Building software
that people need.

Series of checkout automation modules targeting Pokémon card retailers across Europe — Farmers, Kmart, Warehouse, nl-website, catchyourcards, and rebelbot. Each module handles a different shop with custom anti-bot bypass (WOO Shield, capsolver), browser emulation, and proxy rotation. Built as Go CLI tools and a Wails desktop app depending on the use case.

Wrote the official client SDKs for the ParallaxAPIs service across Go, TypeScript, Python, and Playwright - providing clean, idiomatic integrations for each ecosystem against the same underlying API.

Sneaker reselling automation engine built in Go. Scans 20+ retail sites (Nike, Adidas, Zalando, JD Sports) for inventory, calculates arbitrage opportunities against StockX and Allegro pricing, and automates marketplace listings end-to-end. Features TLS-level anti-bot evasion, proxy rotation, concurrent goroutine scanning, and a REST API powering a management dashboard.

Full-stack platform for aggregating U.S. vehicle auction data (IAAI, Manheim) and automating WhatsApp marketing. Backend in Go with Gin handles concurrent scraping, real-time USD/PLN exchange rates via NBP API, and import cost calculations per shipping port and vehicle type. Frontend in Next.js with React Query provides a dashboard for bulk URL input, vehicle card display, showcase generation, and WhatsApp group management — with QR-based WhatsApp login via Whatsmeow.

SaaS platform for automating Vinted seller workflows - bulk price management, automated relisting, mass condition updates, and advanced sales analytics. Built with a Go backend, Next.js frontend, and a job queue system handling background automation at scale. Deployed on Kubernetes with CI/CD via GitHub Actions.