Bilal K.

AI SaaS Developer and Full-Stack Developer helping founders and CTOs launch SaaS platforms and MVPs on Next.js and NestJS, with Stripe billing and RAG/LLM features that hold up after launch. For four years I've built and scaled a production geospatial property-data SaaS platform used by enterprise teams including Redfin, CBRE and Moody's. I’ve also built a FinTech dashboard serving 100K+ users on Next.js and AWS. 𝗔𝗹𝘀𝗼 𝗵𝗶𝗿𝗲𝗱 𝗳𝗼𝗿: multi-tenant SaaS, Stripe subscription billing, payment gateway integration, prototype-to-production rebuilds, AI integration into existing platforms, and PropTech map apps. 𝗪𝗵𝗮𝘁 𝗜 𝗯𝘂𝗶𝗹𝗱 • SaaS MVPs and full-stack platforms: multi-tenant architecture, auth and roles, admin dashboards, CRMs and internal tools (Next.js, React, NestJS, Node.js, TypeScript) • Stripe integration: subscriptions, checkout, billing portals, webhooks, VAT and multi-currency, plus other payment gateways • AI features: RAG pipelines with citations, LLM integration with OpenAI and Anthropic APIs, document extraction, semantic search, AI agents • Backends and data: PostgreSQL and Supabase (row-level security, tenant isolation), MongoDB, REST and GraphQL APIs, Express.js, Python (FastAPI) • Real-time and integrations: WebSockets, Twilio, Strapi and third-party APIs • Deployment: AWS (EC2, ECS, S3, Lambda), GCP and Vercel 𝗥𝗲𝗰𝗲𝗻𝘁 𝘄𝗼𝗿𝗸 • Scheduling SaaS on Next.js, Supabase and Stripe, taken from prototype to production launch: app, website, billing, authentication, deployment and handoff • Multi-tenant subscription SaaS MVP, delivered and renewed into a second phase • Housing-intelligence map MVP for a PropTech startup (in progress) • Ongoing full-stack NestJS development for a long-term client platform • AI legal contract analysis platform built on RAG and LLM document extraction • Database pool exhaustion and expired-order cleanup fixed on a live Stripe checkout • Payment webhook stabilization for a payments-critical platform Top Rated Plus · 100% Job Success · $100K+ earned · 6,300+ hours on Upwork 𝗛𝗼𝘄 𝗜 𝘄𝗼𝗿𝗸 Scope first. We agree what launch needs and what waits for phase 2, then I review the architecture before any code is written. I use Claude Code and Cursor daily. They make me faster; they don't make the decisions. Code is reviewed before it reaches your repo, and I'll tell you where the model got it wrong. Sprint delivery with a written plan roughly every 10 working days and async Loom updates in between. I flag technical tradeoffs when I make them, not after they bite you. Post-launch support included. 𝗪𝗵𝗮𝘁 𝗰𝗹𝗶𝗲𝗻𝘁𝘀 𝘀𝗮𝘆 "He helped take the platform from an idea through development, testing and a successful production launch." - Scheduling SaaS founder, Oct 2026 "He handles payment-critical and backend tasks with a level of care and professionalism that genuinely makes a difference." - Backend client, Jul 2026 "He's extremely professional and very perfectionist in the best way." - SaaS MVP client, Nov 2025 Based in Pakistan, with reliable overlap with US mornings and EU afternoons. I usually reply within 4 hours. If you need an AI SaaS developer for a new product or a live platform, send a message or invite me to your job. I offer a free 30-minute technical strategy call before any engagement.