🧙‍♂️ Have a look at my portfolio: tanzhixuan. com I’m Jimmy 👋 I’ve been coding since I was 15, with 9 years of real-world development experience. I’m a 🏆 42× World Hackathon Champion, with projects backed by AWS, Coinbase, Ethereum, and Polkadot, and $250K+ in grants and ecosystem funding. My focus areas include complex SaaS platforms, AI-augmented and multi-agent systems with advanced RAG pipelines, and Web3 products spanning infra, payments, DeFi, advanced NFTs, RWA tokenization, SocialFi, RealFi, and Web3 tooling integrated into existing Web2 stacks. I thrive in fast-moving remote teams, where I rapidly decompose complex problems, design practical architectures, and ship production-grade prototypes that take ideas to production with minimal friction. ⭐ Core Competencies: ✓ Programming Languages: JavaScript, TypeScript, Python, Solidity, Cadence, Move, Java, C, and MATLAB ✓ Web3 & Blockchain Platforms: Circle CCTP, Account Abstraction (AA) stack, Polkadot JS, QuickNode (Functions & Streams), Alchemy, Wagmi, Viem, Ethers, RainbowKit, ENS, Sign Protocol, World ID and Mini Kit, Chainlink (Functions & VRF), Pinata, and Storacha ✓ Frameworks & Libraries: React, Next.js, Tailwind CSS, Wagmi, Viem, Ethers, RainbowKit, and WordPress ✓ AI & Multi-Agent Systems: OpenAI, ChatGPT, Claude, DeepSeek, LangChain, ChromaDB, CrewAI, Cursor, GitHub Copilot, Stability AI, ElevenLabs, Fish STT, and RunwayML ✓ Cloud, Backend & Infrastructure: Firebase Realtime Database, Firebase Firestore, AWS EC2, AWS S3, Vercel, Redis, Git, and VS Code ✓ Design & Visualization: Figma, Adobe Photoshop, Adobe Premiere Pro, and PowerPoint with professional visual storytelling and advanced transitions ✓ Enterprise & Specialized Systems: Pinata × LangChain JS tool classes for IPFS upload, query, deletion, and group management; IPFS WordPress Plugin; Storacha integrations; Blend 3D Face Reconstruction Engine; HyperAgile tokenized warehouse robotic automation system; and Discuss AI, an agent-led discussion platform

Most blockchain products don't fail because of a bad idea. They fail because of a missed security check, an inefficient contract, poor protocol design, or infrastructure that can't handle real users. Whether it's a DeFi protocol, DEX, staking platform, NFT ecosystem, or token launch, one small mistake can put funds, users, and your reputation at risk. Building secure, scalable blockchain products that perform under real-world conditions is what I focus on. I'm a blockchain developer with 6+ years of experience designing and building production-ready applications across Solana and EVM ecosystems. I work with startups, Web3 teams, and established companies to turn complex blockchain ideas into reliable products from smart contracts and protocol development to full-stack decentralized applications and backend infrastructure. Over the years, I've contributed to products that have supported millions of users, routed billions in transaction value, maintained high availability, and powered secure on-chain operations across multiple blockchain networks. Some of the blockchain products I've worked on : ** High-Performance Solana DeFi Infrastructure** – Built core infrastructure for a Solana ecosystem including a DEX aggregator, validator services, high-performance RPC, and developer SDKs. Worked extensively on transaction optimization, gasless user experiences, MEV-aware routing, and real-time blockchain data streaming to deliver fast and reliable DeFi infrastructure. **Blockchain Credential Platform** – Developed a platform that issues and verifies permanent digital certificates using compressed NFTs on Solana. The solution enables organizations to create tamper-proof credentials that remain publicly verifiable while significantly reducing on-chain storage costs. **Web3 Social & NFT Marketplace** – Helped build a decentralized social platform where users can mint content as NFTs, trade digital assets, earn royalties, and manage identities through wallet authentication. The platform included marketplace functionality, referral systems, KYC integration, and scalable backend services. My technical stack includes Rust, Anchor Framework, Solana Program Library (SPL), Token-2022, Metaplex, Solana Web3.js, Solidity, Ethereum, EVM-compatible chains, DeFi protocol development, DEX architecture, NFT infrastructure, smart contract development, Node.js, TypeScript, React, PostgreSQL, Docker, Kubernetes, AWS, GCP, REST APIs, GraphQL, WebSockets, CI/CD, and comprehensive testing across localnet, devnet, and mainnet environments. I believe successful blockchain development is about more than writing smart contracts. Every feature is designed with security, performance, maintainability, and long-term scalability in mind. I communicate progress clearly, document important decisions, and deliver thoroughly tested code that teams can confidently deploy to production. If you're building a DeFi protocol, decentralized exchange, staking platform, token ecosystem, NFT marketplace, Web3 application, or any blockchain product where security and reliability matter, I'd be happy to discuss your project. Even if you're still refining the idea, send me a message I'll provide an honest assessment, recommend the best technical approach, and let you know how I can help bring it to production.

Over the past 21+ years I have worked across early web systems, enterprise software, blockchain platforms, and AI. These days I spend most of my time helping founders and product teams figure out what they actually need to build, and then building it with them. I enjoy making complex technology feel straightforward. That is something clients come back for. I have spent 10+ years deep in blockchain and the last few fully focused on AI. I can connect those two worlds in ways most developers cannot. Clients tell me they appreciate that I do not just execute tasks. I ask questions, flag things that have not been considered yet, and keep the bigger picture in view throughout the project. ARTIFICIAL INTELLIGENCE AND GENERATIVE AI • AI Agents and Multi-Agent Systems using LangGraph, CrewAI, and AutoGen for task automation, research, and business process orchestration • RAG pipelines and enterprise knowledge platforms using Pinecone, Weaviate, Qdrant, and ChromaDB • LLM integration across OpenAI, Claude, Gemini, and open-source models into real business workflows • MCP, prompt engineering, context management, and agentic workflow architecture • AI-powered trading platforms with ML signal generation, backtesting, risk management, and live execution • NLP, sentiment analysis, OCR, document intelligence, and intelligent workflow automation • Computer Vision for object detection, video analytics, behavioral analysis, and real-time event detection • Model deployment, inference optimization, evaluation frameworks, and production AI infrastructure • Backend systems for AI using FastAPI, Flask, Django, GoLang, and Rust BLOCKCHAIN AND WEB3 • 10+ years across Ethereum, Solana, Polygon, BSC, Tron, Flow, Hyperledger Fabric, Stellar, TON, Bittensor, and Aptos • End-to-end Web3 platforms including DeFi protocols, NFT marketplaces, custodial and non-custodial wallets, DEXs, and dApps • Smart contracts in Solidity, Rust, and Cadence covering ERC-20, ERC-721, ERC-1155, security reviews, and audits • Token launches including ICO, IDO, and IEO ecosystems, tokenomics design, and exchange integrations • Whitepapers, governance models, and go-to-market strategy for public, private, and consortium networks • Layer 2 scaling, cross-chain bridges, and gas optimization • Full project lifecycle from architecture and security design through to production delivery PROJECT HIGHLIGHTS • Built a multi-agent RAG system for an enterprise client processing 1M+ internal documents, reducing research time by 70 percent • Delivered an LLM-powered support agent using OpenAI and LangGraph handling 10,000+ queries per month with over 90 percent deflection rate • Architected an AI algorithmic trading platform with ML signal generation and live multi-exchange execution • Built an automated crypto trading bot running across Binance, Bybit, and OKX with real-time risk management • Designed and deployed a DeFi lending protocol on Ethereum with 5M+ TVL including liquidation engine and governance • Delivered a supply chain traceability platform on Hyperledger Fabric tracking 500,000+ assets annually • Led end-to-end delivery of multiple NFT marketplace platforms with minting, auction, royalty, and secondary market features • Built a real-time Computer Vision productivity monitoring system deployed across 500+ workstations • Delivered an OCR and NLP document processing pipeline that reduced manual data entry by 85 percent for an insurance client INDUSTRIES SERVED FinTech and Trading | DeFi and Crypto | Enterprise SaaS | Healthcare and MedTech | Supply Chain | Real Estate | E-Commerce | Legal and Compliance | Media Platforms HOW I WORK • I ask a lot of questions upfront, not to slow things down, but because the right questions save weeks later • I am easy to talk to, even on technical topics. Non-technical founders tell me I make things click for them • You will always know where the project stands. I do not go quiet and reappear with a finished build • I have worked with clients across the US, Europe, the Middle East, and Asia. Async communication is second nature to me CORE TECH STACK AI and ML: Python, LangChain, LangGraph, CrewAI, AutoGen, OpenAI, Claude, Gemini, HuggingFace, Pinecone, Weaviate, Qdrant, ChromaDB, FastAPI, Flask, Django Blockchain: Solidity, Rust, Cadence, Web3.js, Ethers.js, Hardhat, Foundry, Anchor, Truffle Backend and Infrastructure: GoLang, Node.js, .NET, Docker, Kubernetes, AWS, GCP, Azure Frontend: React, Next.js, TypeScript If you are not sure exactly what you need yet, that is fine. That is usually where the best conversations start. Send me a message and we will figure it out together.

🔹 What I build I build production backend systems that handle real-time distributed traffic at scale using Golang, Python and Node.js. I focus on systems where latency, reliability, and throughput directly impact production outcomes under high concurrency and event-driven workloads. I design and implement blockchain integration layers that connect backend systems with Ethereum-based transaction and wallet workflows in production environments. 🔹 Production impact Focused on building production-grade systems that improve reliability, throughput, and system resilience under real-world traffic conditions. Built real-time backend systems using Go, Node.js, and Python with Redis Pub/Sub and SSE for high-volume event-driven communication Designed and stabilized high-throughput API systems and microservice architectures under concurrent production traffic Developed blockchain transaction and wallet integration systems using Node.js and Ethereum-based stacks in production environments Implemented smart contract interaction layers and backend services for token and transaction workflows Built payment and external API integration systems with strong consistency, idempotency, and failure recovery requirements Operated cloud backend systems on AWS/GCP with scaling, monitoring, and production observability 🔹 Core engineering focus Distributed backend systems (Go / Node.js / Python) Event-driven architecture (Redis Pub/Sub, SSE) Blockchain transaction systems (Ethereum / Web3 integration) Backend ↔ on-chain data flow design High-concurrency API systems Production reliability, scalability, and latency optimization 🔹 How I work I identify bottlenecks in production systems across latency, throughput, and data consistency. I implement changes that improve system stability and performance across backend and blockchain layers without disrupting production traffic. 🔹 Availability Available for backend architecture, blockchain integration, system scaling, and production refactoring projects.

Launching a blockchain product is more than deploying a smart contract. Whether you're creating a token, building a wallet, launching an NFT collection, or developing a Web3 platform, every component needs to be secure, scalable, and designed for long-term growth. Poor contract architecture, weak wallet integration, or overlooked security risks can lead to costly issues after launch. Building blockchain products that users can trust is what I do. I'm a senior blockchain and crypto developer with 9+ years of experience delivering production-ready solutions across Solana, Ethereum, BNB Chain, Polygon, Base, and other EVM ecosystems. I help startups, founders, and businesses transform blockchain ideas into secure, user-friendly products from smart contracts and token launches to NFT platforms, wallets, and complete decentralized applications. Over the years, I've contributed to blockchain platforms serving millions of users, processing high-value on-chain transactions, and supporting scalable Web3 ecosystems with security and reliability at their core. Some of the blockchain products I've worked on : Token Launch & Ecosystem Development – Built fungible tokens with advanced tokenomics, vesting mechanisms, staking, governance, liquidity integration, and treasury management, ensuring secure and efficient token launches across multiple blockchain networks. NFT Marketplace & Digital Assets Platform – Developed NFT minting platforms, marketplaces, royalty systems, metadata management, and compressed NFT solutions, enabling creators and businesses to launch scalable digital asset ecosystems. Multi-Chain Wallet & Web3 Applications – Engineered secure wallet integrations supporting transaction signing, token transfers, NFT management, staking, and seamless interaction with decentralized applications while delivering intuitive user experiences. My technical stack includes Rust, Solidity, Anchor Framework, Solana Program Library (SPL), Token-2022, Metaplex, Ethereum, Solana, Polygon, Base, BNB Chain, Ethers.js, Solana Web3.js, Web3.py, Node.js, TypeScript, React, Next.js, PostgreSQL, MongoDB, Docker, Kubernetes, AWS, GCP, REST APIs, GraphQL, CI/CD, and comprehensive testing across development and production environments. I believe great blockchain products combine strong engineering with clear communication. Every feature is built with security, maintainability, and performance in mind, backed by thorough testing and clean documentation. I keep clients informed throughout development, explain technical decisions in straightforward language, and deliver solutions that are ready for production not just demos. If you're planning a token launch, NFT platform, crypto wallet, Web3 application, DAO, staking platform, or any blockchain-based product, I'd be happy to discuss your vision. Share your idea or existing project, and I'll provide an honest assessment, recommend the right technical approach, and help you build a secure, scalable solution that lasts.

I build production AI systems: LLM agents, RAG pipelines, inference infrastructure, and AI-powered products. My recent work includes ML infrastructure for an a16z-backed AI research lab (model deployment, evaluation pipelines across 199+ benchmarks), a fiduciary-grade zero-knowledge AI platform now serving paying customers, and agentic systems running in production today. 12+ years building production software. 50+ products shipped across 12 industries. $900K+ earned on Upwork with 100% Job Success, and an average client engagement over 3 years, clients stay because I deliver. What you get with me: technical leadership and hands-on execution from the same person. I design your architecture, build your AI integrations, ship production code, and leave you with something your team can own. No handoffs, no gap between the strategist and the person writing the code. On the AI side, I go well beyond API wrappers: production RAG systems, multi-agent workflows, intelligent model routing for cost and performance, and inference infrastructure for AI research teams. I bring the same depth to high-concurrency backends, complex payment platforms, and modern web applications that need to scale. I work primarily in TypeScript, Python, and Go across React, Next.js, Node.js, and AWS. I've shipped enough systems to know what compounds and what becomes technical debt, which means faster time to production with fewer costly architectural mistakes. I work with everyone from early-stage startups to engineering teams inside larger companies. If you're building something with AI, or something ambitious that needs to actually ship, let's talk. U.S.-based | Available now for projects, sprints, and fractional engagements.

I hold Upwork’s Expert-Vetted badge, placing me among the top 1% of blockchain engineers on the platform, recognized for deep technical expertise, reliability, and consistent delivery. I am a senior Blockchain Engineer with 6+ years of hands-on experience designing and delivering production-grade smart contracts, DeFi protocols, token launch infrastructure, and staking systems across Ethereum, BSC, Solana, TRON, and EVM-compatible chains. I specialize in: - Token launch & fundraising contracts (presale logic, vesting, allocations) - Staking & rewards systems (APR logic, emissions, compounding) - DeFi protocols (lending, liquidity, yield mechanisms) - Secure, gas-optimized Solidity smart contracts - Smart contract integrations with existing platforms and backends I’ve contributed to 300+ blockchain projects, including live exchanges and large-scale on-chain systems, giving me a full lifecycle understanding — from protocol design and architecture to deployment, testing, and post-launch support. Security, scalability, and long-term maintainability are always first-class concerns in my work. While I have experience with NFTs, my current focus is on real utility blockchain systems — DeFi, staking, token economics, and secure on-chain infrastructure that supports sustainable products. ⭐ 99%+ of my client reviews are 5-star, reflecting clear communication, on-time delivery, and dependable execution. If you’re looking for a senior blockchain engineer who can take ownership of complex smart contract systems and deliver with confidence, I’d be happy to discuss your project and help you move forward efficiently.

Full-Stack Developer & Systems Architect With over 10 years of experience, I design and build secure, high-performance digital systems that support scalability, automation, and long-term business growth. I specialize in architecting intelligent, cloud-ready solutions using modern frameworks, robust backend systems, and AI-driven technologies. Core Competencies: Frontend & Mobile: React, Vue, Angular, Next.js, React Native, Progressive Web Apps (PWAs) Backend & APIs: Node.js, Laravel, Django, Golang, REST & GraphQL APIs, Payment Integrations AI & Automation: GPT-based chatbots, NLP solutions, intelligent workflow automation Mobile App development: React-Native (iOS & Android) Blockchain & Web3: Smart Contracts, Web3 & dApp Development, Ethereum, Polygon, Solana, Token & NFT Development, DeFi Platforms, Wallet Integrations, Smart Contract Security, IPFS, and Enterprise Blockchain Solutions. Cloud & DevOps: AWS, Docker, Kubernetes, CI/CD pipelines, infrastructure security and optimization Databases & Analytics: MySQL, PostgreSQL, MongoDB, Redis, Elasticsearch, ClickHouse Mobile App, Game & AI Development: Cross-platform iOS and Android app development AI features like chatbots, recommendations, voice, image recognition, and automation Mobile game development with animations, rewards, leaderboards, and in-app purchases API integration, Firebase, payments, push notifications, and real-time features App testing, performance optimization, and store deployment AI/ML: Integrate intelligent AI/ML capabilities using OpenAI (GPT-4, ChatGPT), Claude AI, Gemini, TensorFlow Lite, Core ML, ML Kit. Expertise includes NLP, computer vision, voice assistants, recommendation engines, automation, and predictive analytics AI Agent Development: AI Chatbots, AI Bots, AI Classifiers, Voice AI, AI Text-to-Speech, AI Speech-to-Text, Bot Development, Deepbrain AI, CrewAI, AutoGen Blockchain & Web3: Smart Contracts (Solidity, Rust), Web3 & dApp Development, Ethereum, Polygon, Solana, BNB Chain, ERC-20 & ERC-721 Token Development, NFT Platforms, DeFi Solutions, Staking & DAO Platforms, Wallet Integrations (MetaMask, WalletConnect), Smart Contract Auditing & Security, Cross-Chain Solutions, IPFS Integration, Cryptocurrency Payment Integrations, Enterprise Blockchain Solutions (Hyperledger). AR/VR/MR/XR Expertise: AR Applications: ARKit, ARCore, Vuforia VR Applications: Oculus, HTC Vive Extended Reality (XR): Seamless AR, VR and MR integration Unity/Unreal: App/Game Development, Metaverse 3D Technologies: Three.js, WebGL, Blender UI/UX Design: Skilled in Figma, Adobe XD, and Sketch with expertise in wireframing, interactive prototyping, Lottie animations, Material Design, and Apple HIG-based user experiences Backend & APIs: Build scalable and high-performance backends using Node.js (Express, NestJS), Python (Django, FastAPI), Laravel, Firebase, and Supabase with strong experience in REST APIs, GraphQL, and WebSocket integrations Integrations: Experienced with payment systems (Stripe, PayPal, Apple Pay, Google Pay), maps & geolocation (Google Maps, Mapbox), push notifications (FCM, APNs), chat platforms (Twilio, SendBird), video calling (Agora, WebRTC), analytics (Firebase, Mixpanel), social logins, and biometric authentication I am committed to building scalable, future-proof systems aligned with your business objectives and would be glad to support your next initiative. Let’s connect and discuss your project.

Hi! I’m Nawaz, a results-driven 𝗕𝗹𝗼𝗰𝗸𝗰𝗵𝗮𝗶𝗻 & 𝗪𝗲𝗯𝟯 𝗙𝘂𝗹𝗹-𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 with 6+ years of experience building secure, scalable, and future-ready decentralized solutions. I help startups, enterprises, and innovators transform blockchain ideas into production-grade platforms, covering everything from architecture and tokenomics to smart contracts, DApps, security, and deployment. My expertise spans DeFi, NFTs, token launches, enterprise blockchain, trading automation, on-chain data systems, and high-performance Web3 applications. 🔹What I Bring to the Table: ✓ End-to-End Blockchain Development — Architecture, smart contracts, backend, frontend, deployment & audits ✓ Smart Contracts (ERC-20, ERC-721, ERC-1155, SPL, BEP, TRC) — Secure, gas-optimized, audit-ready ✓ NFT Platforms & Marketplaces — Minting, metadata, IPFS, royalties, fractionalization ✓ DeFi Protocols — Lending/borrowing, staking, farming, liquidity pools, automated market making ✓ Crypto Wallet & Exchange Integrations — MetaMask, WalletConnect, Binance, Coinbase, custom wallets ✓ Web3 Integrations — Ethers.js, Web3.js, Moralis, The Graph, Chainlink, oracle feeds ✓ Token Launches (ICO, IDO, IEO, INO, STO) — Tokenomics, vesting, launchpad setup ✓ Trading & Arbitrage Bots — On-chain data reading, liquidity scanning, MEV-safe execution ✓ Performance Optimization — Gas optimization, caching, off-chain computation ✓ Security & Audit Readiness — Reentrancy protection, access control, fail-safes, unit testing 🔹Tech Stack Expertise: - Languages: Solidity, Rust, JavaScript, TypeScript, Python, Go - Smart Contract Tools: Hardhat, Truffle, OpenZeppelin, Remix - Web3 Tools: Ethers.js, Web3.js, Moralis, IPFS, The Graph, Chainlink - Frontend: React, Vue.js, Angular - Backend: Node.js, Express.js, Django - Blockchains: Ethereum, Polygon, BSC, Solana, Tron, Stellar, Algorand, Hyperledger - DevOps / Infra: Docker, GitHub Actions, AWS, Railway, Vercel, CI/CD pipelines - Databases: MongoDB, PostgreSQL, Redis 🔹Why Clients Hire Me ✓ 6+ Years of Real-World Blockchain Experience with proven product launches ✓ Multi-Chain Expertise to choose the best protocol for performance & cost ✓ Full-Stack Web3 Development — I build entire ecosystems, not just contracts ✓ Security-Driven Development with industry-grade audit standards ✓ Business & Technical Understanding — I translate ideas into viable products ✓ High Reliability — On-time delivery with clear, documented processes If you’re looking to build or scale your blockchain product, let’s connect and turn your vision into a powerful decentralized solution. I’d be happy to discuss your requirements and help you build something extraordinary.

Backed by 100% Job Success over 60 projects, 𝐈 𝐨𝐟𝐟𝐞𝐫 𝐅𝐑𝐄𝐄 𝐭𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐜𝐨𝐧𝐬𝐮𝐥𝐭𝐚𝐭𝐢𝐨𝐧 𝐚𝐧𝐝 𝐚 𝐅𝐑𝐄𝐄 𝐪𝐮𝐢𝐜𝐤 𝐫𝐞𝐯𝐢𝐞𝐰 𝐨𝐟 𝐲𝐨𝐮𝐫 𝐩𝐫𝐨𝐣𝐞𝐜𝐭. AI Full stack Developer with 9+ years across Web3 & AI. I build production agents that automate real workflows including RAG, multi-agent systems, trading & onchain automation, blockchain onchain data, Fintech, DeFi, RWA, Payment gateway. 🤖 AI agent work (what I ship now): - Custom AI agents & copilots - LangGraph, LangChain, CrewAI, OpenAI & Claude APIs - RAG pipelines grounded in your data - vector DBs, evaluation suites, guardrails against hallucination - Multi-agent orchestration - planner/worker/reviewer patterns, tool use, memory - Workflow automation - n8n, Slack/Telegram/WhatsApp bots, CRM & API integrations - Trading & onchain agents - bots that read markets, execute strategies, and interact with smart contracts safely ⛓️ Web3 foundation (9+ years): - DeFi protocols - lending, staking, perp DEXs, cross-chain (LayerZero, Axelar) - Smart contracts - Solidity, Rust, Foundry, audit-ready code - Wallets & infra - ERC-4337 account abstraction, MPC wallets, rollups (OP Stack, zkSync) Selected projects: - Multi-agent AI platform serving live users - Decentralized perpetual exchange - AI trading agent with onchain execution and risk limits - Liquity fork with multi-collateral DeFi architecture - RAG support agent resolving 60% of tickets automatically How I work: fixed scope, clear milestones, daily updates, full code ownership on delivery. I'll always recommend the smallest build that gets you a working agent in production — not the biggest. 📩 Send me the workflow you want automated (or the protocol you want built) and I'll reply with a concrete approach within an hours or book a 30-min consultation directly from this profile.