Serhii L.

It's 2026, and I'm back on UpWork after five years in a full-time role. Let's connect—greetings!👋 I offer a 30-minute consultation before any contract to kick things off. ㆍ12+ years of software engineering experience, deep expertise in the Node.js ecosystem ㆍBuilding real-time voice agents ㆍDeveloping multi-agent systems using LangChain, and Deep Agents ㆍImplementing AI automations and integrating LLMs into products and business workflows ㆍUsing Claude Designs to rapidly iterate on UI/UX ㆍDaily use of Claude Code and Codex for AI-assisted software development ㆍConsulting on AI architecture, code quality, and production readiness ㆍAuditing and fixing issues in AI-assisted (“vibe-coded”) applications ㆍFluent in English and experienced with Agile methodologies