About

I’m Darek, a software engineer based in London. I’ve been writing code since I was 11 and building things that people actually use since my teens.

My open-source roots run deep: three-time Google Summer of Code participant (2009-2011, Apache and Eclipse), Top Eclipse Contributor 2011, former EGit committer, and a top contributor to Gerrit Code Review, the code review tool used by Google, Android, Chromium, and other large-scale projects.

I’ve spoken at conferences across Europe and the US, including Gerrit User Summit (Mountain View), Confitura (Warsaw), FlutterLDN, and various Eclipse events. I co-organized DevCrowd (2012-2015), a developer conference in Szczecin, Poland.

After 18+ years of building software at companies like CollabNet in Berlin (2012-2018) and Adaptavist in London (2018-2023), I now work independently, contracting on mobile development and building in public.

Current focus: quantedge-ta, a streaming technical analysis library in Rust. Real data, real benchmarks, no compromises. Part of a longer journey building trading systems across three languages (Dart → Elixir → Rust) over five years.

I also built HabitChallenge, a habit tracking app with over 163,000 downloads on iOS and Android.

On this blog I write about what I’m actually building: Rust, mobile, distributed systems, and the gaps between what the docs say and what production looks like.

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