B/B2C platforms in AdTech, fintech, blockchain, and real-time communications, specializing in backend and full stack development.
• Expertise in Python, JavaScript/TypeScript, Django, React, PostgreSQL, Redis, Docker, AWS, and Azure, with proven impact: 109k query reduction, 92% latency cut, and 60 FPS UI performance.
• Skilled in SDLC ownership, architectural refactoring, multi-tenant SSO, microservices, and CI/CD pipelines using GitHub Actions.

• Proficient in full-stack development with expertise in Flutter, .NET, Solidity, and blockchain technologies, delivering robust and scalable solutions.
• Demonstrated leadership in managing projects and teams, including roles as Project Development Manager and Senior Developer.
• Experienced in SDLC best practices, software architecture, and cross-platform development, with a strong focus on Web3 and blockchain integration.
• Proven track record in freelance and corporate environments, contributing to diverse projects across Brazil and Canada.

Built and deployed multiple high-performance Telegram bots for automation, e-commerce, and customer support, improving efficiency and user engagement. Successfully integrated payment systems and third-party APIs, ensured reliable uptime, and optimized bot performance for real-time interactions.

• Full-Stack Developer with 5+ years of experience specializing in React, Next.js, Nest.js, and Golang for scalable web and crypto-rewards platforms.
• Proven expertise in building high-performance GraphQL APIs, optimizing backend systems, and integrating Web3 wallets and AWS S3 for secure data management.
• Skilled in Agile methodologies, CI/CD automation using GitHub Actions and Azure, enhancing deployment speed by up to 40%.

• Blockchain integration across EVM and Solana networks, including real-time token swaps, wallet management, and secure transaction processing.
• Proficient in designing optimized PostgreSQL schemas and implementing microservices with asynchronous processing for high-throughput financial systems.
• Master’s degree in Computer Science underpinning solid engineering principles, API design, and agile delivery within cross-functional international teams.

• Expertise in zero-knowledge proof systems including ZK-SNARK, Plonk, Groth16, and zkVM optimization for Layer 2 privacy solutions.
• Proficient in Rust blockchain development, designing high-performance node components, consensus algorithms, and secure cryptographic primitives.
• Skilled in cloud-native infrastructure automation using Kubernetes, Terraform, CI/CD, and observability with Prometheus and Grafana ensuring 99.9% uptime.
• Hands-on experience with decentralized network protocols, peer-to-peer systems using libp2p, and distributed storage architectures.
• Strong quantitative finance background with MSc in progress, combining advanced cryptography, blockchain protocols, and privacy computing expertise.

• Senior Software Engineer with 10+ years of expertise in scalable web applications and distributed systems using JavaScript, TypeScript, React.js, Node.js, and Python.
• Proven leadership in transitioning to event-sourcing architectures, achieving 39× faster read query performance and enhancing system scalability.
• Extensive experience in microservices, REST API development, and database optimization with MongoDB and PostgreSQL for high-performance applications.
• Skilled in integrating AI-powered development tools like Claude Code and Cursor IDE to boost engineering productivity and innovation.
• Strong background in full software development lifecycle, team mentoring, and delivering complex solutions across diverse domains including industrial monitoring, telecommunication, and asset trading.

• Senior Frontend Engineer with 6+ years of expertise in React.js, Next.js, TypeScript, and modern frontend architectures, delivering high-performance trading interfaces and blockchain-enabled applications.
• Proficient in state management (Redux Toolkit, MobX), UI frameworks (Tailwind CSS, Material UI), and Web3 integrations including wallet connections and smart contract interactions.
• Led development of scalable crypto exchange platforms with real-time data processing, multi-currency wallet management, and KYC/AML compliance workflows.
• Experienced in Agile methodologies, CI/CD pipelines, and test-driven development using Jest, React Testing Library, and Cypress to ensure robust, maintainable codebases.
• Holds a Bachelor's degree in Information Technologies, with strong skills in backend (Node.js, NestJS), databases (MongoDB, PostgreSQL), and cloud DevOps (Docker, AWS, Azure).

• Proficient in TypeScript and Node.js with hands-on experience in building scalable backend systems and real-time integrations using Bun runtime.
• Developed a multi-account Discord-to-Telegram message bridge featuring modular dependency injection, GPT-4o-mini translation, advanced content filtering, and robust proxy/captcha handling with MongoDB persistence.
• Skilled in Telegram bot development using Telegraf and node-canvas, implementing multiplayer game logic and dynamic graphical rendering.
• Experienced with REST APIs, WebSockets, OpenAI API integrations, and complex asynchronous workflows emphasizing clean, maintainable code architecture.
• Self-taught with a strong focus on practical software engineering principles, modular design patterns, and delivering client-ready solutions under tight deadlines.