First post — what I'm working on

First post — what I'm working on

Mar 25, 2026

Hey! Thanks for stopping by 👋

I'm currently heads-down on ksefuj.to — a free, open-source invoice validator for Poland's new mandatory e-invoicing system (KSeF). The deadline is April 1, 2026 and small businesses need tools that don't come with a paywall.

If you grabbed a coffee for me — thank you, it genuinely means a lot. More updates coming soon.

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