Ihor C.

I build AI-powered SaaS and assessment platforms on Next.js and Node.js. Latest: replaced a university-facing client's Qualtrics to Stata to Tableau pipeline with one platform and an AI report builder. 100% Job Success, Top Rated, $100k+ on Upwork. Recent builds: - Maritime crew marketplace on Next.js + Supabase, with paying customers. Lead developer. I turned a completed security audit into a sequenced plan and shipped it: RLS policies, Stripe, Cloudflare. - Assessment SaaS for a business serving universities. It replaced a Qualtrics to Stata to Tableau manual pipeline. Then I rebuilt an 8-month hand-built reporting engine as an AI report builder inside the platform. - Operations backend for a wellbeing company. Five fragile tools merged into one React and Node.js platform. The team now runs branded hubs for major film and streaming productions on it. What I do best: - Next.js development for SaaS: App Router, server components, Vercel - Node.js backends: APIs, integrations, PostgreSQL, Supabase - AI integration and AI agent development: OpenAI, Claude, RAG pipelines, agents that reach production - AI automation for your operations: LLM agents, RAG over your documents, OpenAI and Claude APIs, MCP servers. My team builds with AI agents every day, so you get senior-quality code faster and for less. - Full stack development with TypeScript end to end Senior full stack developer by trade. Most of it is Node.js developer work: the backends, APIs and integrations behind React and Next.js front ends. If you searched for a React Next.js developer, a Node.js backend developer, a full stack developer React Node, a Supabase developer, or a TypeScript developer, you are in the right place. Same person, same team. How I work: I start with your business logic, not the ticket list. If the project is smaller than you think, or should not be built yet, I will say so. That is why clients in the US, UK, Germany and Austria keep working with me. Not sure about scope yet? I run a fixed-price discovery: wireframes, technical requirements, and a budget you can hold me to, before you commit to a build. Most projects start there. Bigger build? I bring senior engineers from my own 20-person team. You still work with me directly. Tell me what you're building and where it's stuck. Keywords: Next.js Developer | Node.js Developer | Senior Full Stack Developer | Senior Node.js Developer | React Next.js Developer | Node.js Backend Developer | Full Stack Developer React Node | React | TypeScript | AI Integration | AI Agent Development | RAG | Supabase | PostgreSQL | SaaS Development | Web Application Development | Webflow Developer | AI Developer | AI Engineer | LLM Integration | OpenAI API | Claude API | AI Automation | Chatbot Development