# Oleh Vanin - exsesx.dev

> Personal portfolio of Oleh Vanin, a senior full-stack engineer and AI engineer based in Poland, building scalable product systems with React, Next.js, Node.js, Go, cloud infrastructure, and LLM workflows.

Specialties: Node.js / Nest.js, React / Next.js, Go services, MCP integrations, LLM workflows, Developer tooling, AWS / GCP.

## Projects

- [All projects](https://exsesx.dev/projects): Index of selected work
- [ControlUp](https://exsesx.dev/project/controlup): A Digital Employee Experience platform where I'm building the AI Assistant from scratch: MCP servers, multi-agent tooling, and LLM pipelines on Foundry.
- [Quicklizard](https://exsesx.dev/project/quicklizard): An AI-powered dynamic pricing platform where I owned full-stack delivery: Next.js workflows, Go services, and rollouts behind feature flags.
- [Tso Chinese](https://exsesx.dev/project/tso-chinese): Dark-kitchen automation software where I designed the TSO 3.0 architecture, moving to microservices and rewriting the REST APIs as GraphQL.
- [Clear Street Bank](https://exsesx.dev/project/clear-street-bank): Banking product work where reliability and restraint mattered more than flash. The specifics stay private.
- [CoinMENA](https://exsesx.dev/project/coinmena): A UAE-based cryptocurrency application where I implemented asynchronous frontend architecture for real-time verifications and updates.
- [This is Language](https://exsesx.dev/project/this-is-language): A language-learning platform where I built scalable backend features around video transcoding, learning puzzles, and a multiplayer game.
- [Huddle](https://exsesx.dev/project/huddle): Household utility management work where I adapted from Angular.js to React and worked closely with PostgreSQL stored procedures and PostGraphQL.

## CV

- [Resume (PDF)](https://exsesx.dev/api/resume/pdf): Current CV as a PDF

## Contact

- [GitHub](https://github.com/exsesx)
- [LinkedIn](https://www.linkedin.com/in/exsesx/)
- [Book a call](https://cal.com/exsesx/meet): Cal.com scheduling link