Hire the Best Bitcoin Developers

I build production grade systems at the intersection of Web3, fintech, and AI from high frequency trading infrastructure to DeFi protocols and ML powered signal engines. Recent work includes a perpetual DEX built from scratch comparable to Hyperliquid, a high frequency trading bot on Polymarket's BTC prediction market using real time CLOB streams and millisecond latency execution, and ML models trained to find correlations across thousands of markets to generate trading signals seconds before a market moves. I've also built and scaled a crypto exchange handling 20 million transactions daily with zero security incidents over six years. On the AI development side, I build and deploy LLM powered applications using OpenAI, Anthropic, and open-source models (LLaMA, Mistral). This includes RAG pipelines with vector databases (Pinecone, Weaviate, pgvector), AI agents and tool use workflows with LangChain and LlamaIndex, fine tuning models for domain specific tasks, and integrating AI layers into trading systems for signal filtering and adaptive strategy logic. On the fintech and payments side, I've worked directly with Transak, MoonPay, and Paybis including a year long direct collaboration with the Paybis team across two projects integrating card, Apple Pay, and Google Pay flows into Binance scale platforms. I've built full KYC pipelines via Sumsub, crypto wallet infrastructure with multisig key management, and mobile apps for iOS and Android in the crypto and payments space. Infrastructure wise, I design for scale from the start — Kubernetes, EKS, microservices, clustered databases, Kafka, and the full AWS stack. Security is treated as a core requirement, not an afterthought, across every fintech and blockchain system I've shipped. Core areas: Web3 / DeFi / Solana / EVM · HFT & algorithmic trading · ML/AI for trading signals · LLM integrations · RAG & AI agents · Crypto exchange development · Fiat onramp integrations · Cloud infrastructure (AWS, GCP) · Mobile (React Native, iOS, Android) · Smart contracts (Solidity, Hardhat, Foundry)

I build fast, scalable, and high-performance web applications using React.js, Next.js, and Node.js, with a strong focus on full stack development. Specialized in SaaS platforms and AI-powered web applications. Hi, I’m Vatsal — a Full Stack Developer with 2+ years of experience helping startups and businesses turn ideas into modern, production-ready web applications. I focus on building clean, scalable systems that are optimized for performance, security, and long-term growth. I have hands-on experience developing SaaS products, AI-integrated applications, and full-stack platforms using modern technologies. Whether it’s building from scratch or improving an existing system, I ensure efficient architecture and smooth user experience. - Why Founders Choose Me: I help startups scale by building premium web applications with an AI-first approach. As a Full Stack Developer, I use Next.js, Tailwind CSS, and modern backend technologies to architect robust systems designed for growth, performance, and long-term ROI. What I Can Help You With: • Full Stack Web Development (Frontend + Backend) • React.js & Next.js Development (SSR, performance optimization) • Node.js & API Development (REST, GraphQL) • SaaS Application Development • AI Integration (OpenAI, automation, chatbots) • Database Design (MongoDB, PostgreSQL, Supabase) • Authentication & Security (JWT, OAuth) • Bug Fixing, Optimization & Scaling - Tech Stack: React.js, Next.js, JavaScript, TypeScript Node.js, Express.js, Nest.js MongoDB, PostgreSQL, Supabase Tailwind CSS, REST APIs, GraphQL AWS, Vercel, Docker I write clean, maintainable code and follow best practices to deliver reliable and scalable applications. My goal is not just to build features, but to create solutions that bring real value to your business. ✔ Clean & scalable architecture ✔ Fast, responsive, and SEO-friendly apps ✔ Clear communication & on-time delivery ✔ Long-term support and collaboration 📩 Ready to build your project? Send me a message or invite me — I respond quickly. 🔧 EXPERTISE: Full-Stack Development | Next.js | React | Supabase | Tailwind CSS | AI Integration | AI Implementation | PostgreSQL | API Design | SaaS | MVP Development | Scalable Architecture | UI/UX Design' ✅ Keywords: Full Stack Developer | Senior Full Stack Developer | SaaS Platform Developer | MERN Stack Developer | React.js Development | Next.js Development | Node.js Backend Development | TypeScript Applications | API Integration Specialist | Supabase Developer | PostgreSQL Developer | MongoDB Developer | JavaScript Expert | Dashboard & Admin Panel | Marketplace Developer | Internal Tools | Booking Systems | eCommerce Solutions | Performance Optimization | Ongoing Product Support

10 years of progressive work experience in software development and product management in the fintech industry. Interested in AI and Web3 projects. I design and build AI-powered applications. Hold Bachelor's degree in Computer Science. Live in Calgary, Canada. • AI: Google AI Studio, Gemini API, Imagen for generative image pipelines, Anthropic Claude API, OpenAI API for LLM integration, prompt engineering, AI-powered product development • AI-Assisted Dev Tools: Claude Code, GitHub Copilot, Codex • Web3: Solidity, Foundry, Web3.js/Ether.js, ERC-20, ERC-721, EVM, dApps, DeFi, NFT, Blockchain APIs • Languages: HTML/CSS, JavaScript, TypeScript, JSON, PHP, MySQL, PostgreSQL, Python • Developer Tools: Next.js, Git, Figma, Jira, Trello, Scrum, Cloudflare, Azure, Visual Studio Code

I have 12 years of experience as a crypto-focused journalist, analyst, and content strategist, while also branching out into tech and finance more generally. During this time, I've connected with both mainstream financial audiences at Forbes, Fortune, and Investopedia and more technically-oriented readers at crypto-focused media outlets like Bitcoin Magazine and CoinDesk. Additionally, my writings and analyses have been cited by Bloomberg, the New York Post, Wired, and many other well-known media brands. I’ve also garnered more than 50,000 followers on my personal X account, including many of the most prominent names in Bitcoin. My work has been praised by everyone from the technically-minded Bitcoin Core developers to the executives running some of the largest crypto businesses.

I work with startups and businesses to build blockchain products, AI-powered systems, and scalable web applications that are designed for real users ........... not just technical demos. Over the last 8+ years, I’ve helped clients develop everything from DeFi platforms and crypto wallets to automation systems, AI integrations, and full-scale SaaS products. My focus is always on building products that are secure, practical, and ready to grow. I enjoy working closely with founders and teams who care about creating solid long-term products, whether that means launching a new Web3 platform, improving an existing application, or integrating AI into business workflows. Areas I Commonly Work On Blockchain & Smart Contract Development Web3 Applications AI Agents & Workflow Automation DeFi & Crypto Platforms NFT & Tokenization Projects Full-Stack SaaS Development API & Backend Architecture Product Scaling & Optimization Tech Stack Blockchain: Solidity, Ethereum, Solana, Rust, Hyperledger, Web3.js, Ethers.js Frontend: React.js, Next.js, TypeScript, TailwindCSS Backend: Node.js, NestJS, Python, Go, REST APIs What You Can Expect Working With Me Clear communication Reliable delivery timelines Clean, maintainable code Attention to performance and scalability A practical approach focused on business goals I prefer building long-term working relationships and contributing to projects where thoughtful engineering and product quality actually matter. If you have an idea you’re exploring or a product you want to improve, feel free to reach out.

I've built production systems serving 100,000+ users and currently lead engineering as CTO of a SaaS platform — so I bring senior-level architecture, not just code. Need a backend or full-stack engineer who ships fast without breaking what already works? I build production NestJS/Node.js APIs, Next.js web apps, and tricky third-party integrations (Stripe, GoHighLevel, Phorest, Zapier, PayFast) that other developers got stuck on. Hi 👋 I'm Rafique — a Top Rated AI-Native Full Stack Engineer with 100% Job Success on Upwork. I have 5+ years of experience building backend services, REST APIs, and SaaS platforms for startups and growing teams. Most of my work falls into one of three buckets: shipping new MVPs quickly, fixing and scaling existing apps, or building the integration layer that connects your product to the tools your business actually runs on. My core stack: 🔧 Backend: Node.js, NestJS, TypeScript, REST APIs, PostgreSQL, MongoDB, Prisma 🎨 Frontend: Next.js, React, TypeScript ☁️ Infra & Tools: AWS (Lambda, Cognito), Vercel, GitHub 🧠 AI-Native Workflow: Claude, Codex, and Cursor — used where they reduce bugs and ship faster, not as a replacement for clean architecture What clients hire me for: ✅ NestJS + Node.js backends with secure authentication and clean REST APIs ✅ Stripe, GoHighLevel, Phorest, PayFast, and Zapier integrations ✅ Next.js full-stack apps (auth, dashboards, SaaS MVPs) ✅ Performance, migrations, and stabilizing existing codebases ✅ Clear estimates, proactive updates, no surprises Recent client feedback: ⭐ "Rafique ROCKS — something I was trying to do on my own for hours and hours, he just did it." — Phorest → GoHighLevel integration ⭐ "Best developer to work with — extremely technical, patient, good communication, and most importantly knows his code. Definitely gonna hire again." — PayFast / Next.js integration ⭐ "He delivered high-quality authentication features, communicated clearly, and was very patient and professional." — NextJS + NestJS auth setup Send me a short message about what you're building or what's broken. I'll reply within 4 hours with a clear plan, realistic timeline, and an honest answer on whether I'm the right fit — no fluff, no sales pitch.