As an Expert-Vetted (Top 1% Upwork Talent) strategist with 25+ years of industry leadership, I specialize in AI-driven development ecosystems. I lead ChicMic Studios, a premier studio where we bridge the gap between visionary concepts and high-stakes enterprise reality. We don't just build applications; we architect intelligent, scalable ecosystems that define industry standards. In today's landscape, development must be AI-First. I provide the strategic leadership to integrate agentic workflows, machine-to-machine economies, and decentralized Web3 architecture into your core business model. Notable Highlights: Scale & Trust: Successfully overseen 2000+ projects with a team of 150+ experts. Enterprise Pedigree: Trusted partner for Fortune 500s including Microsoft, Samsung, P&G, and high-growth leaders like Swiggy. AI-Native Infrastructure: Expert in integrating LLMs, agentic process automation, and RAG systems into enterprise workflows. Gaming & Metaverse Powerhouse: Award-winning expertise in Unreal Engine 5, Unity, and Roblox, creating immersive worlds for millions of players. Operational Excellence: Agile-led delivery with a focus on rigorous coding standards and SOC2-level security. Our Pillars of Innovation: Enterprise AI: Agentic workflows, custom LLM integration, and autonomous business process automation. Gaming & Social Platforms: High-fidelity multiplayer builds (UE5/Unity) and branded Roblox experiences for the next generation of digital consumers. Web3 & Blockchain: Smart contract architecture, x402 protocol integration, and decentralized identity. Mobile & Web: Scalable, high-concurrency platforms designed for maximum ROI and global reach. What Clients Say: "Great team! We could rely on them to do all the work as planned, and we got what we needed right in time." "Thorough in their approach and inspired trust. I would definitely work with ChicMic Studios again." "Always delivers prompt and professional service—that's why they get first dibs on all our new projects." The Commitment: We are committed to delivering future-proof, AI-enhanced solutions tailored to your unique enterprise needs. Whether you are a brand looking to enter the Roblox metaverse or a corporation seeking to automate via Agentic AI, let’s turn your vision into reality. Ready to lead your industry? Let's discuss your project.

As a well-qualified Tech Stack Developer, I possess a profound understanding of client requirements and am dedicated to delivering high-quality work. With expertise in various programming utilities and languages, I am committed to empowering individuals and organizations with the skills necessary to excel in the digital age. I bring over 10 years of experience in software development, spanning multiple technology stacks and cloud platforms. Let's collaborate and bring your projects to life! I have advanced expertise in the following fields: ✔️ Programming Languages: Javascript, Java, Python, Golang, PHP ✔️ Frontend: React JS, Vue.js, jQuery ✔️ Backend: Node.js ( Nest JS, Express JS), Django, Laravel, ASP.NET ✔️ DevOps & System: AWS, Azure, GCP ✔️ Database: MongoDB, MySQL, PostgreSQL, Redis, Firebase, and more... I offer specialized expertise in the following services: ✔️ AI, Social Marketing ✔️ Blockchain Development ✔️ Web Development, WordPress I am looking forward to working with you and developing your dream products. So don't hesitate to get in touch with me. Thank you for considering me for your project!

• I build smart contracts that go live on mainnet and handle real user funds. • Featured on Upwork's homepage among Top Rated Blockchain & NFT developers. • From designing smart contracts to complete Web3 dApps, I turn blockchain ideas into reality. Hi, I'm a Blockchain Developer and Web3 Engineer with a strong focus on security and scalability. My work includes building smart contracts on both Solana and EVM blockchains using Rust, Anchor, Solidity, Hardhat and TypeScript. I have worked extensively in the blockchain space, developing DeFi apps, NFT marketplaces, token launch platforms, automated tools, custom wallets, pricing modules and advanced Web3 projects that deliver real-world impact. My experience includes: • Solana Smart Contracts (Rust, Anchor). • Ethereum Smart Contracts (Solidity, Hardhat). • DEX, AMM, and DeFi Protocols. • Trading Bots and Automated Trading Infrastructure. • SPL Tokens, ERC-20 Tokens, NFTs, and Token Launches. • Blockchain APIs and Backend Systems. • Staking, Swapping, and Payment Solutions. If you're building on Solana, Ethereum, Base, BNB or Polygon, I can take your project from idea to deployment. My recent work includes: • Building a cross-chain interoperability protocol. • Created an SPL and ERC-20 token contract on both chains with advanced features. • Optimized a Solana trading bot's latency through performance tuning. • Reduced gas costs by 20% through smart contract optimization. If you're looking for a Blockchain Developer who values quality, security and clear communication, let's discuss your project and see how I can help. ································································································································································ Blockchain Developer, Smart Contract Developer, Solidity Developer, Rust Developer, Solana Developer, Ethereum Developer, EVM Developer, Web3 Developer, Full Stack Web3 Developer, DeFi Developer, dApp Developer, Trading Bot Developer, NFT Developer.

Are you looking to build a scalable AI-powered platform with secure Web3 integration? I am a 𝐒𝐞𝐧𝐢𝐨𝐫 𝐅𝐮𝐥𝐥 𝐒𝐭𝐚𝐜𝐤 𝐀𝐈 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫 specializing in the 𝐌𝐄𝐑𝐍 𝐬𝐭𝐚𝐜𝐤, 𝐍𝐞𝐱𝐭.𝐣𝐬, and 𝐢𝐧𝐭𝐞𝐥𝐥𝐢𝐠𝐞𝐧𝐭 𝐚𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧 to help startups launch production-ready applications. In 2026, a standard web app isn't enough. You need 𝐀𝐈 𝐀𝐠𝐞𝐧𝐭𝐬 that automate workflows and 𝐖𝐞𝐛𝟑 𝐩𝐫𝐨𝐭𝐨𝐜𝐨𝐥𝐬 that ensure transparency and security. With 𝟕+ 𝐲𝐞𝐚𝐫𝐬 𝐨𝐟 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞 on Upwork with a 𝟏𝟎𝟎% 𝐉𝐨𝐛 𝐒𝐮𝐜𝐜𝐞𝐬𝐬 𝐒𝐜𝐨𝐫𝐞, I bridge the gap between complex backend logic and seamless user experiences. My Core Technical Expertise: 1) 𝐅𝐮𝐥𝐥 𝐒𝐭𝐚𝐜𝐤 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: Expert-level Next.js, React.js, Node.js, and TypeScript. 2) 𝐀𝐈 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧: Building custom AI Agents, LLM implementation (OpenAI, Gemini, LangChain), and Vector Databases (Pinecone/Milvus) for RAG-based applications. 3) 𝐖𝐞𝐛𝟑 & 𝐁𝐥𝐨𝐜𝐤𝐜𝐡𝐚𝐢𝐧: High-performance Solana (Rust/Anchor) and Ethereum (Solidity) smart contracts, DeFi protocols, and DApp architecture. 4) 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞 & 𝐃𝐞𝐯𝐎𝐩𝐬: PostgreSQL, MongoDB, AWS, and Vercel for high-availability deployments. Why Clients Choose Me: 1) 𝐍𝐢𝐜𝐡𝐞 𝐒𝐩𝐞𝐜𝐢𝐚𝐥𝐢𝐬𝐭: I don’t just "write code." I specialize in Fintech, SaaS, and RWA (Real World Asset) Tokenization. 2) 𝐏𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞 𝐅𝐢𝐫𝐬𝐭: My applications are optimized for speed, gas efficiency (Web3), and low-latency AI responses. 3) 𝐏𝐫𝐨𝐯𝐞𝐧 𝐑𝐞𝐥𝐢𝐚𝐛𝐢𝐥𝐢𝐭𝐲: I bring a level of discipline, clear communication, and architectural integrity that ensures your project is delivered on time and within budget. Stop hiring multiple developers for AI, Web3, and Frontend. Let’s build your entire ecosystem under one roof. 𝐂𝐥𝐢𝐜𝐤 𝐭𝐡𝐞 "𝐌𝐞𝐬𝐬𝐚𝐠𝐞" 𝐨𝐫 "𝐈𝐧𝐯𝐢𝐭𝐞" 𝐛𝐮𝐭𝐭𝐨𝐧 𝐭𝐨 𝐝𝐢𝐬𝐜𝐮𝐬𝐬 𝐲𝐨𝐮𝐫 𝐩𝐫𝐨𝐣𝐞𝐜𝐭 𝐫𝐞𝐪𝐮𝐢𝐫𝐞𝐦𝐞𝐧𝐭𝐬 𝐭𝐨𝐝𝐚𝐲.

I build AI-powered SaaS products end-to-end — solo. From database schema to LLM pipeline to deployed product. 6+ years, 50+ projects, clients across Switzerland, USA, Israel, Italy, and India. AI Agents & LLM Workflows — production agents using Claude API, OpenAI, and LangChain. Tool calling, RAG over vector databases (pgvector, Pinecone), structured output validation with Pydantic, retry logic, and eval harnesses so prompt changes never silently break production. Full-Stack SaaS — Next.js, React, TypeScript on the frontend. FastAPI, Python, Node.js on the backend. PostgreSQL and Supabase with Row-Level Security for true multi-tenant isolation — tested, not assumed. Stripe for billing, AWS where needed. Recent work: an autonomous WhatsApp agent that qualifies leads and books appointments with zero human in the loop; an AI image-generation SaaS turning one product photo into catalog-ready shots in 60 seconds; a multi-tenant ERP with role-based access. I write plain-English decision notes instead of jargon, give live demos at milestones, and tell you directly when something's outside my experience — and how fast I can ramp up on it. Stack: Python, TypeScript/Node.js, Next.js, React, FastAPI, PostgreSQL, Supabase, Claude API, OpenAI API, LangChain, RAG, pgvector, AWS, Stripe, Docker. Let's talk about what you're building

★ Top Rated Full-Stack Engineer | 100% JSS — delivering high-performance, production-ready systems. ★ Fast, structured delivery from idea to production with clear communication. ★ Full-stack engineering for scalable applications with AI-powered features, frontend, backend, and integrations. What clients say about my work: 🌟 Andrew is a very talented developer, he worked with me to implement any ideas I had and it is always a pleasure whenever we work with him. 🌟 Very professional service and development on my project. 🌟 Andrew is a skilled developer, while working with our several complex systems he quickly understood the existing code, and provided elegant solutions and thorough testing. 🌟 Andrew pays very good attention to detail and helped show me things I did not consider. I appreciate Andrew's ability to keep an active line of communication open and stay on track when requesting multiple milestones and updates. 🌟 Couldn't have asked for the project to have been done any better. Delivered exactly what I asked for communication was excellent even when I may have been annoying haha. My go-to developer for future projects 10/10. Engineering for Business Efficiency & Scale Companies with traction don't just need more code — they need to move faster and spend less on operations. I help growing businesses design and deploy reliable AI workflows and high-performance backends that directly impact efficiency. Technology Stack • AI Agents: OpenClaw, Copilot, Codex · Cursor • LLMs: GPT · Claude · Gemini · Qwen · Gemma • Languages: Rust · Python · Golang · JavaScript · TypeScript

🧙‍♂️ 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

𝐒𝐞𝐧𝐢𝐨𝐫 𝐁𝐥𝐨𝐜𝐤𝐜𝐡𝐚𝐢𝐧 𝐀𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭 | 𝐒𝐦𝐚𝐫𝐭 𝐂𝐨𝐧𝐭𝐫𝐚𝐜𝐭 𝐒𝐞𝐜𝐮𝐫𝐢𝐭𝐲 𝐑𝐞𝐬𝐞𝐚𝐫𝐜𝐡𝐞𝐫 | 𝐅𝐮𝐥𝐥-𝐒𝐭𝐚𝐜𝐤 𝐖𝐞𝐛𝟑 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫 Web3 Security Expert | High-Performance Backend Architect | Top-Rated Developer | 100% Commitment to Protocol Safety 👨‍💻 𝐀𝐛𝐨𝐮𝐭 𝐌𝐞 I am a Senior Blockchain Engineer and Web3 Security Researcher with 3+ years of experience specializing in architecting high-performance, fault-tolerant decentralized systems. I bridge the gap between secure on-chain logic and institutional-grade backend infrastructure. I don’t just write smart contracts—I engineer systems for peak performance and military-grade security. Whether it is auditing high-value DeFi protocols or architecting microservices for NatWest Group, my work translates to measurable improvements in system safety, gas efficiency, and throughput. ➡ 𝐖𝐡𝐲 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐇𝐢𝐫𝐞 𝐌𝐞 • Proven Security Track Record: Identified 20+ critical vulnerabilities in production-grade protocols. Ranked Weekly #347 on Code4rena and #856 on Sherlock global leaderboards. • Institutional-Grade Engineering: Currently architecting microservices from scratch at NatWest Group, owning the complete lifecycle from design to cloud deployment. • Gas & Performance Mastery: Engineered gas optimizations that reduced execution costs by up to 60%. Boosted backend system throughput by 200% using advanced concurrency models. • Academic & Research Authority: IEEE-published author on blockchain architecture, achieving a 100x faster resolution time compared to traditional systems. • Mainnet Success: Successfully launched Middle Earth AI on Solana Mainnet, securing over $100K in TVL with 500+ active players. ➡ 𝐌𝐲 𝐒𝐞𝐫𝐯𝐢𝐜𝐞𝐬 1️⃣ Smart Contract Auditing & Security Analysis Comprehensive audits for Solidity and Rust (Anchor) codebases. I identify reentrancy, complex logic errors, and economic exploits using Foundry, Hardhat, and custom fuzzing suites. 2️⃣ DeFi & Web3 Protocol Development End-to-end architecture for token issuance, staking vaults (ERC-4626), reward distribution, and Merkle-based airdrops. Expert in gas-optimized DeFi primitives and account abstraction (ERC-4337). 3️⃣ High-Performance Backend & API Engineering Building resilient microservices using Python (FastAPI) and Go to bridge off-chain workflows with on-chain data. Specializing in high-volume data ingestion and 3x API latency reduction. 4️⃣ Full-Stack DApp Integration Seamless integration of secure contracts with responsive React/Next.js frontends using Ethers.js and Web3.js for a cohesive user experience. ➡ 𝐓𝐞𝐜𝐡 𝐒𝐭𝐚𝐜𝐤 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 🧠 𝐀𝐈 & 𝐀𝐠𝐞𝐧𝐭𝐢𝐜 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: • LLMs & Interfaces: Gemini 1.5 Pro, ChatGPT (GPT-4o), Claude 3.5 Sonnet, OpenRouter. • Agentic Tools: AntiGravity, OpenClaw, LangChain, LlamaIndex, AutoGPT. • AI Dev Environment: Cursor, GitHub Copilot, Ghostwriter. • AI Infrastructure: Vector Databases (Pinecone, Weaviate, Milvus), OpenAI API, Anthropic API. ⚙️ 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 & 𝐒𝐲𝐬𝐭𝐞𝐦𝐬: • Languages: Solidity, Yul, Rust, Python, Go, Java, SQL, C++, TypeScript. • Frameworks: FastAPI, Django, Flask, Spring Boot, gRPC, Protobuf, Node.js. • Performance: Celery, Redis, RabbitMQ, Kafka, Multithreading/Concurrency. ⛓️ 𝐁𝐥𝐨𝐜𝐤𝐜𝐡𝐚𝐢𝐧 & 𝐒𝐞𝐜𝐮𝐫𝐢𝐭𝐲: • Security Tools: Foundry, Hardhat, Slither, Echidna, Mythril, Surya, SolidityScan, Manticore. • Frameworks & Libraries: Anchor (Solana), OpenZeppelin, Ethers.js, Web3.js, Web3.py, Tenderly. • Standards: ERC-20, ERC-721, ERC-1155, ERC-4626 (Vaults), ERC-4337 (AA), ERC-6551. 🌐 𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝 & 𝐔𝐈: • React.js, Next.js, Redux, Tailwind CSS, Shadcn/UI, Framer Motion, Three.js. 📊 𝐃𝐚𝐭𝐚, 𝐂𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬: • Databases: PostgreSQL, MongoDB, MySQL, OracleDB, Cassandra, Elasticsearch. • Infrastructure: Docker, Kubernetes, Terraform, Ansible, CI/CD (GitHub Actions, Jenkins). • Cloud Platforms: Google Cloud (GCP), AWS, Azure, Vercel, Render. 𝐘𝐨𝐮𝐫 𝐩𝐫𝐨𝐭𝐨𝐜𝐨𝐥 𝐝𝐨𝐞𝐬𝐧’𝐭 𝐣𝐮𝐬𝐭 𝐧𝐞𝐞𝐝 𝐭𝐨 𝐰𝐨𝐫𝐤—𝐢𝐭 𝐧𝐞𝐞𝐝𝐬 𝐭𝐨 𝐛𝐞 𝐢𝐧𝐯𝐮𝐥𝐧𝐞𝐫𝐚𝐛𝐥𝐞. Let's schedule a quick 10-minute strategy call to discuss your technical roadmap and how I can help you achieve a secure, gas-efficient, and production-ready application. 🔑 Keywords Blockchain Developer | Senior Blockchain Engineer | Smart Contract Auditor | Web3 Security Researcher | Solidity Expert | Rust Anchor Developer | DeFi Architect | Smart Contract Security | Ethereum Developer | Solana Developer | FastAPI Developer | Backend Architect | Gas Optimization Expert | ERC-4626 | Account Abstraction | Code4rena Auditor | Sherlock Auditor | Microservices Engineer | System Design Expert | Performance Tuning

Hi there! For the last 7 years I have been professionally helping clients turn their ideas into a product. With proven ability of understanding customers' needs and outside the box thinking I am always eager to do the things right. If you want energetic, positive thinking problem solver with always fresh ideas in mind, I'm your man. Among areas of my expertise you might be interested in: - Qt - C++ - Rust - Golang - Blockchain - Cryptocurrency - Mobile, Desktop and Crossplatform Development.

Through analysis of clients' unique needs and a strong business-focused mindset, we have built years of experience delivering custom software solutions and CRM implementations for a variety of industries. Whether you need custom-built software, assistance identifying the right CRM or ERP platform, or have no idea; I am here to help starting from our first call. Our skill-sets include: Python/Django development, expertise in the entire Zoho One platform, custom Wordpress/PHP development, custom Asterisk/PBX implementations, virtualization, and more. I look forward to providing you with an efficient and practical solution for your business.