Vipin A.

Senior Full Stack Developer | SaaS, AI & Product Engineering

$200K+ EARNED ON UPWORK | 590 COMPLETED CONTRACTS | TOP RATED I build production-ready SaaS platforms, marketplaces, booking systems, business applications, and AI-powered products — from architecture and backend APIs to web applications, mobile apps, integrations, and cloud deployment. I'm a Senior Full Stack Developer with 12+ years of experience building software for startups, growing businesses, and established companies. My focus isn't simply writing code. I help turn business requirements into reliable, scalable products that can operate in the real world. WHAT I CAN HELP YOU BUILD • Multi-tenant SaaS platforms • AI-powered applications and workflow automation • Marketplaces and booking/reservation platforms • Business dashboards and internal management systems • REST APIs and third-party integrations • Subscription, billing, and payment workflows • Web + mobile platforms with shared backend infrastructure • Existing application modernization and feature development FULL-STACK DEVELOPMENT I work across the complete product lifecycle — from database and backend architecture to frontend development, integrations, deployment, and ongoing improvements. Frontend: Next.js, React, Vue.js, TypeScript, JavaScript, Tailwind CSS Backend: Node.js, Express.js, Laravel, PHP, REST APIs Mobile: Flutter for iOS and Android Database: PostgreSQL, MySQL, MongoDB, Supabase, Firebase Cloud & DevOps: AWS, DigitalOcean, Docker, Nginx, Git AI INTEGRATION & AUTOMATION I integrate AI into existing and new software products using technologies such as OpenAI, Claude, LLM APIs, RAG, AI agents, tool/function calling, and workflow automation. My approach is application-first: AI needs reliable APIs, permissions, structured data, business rules, error handling, monitoring, and maintainable architecture around it. I can help with: • LLM integration into SaaS and business applications • AI agents connected to APIs and application tools • RAG and knowledge-based AI workflows • Structured AI outputs and function/tool calling • AI-assisted business process automation • Integration of third-party AI services into existing products PRODUCTION PRODUCT EXPERIENCE My portfolio includes platforms such as Zerzura Experiences, PetBae, LEND-IT.CA, SkyTradr, Nestwel, Parkteufel, and BookMyMandap. These projects cover marketplaces, booking and reservation systems, operations platforms, web and mobile applications, payments, external API integrations, and complex business workflows. WHY WORK WITH ME? • 12+ years of software development experience • $200K+ earned through Upwork • 590 completed Upwork contracts • Top Rated status • End-to-end product development experience • Strong backend, frontend, database, API, and mobile expertise • Practical AI and LLM integration experience • Experience building and maintaining production applications • Clear communication and long-term development support If you need a developer who can understand your business requirements, design the technical solution, and take ownership across the full stack, send me a message with what you're building.