QA Lead · Software Engineer

Bartosz Kustra

I ship real apps, then try to break them. This is my digital garden — projects, experiments, and writing, all pushed straight from git.

Click the bug.

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Featured projects

Save the useful tabs and the thought that connects them, then pick up where you left off.

A calm, offline ball-line puzzle chasing Apple Design Award-level polish, down to the shaders and synthesized chimes.

A cozy idle-garden iOS game: tap, plant, prestige — the garden keeps growing while you're away.

A privacy-first iOS app for tracking your kid's fever and medication doses, with zero servers involved.

An AI Interviewed Me About AI
Sep 30, 2026

Anthropic's AI interviewer asked me about my wins with AI, the times it made things worse, and what I'd want it to change. What came out was a snapshot of where I actually stand: orchestrating instead of prompting, building my daughter a safe place to use AI, and refusing to trade human time for machine output.
Five Bugs Wearing One Error Message
Aug 18, 2026

toMatchAriaSnapshot fails, someone regenerates the baseline, CI goes green. Across nine triage sessions I found five distinct root causes hiding behind that one error string — and regeneration is the correct fix for exactly two of them.
A Week with Claude Code: A Field Manual
Jul 14, 2026

A seven-day field manual that takes you from installing Claude Code to running your own architect-plus-subagents setup, complete with model routing, distilled skills, and unattended cron jobs.