Marek
Lewandowski

Founder. Runner. Tinkerer.
Playing long games in AI, health, and capital.

About

Hey, I'm Marek. I founded and ran Semantive for ten years, crossing 100M PLN in cumulative revenue. Leading, operating, running the business.

Now I build directly, using Claude Code and Codex: personal software, agents, tools built around my own problems.

My interests: AI, thinking models, developer tools, personal software, business, investments, reading.

I play long games: health, capital, knowledge.

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MarekLewandowski