Headline

Full-Stack Developer for Startups & Founders | I ship SaaS, AI & E-commerce products fast — Next.js · React · Node.js | Top Rated, 100% Job Success

About

I help startups and founders turn product ideas into live SaaS, AI, and e-commerce platforms — shipped, not just prototyped. Over the past 5+ years, I've worked with founders and teams across the US, UK, and Europe, building production software with Next.js, React, Node.js, TypeScript, and Supabase/PostgreSQL (plus MongoDB where it fits). A few things I've shipped recently: AI SaaS Usage & Billing Platform — a full-stack billing and usage system for an AI-powered SaaS product, with LLM usage tracking, credit conversion, and automated Stripe billing Multi-Tenant SaaS Platform for Neurodiversity Assessments — role-based dashboards for organizations, teachers, and students, with PostgreSQL Row Level Security enforcing tenant isolation Multilingual Luxury Chauffeur Booking Platform — a Next.js booking system with internationalization and integrated payments for a premium customer experience PerennialMath — a real-time math tournament platform with Socket.IO-powered live leaderboards and synchronized scoring Nail Shingaar & PunchRaksha — full-stack e-commerce builds on Next.js/Supabase with custom order flows, payment integration, and admin dashboards What I bring to a project: full-stack development end to end, multi-tenant SaaS architecture, real-time systems, payment integrations, and AI-assisted workflows (always disclosed transparently). I'm a Top Rated freelancer on Upwork with a 100% Job Success Score. I care about clean architecture, fast delivery, and building things that solve real problems — not things that just look good in a demo. Currently taking on a limited number of new freelance projects. If you've got a SaaS, AI, or e-commerce idea that needs to get built right, let's talk. 📩 nitinsapra.in or DM me here.

Location

Ludhiana

AI stack

claude code

claude

lovable

openai

Supabase

Vercel AI SDK

Work experience

Full-stack Developer at Upwork, Jan 2025 - Present · 1 yr 9 mos, Ludhiana, Full-Stack Developer Upwork · Freelance · Jan 2025 – Present Built and delivered production-grade web and mobile applications for clients across the US, UK, and Europe. Developed SaaS platforms with multi-tenant architecture, auth systems, and Stripe/Razorpay billing using Next.js and Node.js Built AI-powered apps integrating Claude API and OpenAI with real-time WebSocket messaging Delivered e-commerce solutions with custom storefronts, inventory management, and payment gateways Worked across the full stack — React, TypeScript, MongoDB, PostgreSQL, Supabase, AWS

Full-stack Developer at Fiverr, Jan 2025 - Present · 1 yr 9 mos, Ludhiana, Full-Stack Developer Fiverr · Freelance · Jan 2025 – Present Built and delivered production-grade web and mobile applications for clients across the US, UK, and Europe. Developed SaaS platforms with multi-tenant architecture, auth systems, and Stripe/Razorpay billing using Next.js and Node.js Built AI-powered apps integrating Claude API and OpenAI with real-time WebSocket messaging Delivered e-commerce solutions with custom storefronts, inventory management, and payment gateways Worked across the full stack — React, TypeScript, MongoDB, PostgreSQL, Supabase, AWS

Web Application Developer at Freelancer, Jan 2025 - Present · 1 yr 9 mos, Built production-grade SaaS, AI, and e-commerce platforms for startups and founders across US, UK, and Europe using Next.js, React, Node.js, TypeScript, MongoDB, and PostgreSQL. Designed and implemented multi-tenant architectures with strict data isolation using PostgreSQL Row Level Security and tenant-aware schemas. Integrated payment gateways such as Stripe for subscription billing and automated invoicing linked to usage-based credit engines. Implemented real-time systems using Socket.IO/WebSockets for live leaderboards, synchronized timers, and instant content updates. Delivered pixel-perfect Figma-to-code implementations and improved code quality via SonarCloud refactors and ESLint configuration.

Full Stack Engineer at Amdocs, Jul 2021 - Dec 2024 · 3 yrs 6 mos, Gurugram, Developed and maintained scalable web applications using the MERN stack (MongoDB, Express.js, React.js, Node.js). Designed and implemented RESTful APIs, integrated third-party services, and collaborated with cross-functional teams to deliver features through the full development lifecycle. Optimized application performance and implemented responsive UI components following best practices and code review processes. Participated in Agile ceremonies including sprint planning, stand-ups, and retrospectives to ensure timely delivery.

Education

Bachelor of Engineering - BE, Electronics and Communications Engineering, Thapar Institute of Engineering & Technology

High School Diploma, Bharathi Vidyalaya Sr Sec School

Public links

github: https://github.com/nitinsapra44