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)

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 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

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.

🟢 AVAILABLE TODAY, JUNE 8 ⚡ Message me "AUDIT" - get a free 30-min technical review of your app idea, architecture, or existing codebase. No sales pitch. Just honest engineering feedback. I'm Siarhei - ex-CTO × 3 funded startups, CEO of Sparkler Soft. We build native iOS & Android products that ship, scale, and raise. 🔵 PROVEN RESULTS ◈ iHairium - AI Hair Diagnostics (live on App Store) Neural network · 100K+ training images · 95-98% accuracy $600K angel round + $5M seed valuation Revenue ×10 to ×1000 per month in early stages Google & Amazon grants · 1,000+ clinic partners onboarded ◈ Eco-Go - Electric Scooter Sharing Platform iOS + Android + Backend + IoT + Admin Panel AWS IoT Device Management · Swappable battery infrastructure Named "Best Startup of the Region" ◈ Optics Platform [White-label · Strict NDA] AI-assisted frame & lens selection via device camera Active in 60+ countries · 1,000+ fitting points worldwide 10+ years on market · Award-winning at international exhibitions ◈ Chibbis - Unified Food Delivery Service 600+ restaurants · 150+ cities across Russia iOS + Android + Web + Admin Panel + CMS One of the country's leading delivery platforms ◈ CoinForShop - Crypto Marketplace iOS + Android + Web (React) Non-custodial wallets · Smart contract payments BTC · ETH · BCH · LTC · XMR · TRX · 100% MVP delivered ◈ Azarium - NFT Real Estate Investment Platform Fractional property ownership via blockchain MAS-regulated · Live construction webcam in-app Min investment from $200 · Expected ROI 30–60% 🟠 WHAT WE BUILD → HealthTech & AI On-device ML · Camera diagnostics · Neural networks TensorFlow Lite · Core ML · OpenCV → FinTech & Crypto Wallets · KYC/AML · Stripe · Smart contracts · NFT → Mobility & IoT GPS · BLE · AWS IoT · Scooter & bike sharing Telematics · Real-time fleet management → Marketplace & Delivery Full-stack: app + backend + admin panel + CMS → API Integrations Stripe · Mapbox · Sumsub · Firebase · any third-party 🟡 TECH STACK Mobile: Swift · SwiftUI · Objective-C · Kotlin · Java Backend: Java Spring Boot · Node.js · NestJS · Golang Frontend: React · Next.js AI/ML: TensorFlow Lite · Core ML · OpenCV Cloud: AWS · GCP · Azure · Docker · Kubernetes · CI/CD Data: PostgreSQL · MongoDB · Redis · Elasticsearch Security: OAuth2 · OIDC · JWT · Keycloak · Biometrics · IAP 👉 Message "AUDIT" right now - 30 minutes to understand if we're the right fit. No obligation. No pitch. Just clarity.

Shamlatech: Enterprise AI & Web 3.0 Solutions Experts Unlock the future with Shamlatech—your trusted partner for Web 3.0 and AI-powered digital transformation. We build next-generation products for startups, enterprises, and investors, combining world-class blockchain engineering and artificial intelligence with industry expertise. 🔗 Web 3.0 Product Highlights RWA Asset Tokenization: Transform real-world assets like gold, real estate, and commodities into blockchain tokens, enabling fractional ownership, liquidity, and global accessibility. Our platforms support tokenization of physical and financial assets, including gold (ERC20/ERC721), real estate, and funds, with regulatory-compliant solutions for secure, seamless digital markets. L1/L2 Blockchain Development: Expertise across Ethereum, Solana, Avalanche, Polygon, and custom Layer 1 blockchains, plus advanced Layer 2 scaling solutions (rollups, bridges, sidechains). Features include smart contract development, cross-chain interoperability, on-chain governance, and DeFi protocol architecture. Hybrid Crypto Exchanges: Launch robust, compliant crypto exchanges blending the speed and liquidity of CEX with the transparency and control of DEX. Solutions feature fiat on-ramp, multi-chain support, secure wallet management, advanced trading analytics, and integrated KYC/AML modules. 🤖 AI Automation Services Healthcare: Automate patient data processing, predictive diagnostics, and medical imaging with machine learning and AI-powered chatbots for appointment scheduling and insurance. Enhance healthcare workflows with scalable, secure solutions. Ecommerce: Boost customer engagement and retention using AI for personalized product recommendations, dynamic pricing, fraud detection, and advanced conversational agents for automated support and order management. Crypto & Web3: Power trading and compliance with market signals bots, predictive analytics, AI-driven KYC/AML automation, and smart contract management for efficient token launches and risk reporting. Why Choose Shamlatech? Comprehensive Web 3.0 Expertise - Blockchain developments(L1/L2), DeFi, NFT, Asset tokenization(RWA), Hybrid crypto exchanges(Margin & Perpetual), smart contracts, Crypto Wallet developments, Crypto Payment Gateway, Crypto Trading Bots and automation. And AI Expertise - Machine Learning Model Development Generative AI Natural Language Processing (NLP) Solutions Computer Vision and Image Recognition Data Analysis and Visualization AI Consulting and Strategy Custom AI Application Development Model Deployment and Maintenance Proven Track Record: Delivered 170+ breakthrough projects in Fintech, gold trading, real estate, healthcare, wellnes, Retail & Gaming. Security & Compliance: Stringent audits, privacy modules, and regulatory adaptability across global jurisdictions. End-to-End Partnership: From strategy & architecture to deployment and ongoing support, we empower digital growth with transparency. Bring your vision to life with Shamlatech. Contact us for a free strategy session, demo, or to scale your Web 3.0/AI project with proven experts.