Ayaz K.

Are you building a SaaS platform, AI-powered application, MVP, marketplace, or custom web app — and need a developer who can take it from idea to production? I'm a Full-Stack Developer with 5+ years of experience and 350+ completed projects, specializing in SaaS, AI-powered applications, Next.js, React, Node.js, TypeScript, PostgreSQL, and Stripe. I help startups and growing businesses build production-ready products that are fast, scalable, secure, and maintainable. 🚀 What I Can Build ✅ SaaS Platforms & MVPs Multi-tenant SaaS applications, authentication, dashboards, subscriptions, RBAC, admin panels, onboarding and complete product workflows. ✅ AI-Powered Applications AI assistants, AI agents, chatbots, RAG systems, document intelligence and integrations using OpenAI, Claude, Gemini and modern LLM APIs. ✅ Next.js & React Applications Fast, responsive applications using Next.js, React and TypeScript with SSR, SSG, ISR and modern App Router architecture. ✅ Backend & API Development Scalable Node.js / Express / NestJS backends, REST APIs, GraphQL, authentication, webhooks and third-party integrations. ✅ Marketplaces & Platforms Multi-vendor platforms, dashboards, user management, payments, commissions and automated workflows. ✅ Existing Application Improvements Performance optimization, bug fixing, refactoring, architecture improvements, API optimization and production troubleshooting. 💳 Stripe & SaaS Billing Specialist I build complete Stripe payment infrastructure including: → Stripe Connect for marketplaces and vendor payouts → SaaS subscriptions and recurring billing → One-time payments → Customer Billing Portal → Trials, coupons and promotional pricing → Subscription upgrades and downgrades → Webhooks and event processing → Failed-payment and retry workflows → Secure Stripe Checkout → Platform fees and marketplace commissions 🤖 AI & Modern SaaS Development I can integrate AI directly into real production applications rather than building isolated demos. Examples include: → OpenAI / ChatGPT API integrations → Claude & Gemini integrations → AI agents and assistants → RAG and document-based question answering → Vector search and knowledge bases → AI-generated structured data → Automated business workflows → AI features inside existing SaaS products 🛠 Core Technology Stack Frontend React.js · Next.js · TypeScript · JavaScript · Tailwind CSS · Material UI · Redux Backend Node.js · Express.js · NestJS · REST APIs · GraphQL · WebSockets Databases PostgreSQL · MongoDB · MySQL · Supabase · Firebase Authentication JWT · OAuth 2.0 · Firebase Auth · Supabase Auth · Role-Based Access Control AI OpenAI · Claude · Gemini · LLM APIs · RAG · AI Agents · Vector Databases Payments Stripe · Stripe Connect · Subscription Billing · Webhooks Cloud & Deployment AWS · Vercel · Docker · CI/CD · VPS · Firebase · Netlify ✅ Why Clients Work With Me ✔ 5+ years of full-stack development experience ✔ 350+ projects completed ✔ End-to-end ownership from architecture to deployment ✔ Production-ready, maintainable code ✔ Strong experience with SaaS and payment systems ✔ Clear and proactive communication ✔ Comfortable working with existing complex codebases ✔ Performance, security and scalability considered from the beginning ✔ Available for ongoing development after launch I don't just implement tickets. I look at the product, architecture and business requirements and help identify the best technical approach before development begins. Have a Project in Mind? Send me: • What you're building • Your current tech stack, if any • The biggest technical problem you're facing • Any designs or requirements you already have I'll review the requirements and explain how I would approach the project.