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.
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Featured projects
5balls
Work in progressA calm, offline ball-line puzzle chasing Apple Design Award-level polish, down to the shaders and synthesized chimes.
Bloom
Work in progressA cozy idle-garden iOS game: tap, plant, prestige — the garden keeps growing while you're away.
FeverBee
Work in progressA privacy-first iOS app for tracking your kid's fever and medication doses, with zero servers involved.
Latest writing
- 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.
- Verify Green or It Didn't Happen
Jul 2, 2026
How one un-negotiable verification gate — and a lessons file that never forgets — carried an iOS idle game from empty repo to feature-complete, mostly at 11pm.