Ugur K.

Product engineer with 5 years experience. Technical partner that shipped real products to the production where I scaled into +10K users. Whether you need an help, or want to build a product from scratch hit me up! SERVICES → Full-Stack Web Development: custom web applications and SaaS platforms from architecture to deployment. Next.js, React, TypeScript, Node.js, NestJS, REST APIs, PostgreSQL, Supabase, Firebase. → MVP Development for Startups: from idea to a production-ready MVP in weeks, with authentication, Stripe payments, dashboards, admin panels and analytics. → Mobile App Development: cross-platform iOS and Android apps with React Native and Expo, published to the App Store and Google Play. → Chrome Extension Development: browser extensions for Chrome, Safari and Firefox, with injected UI, content scripts and backend integration. → AI Integration & AI Agents: OpenAI / ChatGPT API, Claude API, Gemini, AI chatbots, RAG and semantic search with pgvector, LLM workflows, MCP servers, realtime voice with LiveKit. → Fix & Finish AI-Built Apps: Lovable, Bolt, v0, Replit or Cursor projects made production-ready. Bug fixing, Supabase RLS, security, performance and deployment. → Next.js Websites & Technical SEO: fast marketing websites, Webflow to Next.js migrations, headless CMS (Sanity), metadata and structured data. → Backend, Database & DevOps: API development, PostgreSQL optimization, ClickHouse, Redis, Kafka, Docker, Vercel, AWS, Railway, Hetzner, Cloudflare Workers. → Long-Term Development Partner: join your team for ongoing feature development, code review and maintenance. TECH STACK Frontend: Next.js, React, TypeScript, JavaScript, Tailwind CSS Mobile: React Native, Expo Backend: Node.js, NestJS, Hono, REST APIs Database: PostgreSQL, Supabase, Firebase, Drizzle ORM, Redis, ClickHouse, pgvector AI: OpenAI, Claude, Gemini, Vercel AI SDK, LangChain, LiveKit Cloud: Vercel, AWS, Cloudflare, Railway, Hetzner, Docker HOW I WORK • Discover: clear scope, plan and estimate before I start • Ship early: a working first version in production, so you see real progress • Operate: releases, monitoring, bug fixes and roadmap changes • Clean code that is typed, tested and documented. No lock-in: your team can own it. Send me a message with what you're building and I'll tell you how I'd approach it. *Keywords:* 🔸 Claude Code, Codex, ChatGPT, OpenCode, GLM 5.3, Gemini 🔸 Full Stack Developer - Next.js Developer - NestJS Developer - TypeScript Developer - Node.js Developer - React Developer - JavaScript Developer - Frontend Developer - Backend Developer 🔸 React Native Developer - Mobile App Development - iOS Developer - Android Developer - Cross-Platform Development 🔸 API Development - REST API - GraphQL API - Microservices - Backend Architecture - Server-Side Development 🔸 PostgreSQL Developer - Database Developer - Supabase Developer - Firebase Developer - Database Design - SQL - Prisma - TypeORM 🔸 AI Developer - AI Integration - LLM Integration - Claude API - ChatGPT Integration - OpenAI Developer - Gemini Integration - Machine Learning Developer 🔸 Chatbot Developer - Chatbot Development - AI Chatbot - Conversational AI - Customer Service Bot - Chat Application 🔸 Cloud Developer - AWS Developer - Serverless Developer - Lambda Developer - Cloud Architecture - DevOps Engineer - CI/CD 🔸 SaaS Developer - SaaS Development - Web Application Developer - Stripe Integration - Mollie Integration - LemonSqueezy Integration - Payment Gateway - Subscription Platform 🔸 Real-Time Developer - WebSocket Developer - Socket io - Live Chat - Real-Time Application - Event-Driven Architecture 🔸 Startup CTO - Technical Co-Founder - MVP Development - Product Development - Tech Lead - Engineering Manager 🔸 tRPC - Zustand - React Query - TanStack - Tailwind CSS - shadcn/ui - Fastify - Docker - Kubernetes