Currently shipping kryptopodatki.pl · Warsaw · 2026

Andrzej
Kobyliński

Full-stack engineer in Warsaw. Building kryptopodatki.pl — a crypto-tax platform for Polish individuals. Alongside and before: Kotlin/Ktor backends, Next.js frontends, OSS in the Kotlin community (contributor to softwaremill/okapi).

I build what I'd use. If I wouldn't, I don't ship.

Currently building

Closing v1 of kryptopodatki.pl — a tax-filing platform that turns a year of crypto trades into a ready-to-submit annual return. Alongside: ariettacars.com in build — a marketplace platform for car listings with full PWA support.

product building

kryptopodatki.pl

Crypto-tax platform for Polish individuals and IT contractors.

product building

ariettacars.com

Marketplace platform for the car industry — bilingual web + PWA.

OSS & tooling

Contributor to softwaremill/okapi — a Kotlin transactional outbox library, Apache 2.0. Plus nozbe-classic-mcp on npm — an MCP server for Nozbe Classic.

oss live