Qaisar A.

Next.js and Node.js SaaS developer. Top Rated, 100% Job Success. I build multi-tenant SaaS products and AI automation systems that are stable in production, not just demos. What clients hired me for on Upwork: ▪ Hiring + client management SaaS (MERN, TypeScript) — long-term contract ▪ AI recruitment and WhatsApp automation platform — architecture to launch ▪ SaaS API architecture review and optimisation plan Products I've shipped: ▪ OrderFlow.delivery — multi-tenant delivery management SaaS ▪ STOCKITA — inventory & POS SaaS with AI insights (Next.js) ▪ MENTORA — AI-powered learning management system WHAT I BUILD ▪ Multi-Tenant SaaS — tenant isolation, roles, billing, admin dashboards (Next.js, Node.js, PostgreSQL, Supabase) ▪ AI Automation inside your SaaS — AI agents, LangChain, n8n workflows, WhatsApp and email automation ▪ APIs & Integrations — REST APIs, Stripe and PayPal payments, JWT/OAuth auth, third-party APIs ▪ Rescue & Scale — fix slow, broken or vibe-coded apps; refactor and deploy (Vercel, AWS, Supabase) Stack: Next.js, React, Node.js, Express, TypeScript, PostgreSQL, Supabase, MongoDB, Stripe, n8n, LangChain HOW I WORK ▪ Clear scope and milestones before code ▪ Clean, documented, production-ready code with error handling ▪ Loom walkthrough + docs at handoff ▪ 30 days of post-launch bug-fix support GOOD FIT IF YOU ▪ Need an MVP or multi-tenant SaaS built properly, fast ▪ Want AI agents or automation wired into an existing product ▪ Have an app that broke or slowed down under real users Send me the task. I'll tell you what's buildable, the stack, the cost, and what to skip. I reply within a few hours.