Work
Case studies & shipped products.
Client work written up as case studies — trade-offs included, not just the outcome. Plus the products I build under my own name.
Things I ship
My own products, in the wild.
Between contracts I build my own products and ship them. Not side projects — live apps, real users, running in production.
osiedlo.app
LiveFirst the district, then the flat.
Answer questions about your commute, your budget and how you live, and get a ranking of districts and suburbs in a Polish city, with a checklist for before you sign.
- Web
- Rankings
- Maps
Wyszczaj.to
LiveWhere to pee in Poland.
A nationwide, community-driven map of public toilets and places to relieve yourself — find the nearest one, anywhere in Poland.
- Web
- Maps
- Geolocation
FramePicker
LiveThe perfect still from any video, picked by AI.
Drop in a video and let AI pull the sharpest, best-framed shots — turn a gym clip into a clean photo without scrubbing the timeline.
- AI
- Video
- Web
Case studies
CASE STUDY 01 · OPEN SOURCE · C++ / JSI / SIMD
Making base64 fast enough to disappear
Three pull requests to react-native-quick-base64 that took base64 off the flamegraph in a production React Native image pipeline — shipped in v3.0.0.
CASE STUDY 02 · FULL-STACK · EVENT SOURCING
A full event-sourced backend in ten days
A per-section applause API for the Software Mansion engineering guide — backend, a remark AST plugin, and a sendBeacon delivery path — designed, built, and shipped end-to-end in ten days.
CASE STUDY 03 · AUTOMATION · WEB SCRAPING
Scraping 1,000+ venues from Google Maps
A Puppeteer scraper that replaced a manual Google Maps to Excel routine and gave a sales team a contact base of 1,000+ Kraków restaurants for the Festiwal Smaku, built during a vocational apprenticeship.
CASE STUDY 04 · FREELANCE · CMS / AI
A CMS matters more in the AI era
In 2022-2023 I built the website of BOR-KUR, a family-run broiler farm, in Polish and English. All of its content came from a CMS. The same split of content from design and logic is worth more now that AI agents edit websites.
CASE STUDY 05 · FREELANCE · WEB PRESENCE
A salon website built in one day
I built the website of Studio Fryzur Pasja, a hair salon, in one day. It's a one-page landing. A Google Business Profile, a pin on Google Maps and a Google Ads campaign put the salon where its customers search.
CASE STUDY 06 · IDEA · NOINDEX / REDIRECTS
Noindex pages make business simpler
A page or a redirect that search engines never list is the cheapest internal tool I know. It suits campaign links, admin panels and protected documents.