Upstaff Developer Profile Directory

• 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 full-stack engineer with 6+ years of experience delivering scalable B2B platforms using React, Node.js, and SQL (PostgreSQL/MySQL).
• Expertise in designing and optimizing REST and GraphQL APIs with OAuth 2.0 authentication, improving backend response times by up to 40%.
• Proficient in deploying micro-applications on Google Cloud Platform (Cloud Run, Cloud SQL) ensuring 99.9% uptime and automated scaling.
• Strong background in computer science with Master’s and Bachelor’s degrees from University of Belgrade.
• Skilled in CI/CD automation, webhook integrations, and resolving critical production issues, reducing release cycles by 30% and support tickets by 25%.

• 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.

• AI Automation Engineer and Full Stack Developer with 5+ years delivering 50+ AI-powered SaaS platforms and automation pipelines for international clients.
• Expertise in Python, JavaScript (React.js, Vue.js, Next.js, Node.js), FastAPI, and cloud deployment on AWS, Azure, DigitalOcean with CI/CD and Infrastructure as Code.
• Proficient in integrating OpenAI API, LangChain, LangGraph for multi-agent intelligent workflows and building scalable RESTful APIs and microservices.
• Skilled in automation tools n8n, Zapier, and developing AI voice/caller agents, WhatsApp and Telegram bots to optimize business operations and reduce manual effort by up to 80%.

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.

• 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.

• Senior Java Developer with 9+ years of expertise in Java (up to v21), specializing in scalable, modular backend architectures for cybersecurity, banking, and automotive sectors.
• Certified Adobe Experience Manager Sites Developer with advanced skills in AEM as a Cloud Service, Spring Boot, RESTful APIs, OAuth 2.0, and automated data migration using Groovy.
• Proven ability to design secure OAuth 2.0 authentication services, integrate enterprise CRM systems, and implement observability with Elasticsearch and Kibana.
• Experienced in Agile Scrum environments, CI/CD pipelines (Jenkins, Adobe Cloud Manager), and code quality assurance using SonarQube and JUnit testing frameworks.

• Backend and Platform Engineer with 7+ years of experience in fintech, cloud platforms, and event ticketing, specializing in scalable payment systems and compliance workflows (KYC/KYB/KYT).
• Proficient in Go, Python, JavaScript, Kafka, RabbitMQ, and AWS services, with expertise in CI/CD automation, containerization (Docker, Kubernetes), and Linux infrastructure.
• Led critical migrations including Linux VM to Kubernetes, and Jenkins to GitLab CI, achieving zero downtime and improved deployment efficiency.
• Developed multi-tenant SaaS products reducing client go-live time from 1 year to 2 months, and implemented idempotent payment processing to prevent double spending.

• 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.

• AI/ML Engineer with 3.5 years of experience specializing in Python, FastAPI, PyTorch, TensorFlow, and OpenCV for developing real-time AI solutions including video avatars, hotel monitoring, and social media automation.
• Proficient in asynchronous programming, API integration, CI/CD pipelines (GitHub Actions), and cloud deployment on AWS, ensuring scalable and efficient back-end systems.
• Expertise in LLM prompt chain algorithms, multi-source data scraping, and AI-driven analytics for business intelligence and sales optimization.
• Holds a Bachelor’s degree in Computer Science and certified in Practical Deep Learning with PyTorch and SQL for Data Science

• Full-Stack Developer with 3 years of experience specializing in Python (FastAPI, Flask), Java (Spring Boot with Hibernate), and modern JavaScript frameworks (React, Next.js), delivering scalable web applications and microservices.
• Proficient in API integrations, real-time communication (WebSockets, SSE), and cloud-native development using Docker, AWS, and CI/CD pipelines with GitHub Actions.
• Hands-on expertise in RDBMS (PostgreSQL, MySQL), NoSQL (MongoDB, Redis), and advanced front-end state management (Redux, Redux-Saga, RTK Query) with UI/UX optimization and performance tuning.

• 3.5 years of full-stack development experience specializing in Python (FastAPI, Django, DRF, Flask) and React.js with TypeScript for frontend.
• Proficient in asynchronous programming, OOP principles, unit testing, CI/CD pipelines (GitHub Actions), and Agile methodologies (Scrum, Kanban).
• Developed AI-integrated web applications in legal and healthcare domains, handling complex file processing and AI-driven features.
• Skilled in RDBMS (PostgreSQL, MySQL), NoSQL (Redis, Firestore), Docker, cloud platforms (AWS, GCP), and technical documentation.
• Experienced in SDLC from architecture to deployment, code reviews, refactoring, and collaborative team environments.

• 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.

PHP, JavaScript, WordPress development, Gutenberg, API, integrations, technical SEO optimization, pixel perfect

• Back-End Developer and DevOps Engineer with 4.5 years of experience in designing and developing scalable backend systems using Python (Django, DRF, FastAPI) and deploying on AWS with Docker, Kubernetes, and Helm.
• Proficient in implementing secure, role-based access control and optimizing database schemas across RDBMS (PostgreSQL, MySQL) and NoSQL (Elasticsearch, Redis) environments.
• Experienced in Agile methodologies, test-driven development, and applying design patterns (Factory, Strategy) to maintain clean, modular codebases in healthcare and government domains.

• AI/ML Engineer and Backend Developer with 4 years of experience in designing RAG-based chatbots, AI agents, and automated workflows using Python, FastAPI, Flask, and SQL/NoSQL databases.
• Expertise in integrating LLMs (GPT, Claude, LLaMa) with vector search technologies (Pinecone, ChromaDB) and enterprise tools like Salesforce and Google Workspace for real-time communication and lead generation.
• Proficient in software architecture design, prompt engineering, and building scalable AI systems with robust error handling and workflow automation using n8n and Zapier.