Hire Vetted Blockchain Engineers at Upstaff

• Ranked among the Top 10 local freelance Python engineers at the age of 17.
• Contributed to projects with a multi-million user base, focusing on backend scalability and production stability.
• Successfully launched and supported a USA educational platform used by students, tutors, and academic institutions.
• Represented the development team at the international Wefi Beyond Banking Summit, presenting a fintech product to a global audience.
• Built and maintained production-grade backend systems, automation tools, Telegram bots, and API integrations for fintech, crypto, payments, and business operations.

• Senior FullStack Engineer with 6+ years of experience delivering scalable web applications in healthcare, eCommerce, marketplaces, and Web3 domains.
• Proficient in React.js, Next.js, TypeScript, Node.js, PostgreSQL, GraphQL, REST APIs, and Web3 integrations including Wagmi and Viem.
• 3+ years on blockchain/Web3 projects: Expertise in building complex features such as crypto payment platforms, NFT marketplaces, multi-chain token launchpads, and real-time healthcare scheduling systems.

• Software engineer with 6+ years in backend/fullstack development (Node.js, TypeScript, microservices), specializing in serverless architectures
• Domain expertise in Travel/Vacations and Payment/Banking systems, currently working at Guesty (data distribution channel management, Booking integrations, payment APIs)
• Built scalable distributed systems with AWS Lambda, Kubernetes, MongoDB, Kafka/RabbitMQ; aware of serverless limitations (compliance, DB coupling, cost)
• Experience with Java, Rust, Solidity; delivered MVPs quickly (Next.js, MongoDB) and onboarded clients efficiently

• Front-end JavaScript Engineer with 9 years of commercial experience;
• 8+ years of hands-on experience with React, and TypeScript, including complex component architectures, shared UI libraries, and micro-frontend approaches using Module Federation;
• Experience with automated testing, covering unit, integration, and end-to-end tests using Jest, React Testing Library, Cypress, and Playwright;
• Experience with Next.js, focusing on performance optimization, scalability, and modular application design;
• Expertise in Web3 and blockchain integrations, including crypto wallets, on-chain data, and decentralized authentication;
• Background in FinTech and crypto products, delivering secure, user-facing interfaces for wallets, cards, and transaction flows;
• Experience working and leading within distributed Agile teams, collaborating closely with backend, security, and product stakeholders.

Software engineer with experience in fintech and Web3. Built production-ready applications with cryptocurrency exchange integrations to collect and analyze market data. Familiar with both Ethereum or Solana ecosystems and the best security practices.

• Backend developer with 4+ years of experience specializing in Golang, SQL, Docker, and cloud-native solutions on AWS and GCP.
• Proven expertise in designing and implementing scalable backend services, SDKs, and cross-cloud integrations with database-level synchronization (pglogical).
• Strong background in blockchain technologies, microservices, and smart contract development using Solidity, Rust, and Typescript.
• Skilled in observability tools (Prometheus, Grafana), authentication mechanisms (JWT, 2FA).
• Holds Bachelor's and Master's degrees in Cybersecurity, combining solid computer science education with practical software development and DevOps practices.

I am a senior software architect and blockchain automation engineer , with over 20 years of professional development experience and 4+ years dedicated to crypto, trading bots, WebSocket systems, and SaaS automation platforms.

My career spans enterprise systems, mobile applications, cloud analytics, authentication infrastructure, and large-scale data platforms — evolving into high-performance blockchain automation and bot engineering across Solana and Ethereum ecosystems.

I specialize in building:

• Real-time token tracking systems
• Telegram trading bots
• Solana Token Bundling, Deployment and tracking platforms,
• Rug detection & dev-sell intelligence
• MongoDB-driven analytics platforms
• Event-driven SaaS backends

All systems are designed for 24/7 uptime, restart persistence, and real trader usage — not prototypes.

Core Expertise

Blockchain & Crypto

• Solana Web3.js
• Ethereum (EVM)
• Pump.fun SDK
• Token metadata indexing
• Market cap & liquidity tracking
• Dev-sell detection
• Rugpull analysis
• ATH / ROI analytics
• Wallet behavior monitoring

Bot & Automation Systems

• Trading bots
• Token sniper trackers
• Telegram bots
• Volume simulation bots
• Alert engines
• Subscription lifecycle managers

Real-time ranking systems

• Backend & Protocol Engineering: 7+ years building large-scale, high-performance consensus-layer systems in Go and C++.
• Scalable Data Architecture: Architected high-load EVM indexers, delivering sub-second analytics over 100M+ rows with real-time streaming via REST, gRPC, and SSE.
• Cryptography: Developed ZK circuits (gnark) and secure distributed signing nodes (MPC) using advanced primitives like BLS and ECDSA.
• Network Optimization: Optimized consensus protocols (CasperFFG, LMD-GHOST) and libp2p networking, scaling production networks with up to $2B in market cap.
• Systems Foundation: B.Sc. in Informatics & Applied Mathematics with deep expertise in LLVM and compiler-level optimization.

• Proficient in TypeScript, JavaScript, Python, SQL (PostgreSQL/Plpg SQL), with extensive backend and full-stack development experience using Supabase, PostgreSQL, and REST APIs.
• Developed and maintained complex systems including travel pricing platforms, contract management, and crypto investment dashboards, demonstrating strong database schema design and server-side logic implementation.
• Expertise in bot development with Twilio and WhatsApp Business API, and Python Telegram bots featuring automated scheduling and persistence.
• Skilled in frontend frameworks Vue.js, React, Next.js, and responsive UI design, with deployment experience on Vercel
• Applied SEO optimization

• 24 years of expertise in full-stack development and enterprise architecture, specializing in Java, SpringBoot, Angular, and microservices.
• Architected high-performance systems including SOLR-based enterprise search
• Proficient in blockchain development with Rust/TypeScript for Solana, building high-frequency trading bots and automation tools.
• Skilled in containerization, Kubernetes orchestration, and CI/CD pipelines with Jenkins and Docker to enhance deployment reliability.
• Experienced in designing scalable cloud-native architectures integrating OAuth2, Keycloak, and advanced middleware for secure authentication and seamless system integration.

• Over 20 years of experience in IT infrastructure engineering, specializing in Microsoft
• Proven expertise in managing large-scale infrastructure projects supporting, including cross-domain migrations and modernization initiatives.
• Microsoft Azure and Microsoft 365 certified professional with advanced skills in Azure Solutions Architecture, Identity and Access Management, and Endpoint Administration.
• Strong background in scripting and automation, delivering multi-level PowerShell solutions to optimize administrative processes and enhance system reliability.

• Backend engineer with expertise in NestJS, Node.js, and TypeScript, specializing in building secure, scalable REST APIs and auth systems
• Proven experience in Web3 integrations, smart contract auditing on Celo, and blockchain technologies including Solana, Farcaster SDK
• Skilled in container orchestration and infrastructure automation using Docker SDK, docker compose, and Caddy for zero-downtime deployments.
• Developed AI-powered platforms leveraging Google Gemini and Elasticsearch for real-time payment reconciliation and natural language query parsing into SQL.
• Strong focus on clean architecture, security best practices, and system design demonstrated through multiple end-to-end projects.

• Lead Blockchain Engineer with 6+ years in software engineering and 5+ years specializing in Solidity and DeFi protocol architecture on EVM-compatible chains.
• Expertise in designing and deploying upgradeable DeFi vaults (ERC-4626), AMMs, DEXs, order-book trading systems, and yield-farming automation.
• Proficient with Hardhat, Foundry, OpenZeppelin, Slither, Chainlink oracles, ethers.js, and Web3.js for secure, gas-optimized smart contract development and audits.
• Experienced in leading distributed teams, enforcing protocol security strategies, and coordinating multi-disciplinary engineering workflows for production-grade blockchain solutions.

• Senior Software Engineer with 5+ years in frontend and full stack development, specializing in Next.js, Angular, and scalable architectures for Web3 and AI-driven platforms.
• Proven expertise in blockchain integrations, real-time systems, and API design, delivering features like automated on-chain actions and wallet-based authentication.
• Strong backend skills with FastAPI, Python, PHP, and database optimization (PostgreSQL, SQLite), improving performance and reducing errors by up to 25%.
• Experienced in mobile app development using Ionic and Cordova, enhancing user engagement and offline functionality for global clients.

• Senior JS Full-Stack Engineer with 6+ years, delivering scalable fintech, Web3, and SaaS applications.
• Expertise in designing and optimizing REST APIs, microservices, and database schemas using PostgreSQL, MongoDB, and Redis, improving response times by up to 40%.
• Proven track record in cloud-native deployments on AWS with Docker and CI/CD pipelines, achieving 95%+ automated test coverage and low defect rates.
• Strong focus on clean architecture, performance optimization, and scalable system design demonstrated through complex projects like decentralized email platforms and real-time cryptocurrency analytics.
• Applying best practices in automated testing and collaborative code reviews.

• Blockchain & Full Stack Engineer with 7+ years of experience specializing in Solidity smart contract development, DeFi infrastructure, and scalable Web3 applications using Foundry, Hardhat, and OpenZeppelin.
• Proficient in frontend and backend technologies including React, React Native, TypeScript, Node.js, Ruby on Rails, and PostgreSQL, secure fintech and decentralized platforms.
• Expertise in smart contract security analysis and testing methodologies such as fuzz testing, invariant testing, and static analysis tools like Slither and Aderyn.
• Strong foundation in mathematics and computer science, supported by formal education and continuous blockchain security training.

• Senior Full Stack Engineer with 5+ years in fintech, specializing in React, Ruby on Rails, Node.js, and PostgreSQL for scalable payment and financial platforms.
• Expertise in integrating banking systems, blockchain services, Binance APIs, and building secure authentication and real-time features.
• Proficient in frontend architecture using React, TypeScript, Redux, TailwindCSS, and backend RESTful APIs with Express.js and Sequelize.
• Experienced in developing DeFi infrastructure, Web3 interfaces, and implementing robust testing workflows to enhance platform stability.

• Blockchain Engineer with 3+ years of experience in DeFi, smart contracts, and Web3 full stack development using Solidity, Foundry, React, TypeScript, wagmi, and viem.
• Skilled in secure smart contract development, fuzz testing, invariant testing, mainnet fork testing, and static analysis with Slither and Aderyn.
• Built scalable DeFi governance, vault, treasury, NFT, and subscription-based blockchain systems, plus fintech payment infrastructures integrating Binance APIs and microservices.
• Experienced with ERC20, ERC721, and ERC4626 standards, decentralized voting systems, and full stack development using Node.js, Express, React, and REST APIs.

• Blockchain & Full Stack Engineer with 4+ years of experience developing DeFi systems, smart contracts, and scalable Web3 infrastructure using Solidity, Foundry, Hardhat, and Ethereum.
• Proficient in frontend and backend technologies including React, React Native, Node.js, Ruby on Rails, TypeScript, and PostgreSQL, integrated fintech and decentralized applications.
• Expertise in smart contract security, testing methodologies (fuzz, invariant, stateful), and security tools like Slither and Aderyn, ensuring robust and secure protocol development.
• Hands-on experience building governance systems, treasury management, NFT platforms, and payment integrations with financial APIs and blockchain wallets.

• Blockchain engineer with 3+ years in Solidity smart contract development, DeFi protocol architecture, and secure decentralized applications using Foundry, Hardhat, and Slither.
• Proficient in full stack Web3 development with React, TypeScript, wagmi, viem, and RainbowKit for seamless wallet integrations and user flows.
• Experienced in building financial and NFT platforms integrating ERC20/ERC721 standards, Chainlink oracles, and IPFS for decentralized data storage.
• Strong background in mathematics and computer science education
• Skilled in rigorous testing methodologies including fuzz, invariant, and stateful testing to ensure smart contract security and protocol reliability.

• Software engineer with strong foundation in Computer Science and Engineering (AI & Robotics specialization) from Vellore Institute of Technology, CGPA 9.05/10.
• Proficient in Java, Solidity, Python, Rust, Go, and JavaScript; experienced in blockchain development, distributed systems, and financial transaction modules.
• Led zero-downtime Oracle to PostgreSQL migration, cutting costs by $500K+ annually and boosting system performance by 73%.
• Developed blockchain-based decentralized crowdfunding and immutable legal records platforms, recognized in top 10 at Smart India Hackathon 2023.
• Skilled in CI/CD, automated testing (Selenium), and security operations, ensuring robust, scalable software delivery.

• Senior Blockchain Developer with 5+ years designing and deploying smart contracts on Ethereum, EVM-compatible chains, and Solana using Solidity and Rust.
• Expertise in full-stack DApp development, integrating Web3 libraries (Ethers.js, Web3.js), wallet SDKs, and event-driven backend architectures.
• Proven track record optimizing gas costs, securing contracts with reentrancy guards and access control, and conducting internal audits to ensure robust security.
• Skilled in cross-chain token bridges, DeFi protocol design, and real-time systems handling.
• Strong background in Node.js, TypeScript, React, Next.js, REST/GraphQL APIs, Agile methodologies, and CI/CD pipelines.

• Expertise in designing upgradeable smart contracts using the diamond pattern and UUPS proxies, managing 180k+ NFTs, and securing $2M+ in tokens with gas-optimized staking and vesting contracts.
• Proficient in Go, TypeScript, and Solidity, developing backend services, TypeScript SDKs, and cross-chain token bridges (Polygon, Ethereum, Base, Solana).
• Skilled in integrating Uniswap V3 oracles, building metatransaction flows, and automating multisig treasury operations with Node CLI tooling.
• Strong background in blockchain security, performing audits, vulnerability analysis with MythX and Slither, and implementing best practices before mainnet releases.

Senior Blockchain Developer with 5+ years leading multi-chain DeFi, RWA tokenization, and cross-chain protocol projects using Solidity, Rust, and Node.js.Expertise in architecting scalable systems like AlphaSwap DEX, LayerZero-based cross-chain lottery, and Cosmos-based Alphachain with IBC integration.Skilled in ERC-3643 token standards, Chainlink oracles, multi-signature security, and gas-optimized smart contract design.

• Over 2 years of expertise in blockchain development, specializing in Solidity, Rust, and smart contract security auditing across 150+ networks including Ethereum and Layer 2 chains.
• Experienced in full-stack development using TypeScript, Node.js, React.js, and cloud technologies, with strong command of testing frameworks like Hardhat, Foundry, and static analysis tools.
• Engineering background with a Bachelor’s degree in Electrical Engineering and advanced training in smart contract hacking and Solidity development, emphasizing secure, scalable, and maintainable code architectures.

Senior Smart Contract Engineer with 3+ years shipping DeFi, NFT, and ICO/TGE platforms across Ethereum, Polygon, BSC, and Base. Expert in Solidity, Hardhat, Foundry, ethers.js, and Viem — 200,000+ users served, 95%+ test coverage, zero critical vulnerabilities.

Solidity, Ethers.js, Viem, Hardhat, Foundry, Slither, OpenZeppelin, UUPS Proxy, ERC-20/721/1155, Chainlink, ECDSA, Node.js, TypeScript, React.js, The Graph, AWS, Git, Ethereum, Polygon, BSC, Base

• Senior Software Engineer with 9+ years specializing in blockchain wallet development, SDK integrations, and scalable cloud-native systems.
• Key contributor to Lace Wallet at Input Output Group, enhancing Cardano wallet features, transaction reliability, and integrating privacy-preserving ZKP blockchain (Midnight).
• Proficient in TypeScript, React, Node.js, PostgreSQL, Redis, GraphQL, Docker, AWS, and Solidity, with strong expertise in refactoring legacy code and increasing test coverage.
• Holds MSc in Computer Science, with proven ability to collaborate with cryptography and protocol teams to deliver secure, spec-compliant blockchain solutions.