Sandaruwan J.

Full Stack Developer | React.js, Node.js, Next.js | SaaS MVP & AI

I build production-ready Full Stack web applications - SaaS platforms, MVP products, eCommerce systems, and admin dashboards - using React.js, Next.js, Node.js (Express/NestJS), and Java Spring Boot. Top Rated on Upwork with a 100% Job Success Score and perfect 5.0 rating across all clients. ━━━ WHAT I BUILD FOR YOU ━━━ SaaS MVP from scratch: database design, REST API, user auth, admin dashboard, Stripe billing, deployment React / Next.js frontends: responsive UI, SSR/SSG, SEO-optimized pages, Figma-to-code, TypeScript Node.js & Spring Boot backends: secure REST APIs, role-based access control, real-time data, webhooks eCommerce & admin portals: product management, order flows, payment integration, analytics dashboards Third-party integrations: Stripe, payment gateways, OAuth, external APIs, microservices Performance optimization, bug fixes, code reviews, and long-term maintenance ━━━ TECH STACK ━━━ Frontend: React.js, Next.js, TypeScript, JavaScript (ES6+), Tailwind CSS, Redux Backend: Node.js, Express.js, NestJS, Java, Spring Boot, REST API, GraphQL Database: PostgreSQL, MySQL, MongoDB - schema design, query optimization, migrations DevOps & Cloud: Docker, AWS (EC2, S3), CI/CD pipelines, Vercel, Heroku Payments: Stripe subscriptions, one-time payments, webhooks, billing portals ━━━ HOW I WORK ━━━ Start with a short scoping call or message to lock down requirements, data model, and milestones upfront - no surprises. Deliver in milestones with check-ins so you always know progress and can course-correct early. Hand off clean, documented code. Available for post-launch support. I reply within 1 hour. Send me your requirements, wireframes, or repo and I'll respond with a clear plan, timeline, and honest risk assessment. Full stack developer | React developer | Next.js developer | Node.js developer | MERN stack developer | JavaScript developer | TypeScript developer | SaaS developer | MVP developer | Spring Boot developer | NestJS developer | API developer | eCommerce developer | Admin dashboard developer | React Next.js Node.js developer | Full stack SaaS MVP | Spring Boot REST API developer | Stripe payment integration developer | PostgreSQL Node.js developer