Qaisar N.

I'm a full-stack developer who builds custom web applications and SaaS products with Next.js, React, and Node.js clean, scalable software built around your business, not off-the-shelf templates. My last platform grew to 600,000+ users. Most developers can write code. Fewer can build products that hold up under real traffic, stay maintainable as you grow, and actually move the business forward. That's the gap I fill I take ownership of a project end to end, so you're not managing me day to day. Where I really add an edge is AI: I integrate OpenAI and Anthropic into real, working products chatbots, assistants, automation, and AI-driven features that are reliable and cost-efficient in production, not just demos. I also help teams fix and scale AI-generated apps (Cursor, Bolt, Lovable, v0) into something they can actually launch. What I specialize in: Custom full-stack web apps & SaaS platforms (Next.js, React, Node.js, NestJS) AI integrations with OpenAI & Anthropic chatbots, automation, AI workflows Fixing and scaling AI-generated / prototype apps into production-ready products Debugging, performance optimization, and scaling existing codebases Why clients hire me: 20+ production projects across SaaS, AI tools, and eCommerce Built products serving 600,000+ users in logistics, healthcare, and business platforms End-to-end ownership clear communication, regular updates, no hand-holding needed Focused on clean, maintainable code and real business outcomes What I can build for you: ✔ Custom SaaS platforms, dashboards & web applications ✔ AI applications & integrations (OpenAI, Anthropic, chatbots, automation) ✔ Rescuing and scaling AI-generated / prototype apps into production ✔ REST APIs, GraphQL & third-party integrations (Stripe, etc.) ✔ Performance optimization, bug fixing & backend scaling How I work: I start by understanding your business goals, build in clean and scalable steps with regular updates, test thoroughly across devices, and stay available after launch. You get a long-term development partner, not just code. If you're building a custom product — or need someone to fix and scale an AI-built app that's stuck — send me a message and let's talk.