Adam R.

Senior Full Stack Developer building production-ready AI SaaS platforms. Specializing in AI integration, LLM, RAG pipelines, and scalable Next.js/Node.js architecture. With 6+ years of full stack development experience, Top Rated status on Upwork, and experience delivering full-stack applications from initial development to production, I focus on writing clean code, solving complex technical challenges, and building products that support long-term business growth. My Services : ✔ AI SaaS Architecture – LLM/RAG pipelines, vector search, and scalable backend ✔ Full-Stack Development ✔ React.js Development – Modern, responsive, component-based applications ✔ Next.js Development – App Router, SSR, server components, and performance optimization ✔ Node.js Development – Scalable backend systems and business logic ✔ TypeScript Development – Type-safe, maintainable frontend and backend code ✔ API Development & Integration – Secure APIs and third-party integrations ✔ SaaS Development – Multi-tenant platforms, dashboards, authentication, and subscriptions ✔ Payment Integration – Stripe subscriptions, checkout, and billing systems ✔ Authentication & Authorization – Secure login, user roles, and access control ✔ Deployment & Production Support – Vercel, Render, AWS, and modern deployment workflows ✔ AI Model Integration – OpenAI, LangChain, and custom model deployment Technologies I Work With : Frontend: React.js, Next.js, TypeScript, JavaScript, HTML5, CSS3, Tailwind CSS Backend: Node.js, Express.js, NestJS, Python, FastAPI, REST APIs Databases: PostgreSQL, Supabase, SQL, database design, Row-Level Security (RLS) Payments & Services: Stripe, third-party API integration, webhooks, authentication systems DevOps & Deployment: Git, GitHub, Vercel, Render, AWS, CI/CD, production deployment Why Work With Me? ✔ Top Rated Upwork Freelancer ✔ 6+ Years of Full-Stack Development Experience ✔ Experience Building SaaS Platforms, Marketplaces, and Web & Mobile Applications ✔ End-to-End Ownership: Frontend, Backend, APIs, Databases, and Deployment ✔ Clean, Maintainable, and Scalable Code ✔ Clear Communication, Reliable Delivery, and Long-Term Collaboration ✔ Delivered 30+ production SaaS apps with 99.9% uptime Whether you need a Full Stack Developer for a new SaaS product, an experienced React, Next.js developer for your existing platform, a Node.js backend engineer, or help integrating LLM/RAG pipelines and AI agents, I can help you move from requirements to a working production application. Let's discuss your project. Send me your requirements or existing application details, and let's identify the best way to build, improve, and scale your product.