Senior Software Engineer with a strong foundation in full-stack Web3 engineering, now focused on building AI-native applications, AI agents, and LLM-powered automation systems. My background started with blockchain, DeFi, smart contracts, and full-stack product development, and has evolved into AI architecture, LLM integration, agentic workflows, and intelligent software systems. Experienced in designing and delivering scalable applications using React, Next.js, Node.js, TypeScript, GraphQL, PostgreSQL, Supabase, and cloud-based infrastructure. Strong hands-on experience with Web3 platforms, smart contract integrations, wallet-based applications, DeFi systems, and blockchain data workflows. Currently focused on AI agent development and LLM orchestration, including OpenAI API, Anthropic Claude API, Claude AI, AWS Bedrock, LangChain, MCP, RAG pipelines, prompt engineering, tool-calling agents, workflow automation, and AI-powered backend systems. Skilled at connecting AI models with real business workflows, databases, APIs, blockchain data, and user-facing applications. My recent work includes STXAI, an AI-powered multi-chain token launchpad and trading intelligence platform that combines AI, blockchain analytics, real-time market data, wallet tracking, smart-money monitoring, and full-stack Web development. This project reflects my current direction: combining AI agents, LLMs, Web3 infrastructure, and scalable software architecture into practical products. I bring both technical depth and product-level thinking, with the ability to architect systems, guide engineering decisions, integrate modern AI tools, and deliver production-ready software. I’m especially interested in projects involving AI agents, LLM applications, workflow automation, AWS Bedrock, Anthropic Claude, OpenAI, MCP, Supabase, and blockchain-enabled intelligence platforms.

⭐⭐⭐⭐⭐ 𝗘𝗵𝘁𝗮𝘀𝗵𝗮𝗺 𝗶𝘀 𝗼𝗻𝗲 𝗼𝗳 𝘁𝗵𝗲 𝗯𝗲𝘀𝘁 𝗽𝗲𝗼𝗽𝗹𝗲 𝗜 𝗵𝗮𝘃𝗲 𝘄𝗼𝗿𝗸𝗲𝗱 𝘄𝗶𝘁𝗵 𝗼𝗻 𝘁𝗵𝗶𝘀 𝗽𝗹𝗮𝘁𝗳𝗼𝗿𝗺. We had very custom, very complex needs for a crypto trading execution system, and Ehtasham went above and beyond to make sure we had a first-rate product to use. I intend to work with him again! 🚀𝗦𝗲𝗻𝗶𝗼𝗿 𝗦𝗼𝗹𝗮𝗻𝗮 & 𝗘𝗩𝗠 𝗕𝗹𝗼𝗰𝗸𝗰𝗵𝗮𝗶𝗻 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 | 𝗥𝘂𝘀𝘁 & 𝗦𝗼𝗹𝗶𝗱𝗶𝘁𝘆 𝗦𝗺𝗮𝗿𝘁 𝗖𝗼𝗻𝘁𝗿𝗮𝗰𝘁 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿 | 𝗗𝗲𝗙𝗶, 𝗥𝗮𝘆𝗱𝗶𝘂𝗺 & 𝗣𝘂𝗺𝗽𝗙𝘂𝗻 𝗦𝗽𝗲𝗰𝗶𝗮𝗹𝗶𝘀𝘁 I'm a blockchain developer with hands-on delivery across EVM chains (Ethereum, BSC, Polygon, Base) and Solana, with 794+ hours logged on Upwork and a 100% Job Success Score. I write smart contracts in Solidity and Rust, build Web3 frontends (React + ethers.js / web3.js), and handle end-to-end token launches, staking systems, and NFT minting platforms. 🛠 𝗖𝗼𝗿𝗲 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 🔹 Solana Development (Rust / Anchor) SPL tokens, tokenomics, minting programs Anchor framework: PDAs, CPI, upgradeable programs DeFi protocols: AMMs, lending, flash loans, staking, governance High-performance bots & automation on Solana 🔹 𝗘𝗩𝗠 & 𝗦𝗼𝗹𝗶𝗱𝗶𝘁𝘆 𝗦𝗺𝗮𝗿𝘁 𝗖𝗼𝗻𝘁𝗿𝗮𝗰𝘁𝘀 ERC-20, ERC-721, ERC-1155 tokens (fungible, NFT, multi-token) DeFi contracts: DEXs, liquidity pools, staking, yield farming Governance modules, DAO frameworks, cross-chain bridges Security-focused coding: reentrancy protection, gas optimization 🔹 𝗕𝗼𝘁𝘀 & 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻 Arbitrage & MEV bots (low latency, optimized for speed) Volume bots, liquidity management, automated market-making Custom trading scripts for Solana & EVM ecosystems 🔹𝗘𝗰𝗼𝘀𝘆𝘀𝘁𝗲𝗺 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻𝘀 Solana: Raydium, PumpFun, Jupiter, Serum, Orca EVM: Uniswap, PancakeSwap, SushiSwap, Curve, Aave, Compound Swap routing, cross-protocol automation, liquidity optimization 🔹𝗣𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲 & 𝗢𝗽𝘁𝗶𝗺𝗶𝘇𝗮𝘁𝗶𝗼𝗻 Compute unit & parallelism optimization for Solana Gas efficiency & cost reduction for Solidity contracts Benchmarking, stress testing & profiling for high-load systems 🔹 𝗜𝗻𝗳𝗿𝗮𝘀𝘁𝗿𝘂𝗰𝘁𝘂𝗿𝗲 & 𝗗𝗲𝘃𝗢𝗽𝘀 Validator & RPC node setup/maintenance Docker, Kubernetes, CI/CD pipelines for blockchain apps Monitoring & observability with Prometheus, Grafana 🔹 𝗗𝗮𝘁𝗮𝗯𝗮𝘀𝗲𝘀 & 𝗗𝗲𝗰𝗲𝗻𝘁𝗿𝗮𝗹𝗶𝘇𝗲𝗱 𝗦𝘁𝗼𝗿𝗮𝗴𝗲 PostgreSQL, MongoDB, Redis IPFS, Arweave — for decentralized & permanent storage ✅ 𝗪𝗵𝘆 𝗖𝗵𝗼𝗼𝘀𝗲 𝗠𝗲 ✔ Deep dual expertise: Rust (Solana) + Solidity (EVM) ✔ End-to-end blockchain solutions (DeFi, NFTs, bots, cross-chain apps) ✔ Strong focus on security, performance & scalability ✔ Clean, well-documented, and maintainable code ✔ Transparent communication & milestone-based delivery. 𝗛𝗼𝘄 𝗱𝗼 𝘄𝗲 𝗰𝗼𝗺𝗺𝘂𝗻𝗶𝗰𝗮𝘁𝗲 𝗮𝗻𝗱 𝗿𝗲𝗽𝗼𝗿𝘁? We always prefer to keep our work transparent, and for this reason, we like to be in touch with our valued clients on a daily, weekly & monthly basis. ✅ Upwork Message Board ✅ JIRA ✅ Azure DevOps Server ✅ Asana ✅ Trello ✅ Zoho Projects 𝗢𝗿 𝗪𝗵𝗮𝘁𝗲𝘃𝗲𝗿 𝗖𝗵𝗮𝗻𝗻𝗲𝗹 𝗬𝗼𝘂 𝗪𝗮𝗻𝘁. 𝐋𝐞𝐭'𝐬 𝐜𝐨𝐥𝐥𝐚𝐛𝐨𝐫𝐚𝐭𝐞 𝐟𝐨𝐫 𝐲𝐨𝐮𝐫 𝐛𝐥𝐨𝐜𝐤𝐜𝐡𝐚𝐢𝐧 𝐧𝐞𝐞𝐝𝐬! ----------------------------------------------------------------------------------------------------------------- #JavaScript, #ReactJS, #NodeJS, #ECMAScript, #WebAssembly, #C++, #Rust, #Solidity, #Erlang, #Dart, #Golang for programming, coupled with #GraphQL, #PostgreSQL, #LevelDB, #RocksDB for databases, and #PlayCanvas, #WebXR for immersive experiences. Proficient in #BlockchainProtocols, #SmartContracts, #CEX, #DEX, #DeFi, #NFTs, #GameFi, while leveraging #AWS, #Serverless, #Docker, #Kubernetes, #Monitoring tools like #Sentry, #Datadog, and #DevOps practices. Expertise spans numerous blockchain ecosystems including #Bitcoin, #Ethereum, #BinanceSmartChain, #Cardano, #Avalanche, #Solana, #Rust #Polkadot, # Polygon, #All EVM EVM-based blockchains among others, and development tools like #OpenZeppelinTruffle, #Web3js, #Infura for seamless blockchain application deployment and management." EVM blockchains ( Ethereum, Polygon and Binance) EVM blockchains ( Ethereum, Polygon and Binance ), pump.fun.

I do not just write code; I diagnose business bottlenecks and architect AI-driven systems that solve them. Most businesses are stuck using "Standard Software" and legacy tools. I help founders and enterprise teams transition to "AI-Native Software," cutting operational costs and accelerating time-to-market. Whether you need a high-level technical consultation, a custom RAG pipeline, or a fully automated agentic workflow, I build for scale from Day 1. How I Drive Value: Strategic Consulting: I advise businesses on where AI can actually generate ROI, avoiding hype and focusing on practical, scalable architecture. Rapid Development: By utilizing AI-augmented coding workflows, I build complex applications significantly faster than traditional development cycles. Robust Architecture: I design secure, cloud-ready systems using AWS, ensuring your product doesn't break when your user base grows. Core Technical Stack: AI & Agents: OpenAI, Anthropic (Claude), LangChain, Vector Databases (RAG). Backend & Systems: Python, FastAPI, Django, WebSockets. Frontend: React, Next.js, TypeScript. Cloud Infrastructure: AWS, Docker, CI/CD pipelines. I maintain a 100% Job Success Score because I prioritize transparent communication, reliable delivery, and systems that work exactly as promised. Let’s get on a call to map out the architecture for your next build.

A skilled software developer, on various platforms ranging from Windows to Linux to ARM and other embedded devices (AVR, PIC, etc). My preferred programming languages include, but are not limited to: - C/C++ - Java - Python - Rust - C# - Matlab I'm familiar with various open source libraries in different programming languages such as STL, Curl, Json, GTK, Swing, BeautifulSoup, Requests, Selenium, Tkinter, and many more... I've experience in Embedded Software using various microcontrollers (AVR, PIC, STM32, TM4C123, etc...). I've used many peripherals such as (GPIO, Timer, PWM, NVIC, RCC, FPEC, UART, SPI, I2C, CAN, ADC,...), interfaced it with many sensors and actuators. I've built many projects ranging from simple projects (blinking LEDs, motor control, calculator, stop watch, ...) to more advanced projects (Bootloader, Smart Home, Digital Clock, ...). I have a strong background about Algorithms and Data Structures such as: - Dynamic Programming - Backtracking - Graphs - DFS - BFS - MST - Heap - Trie - Balanced BSTs - Segment Trees - Disjoint Set - and many more... I've solved +370 DSA problems on HackerRank platform and got ranked 660 over 23 million developers in solving coding challenges. You can find my profile in the portfolio. My primary focus in writing software is performance, without sacrificing the safety and security of the application. I will do my best to discuss all the relevant details and the scope of the project with the client, so that I can form an idea of the finished product in order to be able to lay a better groundwork design for the project.

I am an experienced blockchain developer with a strong background in developing decentralized applications(dApp) and smart contracts on various blockchain platforms such as EVM(Ethereum, Arbitrum, Binance, Base, Polygon etc), Solana and others. I am proficient in Solidity and Rust, the programming language for Ethereum and Solana smart contracts, and have a deep understanding of blockchain technology and its applications. Skills: - Proficient in smart contract development using Solidity and Rust - Experience with EVM(Ethereum, Arbitrum, Binance, Base, Polygon etc), Solana and other blockchain platforms - Knowledge of blockchain consensus algorithms and protocols - Understanding of Decentralized Finance(DeFi), Crypto Lending/Borrowing, LSD Finance and non-fungible tokens (NFTs) - Familiarity with blockchain development tools and frameworks - Strong understanding of cryptography and security principles in blockchain development Work Experience: - Developed and deployed smart contracts for various decentralized applications on the Ethereum and Solanan blockchain - Conducted code reviews and performed security audits to ensure the reliability and security of smart contracts and dApps - Forked famous many dApps ⚡️ Uniswap V2, V3 (uniswap.org) ⚡️ Pancakeswap V2, V3, Stableswap (pancakeswap.finance) ⚡️ Camelot (DEX, DEX Aggregator, Staking, Earning) (camelot.exchange) ⚡️ Lybra (LSDfi, Auto-Bearing-StableCoin, Staking, Vesting) (lybra.finance) ⚡️ 88mph (88mph.app) ⚡️ Olympus DAO (olympusdao.finance) ⚡️ NFT Minting/Staking/Borrowing/Marketplace I am passionate about blockchain technology and its potential to revolutionize various industries. I am committed to delivering high-quality blockchain solutions that meet the unique needs of my clients. Let's discuss how I can help you with your blockchain development needs.

𝗛𝗶 𝗨𝗽𝘄𝗼𝗿𝗸 👨‍💻 ✋ Greetings! I help Web3 projects and startups build secure, scalable blockchain solutions, now powered with AI automation, intelligent agents, and n8n workflows. With 9+ years in market and 3+ years of aggressive full-time Blockchain & Web3 delivery on Upwork (Top Rated), I’ve successfully delivered 40+ projects involving Solana, EVM chains, Substrate/Polkadot, smart contracts, dApps, DeFi, and token launches. In the past year, I’ve deeply expanded into AI automation: • n8n workflows for on-chain monitoring, automated trading, NFT minting & data pipelines • LLM-powered AI chatbots & agents (Telegram, Discord, Web3 dApps) • AI-integrated Web3 solutions that reduce manual work and create smarter products Core Expertise: - Blockchain: Solidity, Rust (Anchor), Substrate, Solana, EVM, Smart Contracts, DeFi, NFTs, dApps - AI Automation: n8n, OpenAI, Claude, Gemini, AI Agents, LLM Integration - Full-Stack: Next.js, React, Node.js, Python + Blockchain backend I don’t just develop, I deliver complete intelligent systems that launch faster, operate cheaper, and stand out in the 2026 market. Let’s discuss your project and build the next generation of AI-powered Web3 products. So, what we are waiting for, let's proceed further and build long term relationships. My skills are at your service! Regards, Hamza Yasin Founder of Quantum Bases | Listed on Toptal Marketplace as a "Vetted Engineer" | Top Rated on Upwork | Registered Tech Partner of Base44

Want to work with an experienced Blockchain developer who can bring your smart contract, decentralized application (dApp) vision to life? Are you looking for a Solidity or Rust developer to develop "Gas-Optimized" smart contracts? Whether you're looking to create ERC20 or SPL tokens, ERC721, ERC1155, or NFTs with custom features, concerned about vulnerabilities and exploits in your high-value contracts, need to write tests for contracts, or need a script to interact with leading DEX protocols—I've got you covered. 🖐 Some of my previous clients' quotes about me: ✔️ "...Excellent technical skills and consistently good communication... Completed the project in a timely fashion, exceeding our original deadline." ✔️ "His work was phenomenal...made sure I understood every step along the way... ✔️ "..took this project on as if it was his own... Great professional skills, always there to answer questions and suggest the best solutions." ✔️ "...Every facet of his work was impressive. WOW!" ✔️ "... goes above and beyond. Md's professionalism and expertise in blockchain are unmatched.." ✔️ "... communication is excellent, delivery is fast, and his knowledge of smart contracts is impressive." With expertise in EVM-compatible chains (like Ethereum, BSC) and Solana, I specialize in delivering high-performance, gas-optimized smart contracts and dApps tailored to your specific requirements. I help my clients build secure and highly resilient smart contracts, minimizing vulnerabilities and ensuring your code is fortified against exploits. I might be the perfect fit if you're thinking of any of these: ✅ "I need the BEST developer who's as passionate about my success as his own." ✅ "I want someone who will walk me through every step of smart contract interaction." ✅ "Gas fees are too high! My smart contract needs to be lightning-fast and cost-efficient." ✅ "I know blockchain, but I need a professional to make my smart contracts 100% secure." ✅ "I’m not an Ethereum or Solana expert, and I don’t have time to mess around with dApps." ✅ "Our last dApp was a disaster—I can’t afford to let that happen again." ✅ "I need an EVM-compatible blockchain or Solana expert to cover all my bases for cross-chain or multi-chain applications." Working with me, you will: 💎 Gain access to a developer skilled in Python, JavaScript, TypeScript, Rust, Solidity, Brownie, Hardhat, NextJS, Foundry, and Anchor. 💎Eliminate vulnerabilities and reduce gas fees during both deployment and interactions. 💎 Maximize your DApp's security with continuous follow-ups for improvements. 💎 Save time and resources—you won’t need to hire separate back-end, front-end, Rust, or Solidity developers because I handle it all as a full-stack developer. 💎 Receive custom scripts to swap, add, or remove liquidity, lend, deposit, borrow, withdraw, and interact across top dApp protocols. 💎 Optimize for multi-chain functionality—Whether you need to bridge Ethereum, BSC, or Solana, I can create solutions that integrate seamlessly across multiple networks. 🖐 My Skills & Expertise in Blockchain: ☑️Solidity Development for EVM-compatible smart contracts ☑️Rust Development for Solana Blockchain ☑️Experience with Chainlink, various ERC standards, and OpenZeppelin ☑️Token development(ERC20/BEP20/SPL) with features like Mintable, Burnable, Reflections, TxFee, Whitelist/Blacklist, and IDO/ICO for tokens. ☑️NFTs (ERC721, ERC1155, ERC404, etc) with Whitelist, Royalties, Presale, Public Sale, Dutch Auctions, IPFS Hosting, and Dynamic NFTs ☑️Full-stack Blockchain Developer with expertise in Solidity, Python (Brownie), JavaScript (Hardhat), Typescript, Rust(Anchor), NextJS, and Foundry. ☑️Script/Program Development for deploying/interacting with smart contracts and protocols like Aave, Uniswap, Raydium, and PancakeSwap. Why Work With Me: 💎Extensive Experience: I've designed and built hundreds of smart contracts from scratch, creating robust back-end scripts for deployment. 💎Expert Problem Solver: Proficient in designing projects from the ground up, solving complex problems, and rapid iterative prototyping. 💎Gas Optimization Strategies: I use professional strategies to optimize smart contracts for minimal gas fees and thoroughly test them to identify and prevent potential exploits. My Background in Numbers: ✔️ Over 3 years of experience with Blockchain technology. ✔️ Developed numerous DApps and scripts for protocols and tokens, including ERC20, BEP20, SPL, ERC721, and ERC1155. ✔️ Worked on several growing DApp projects, such as Crowdfunding platforms, Airdrop systems, DEXs, insurance, ICO, IDO, Tokens, Lottery, and NFT marketplaces. ✔️ Created a variety of smart contracts. ✔️ Wrote extensive test scripts for smart contracts using Foundry, Hardhat, and Anchor. Sound Like a Fit? Next Steps: Click the green "Invite to Job" button in the top right-hand corner or send me a message, and let’s schedule a call to discuss your project! Otherwise, feel free to book a consultation!

With 10+ years of experience as a Full-Stack Blockchain Developer, I specialize in building secure, high-performance Blockchain, AI and Web & Mobile app solutions. I prioritize clear communication, timely delivery, and a deep understanding of each client’s goals. My Core Strengths: ✓ Blockchain Development: Smart contracts, NFTs, DeFi platforms, DEXs, token launchpads (IDO/ICO), crypto trading bots, and Tele mini apps ✓ Web Development: Expertise in Node.js, React, Nest.js, MongoDB, MySQL, PHP, and HTML/CSS ✓ AI & Automation: AI-driven tools, Tele bots, trading automation, and task optimization I’m excited about the opportunity to collaborate with you and bring your ideal products to life. Feel free to reach out anytime. Thank you for your time and consideration. Best Regards, Loi Phan

🔧 I Build Scalable Web Apps, Intelligent Systems & Secure Blockchain Solutions — End to End. With 8+ years of experience, I help startups and enterprises turn ideas into production-ready tech. Clients hire me because I: ✅ Deliver fast without cutting corners (check my 5/5 Upwork streak) ✅ Explain tech in plain English—no jargon, just solutions ✅ Fix hidden problems (like that smart contract bug 3 other devs missed) 🛠 What I Bring to Your Project 1. Full-Stack Web Development Frontend: React, Next.js, Flutter (PWA/mobile-friendly) Backend: Node.js, Django, Microservices, REST/GraphQL APIs DB/DevOps: MongoDB, PostgreSQL, AWS, Docker, CI/CD 2. Blockchain (Bonus) Smart Contracts: Ethereum/Solana (Solidity, Rust) Web3 Apps: DeFi, NFTs, DAOs + MERN stack integration Private Chains: Hyperledger Fabric, IPFS 3. AI/ML (When You Actually Need It) Computer Vision: OpenCV, YOLO, ResNet (e.g. inventory tracking) LLMs: ChatGPT plugins, RAG pipelines, custom GPT wrappers MLOps: SageMaker, Azure ML for scalable model deployment 💬 Why Clients Keep Coming Back ✅ 100% on-time delivery on all Upwork projects (all 5-star rated) ✅ “Clean code first” mindset—your team can actually maintain my work ✅ AI/Blockchain pragmatism: I’ll tell you when it’s overkill 🚀 Recent Projects ✅ Blockchain Supply Chain Tracker: Hyperledger + React ✅ AI Document Reviewer: Node.js API + LLM for legal docs ✅ SaaS Platform at Scale: 50K users using AWS Lambda

If your system needs to process thousands of orders per second without dropping a message or corrupting state, that's the problem I solve in Rust. I've built order matching engines with price-time priority, market data pipelines that hold up under load, and backtesting engines with clean separation between strategy logic and execution. My work sits at the intersection of async Rust, low-latency design, and financial systems where being almost correct isn't good enough. I work with Tokio for async runtimes, think carefully about lock-free data structures, and treat determinism as a requirement not a nice-to-have. I don't copy-paste from Stack Overflow. I read RFCs, understand the borrow checker deeply, and write code that won't surprise you at 3am. If you're building an exchange, a trading bot, or financial infrastructure that needs to be fast and correct, let's talk.