Work

Engineer at Flawless Payments, an African card acquirer building payment acceptance infrastructure for merchants across the continent.

Project manager for DeepFellow, an enterprise-grade, privacy-first framework for self-hosted AI deployments. Its modular stack (Infra, Server, and Enterprise Plugins) gives AI builders full data sovereignty, built-in compliance, and OpenAI-compatible APIs without the operational overhead of running models in-house.

A booking platform for Somatic Experiencing® supervision that moves at your pace. Practitioners schedule individual and group sessions with accredited SE supervisors online, with completed hours counting toward their certification.

A free desktop invoicing application with full integration with Poland's national e-invoice system (KSeF). Simplifies invoice creation, receipt, and synchronization while keeping all data stored locally in SQLite with no intermediary servers or subscription fees.

A web application that helps class treasurers run the school class fund. Treasurers split collections into installments and record payments and expenses, while parents check the fund status through a shared link without creating an account or installing an app.

Spent a decade building tools for Firefox developers, focusing on browser development infrastructure, debugging tools, and systems that empower the Firefox engineering team to create better browser experiences.

Co-founder of the world-changing online IDE that revolutionized how developers share and test code. JSFiddle became the second most popular online IDE globally, serving millions of users and transforming collaborative web development.

Co-founder of tools for psychotherapists and their clients. Therapists build personalized healing tales that bring a client's own experience into narrative therapy, and draw genograms mapping family patterns across generations.

My independent consulting practice helping organizations with collaborative software development, modern engineering practices, and technical transformation. Specializing in mob programming, testing methodologies, and team dynamics.

Worked with South African fintech leader building payment infrastructure and financial services. Contributed to systems handling high-volume transactions and payment processing across African markets.

Founder of a local village festival portal connecting communities across Poland. A digital platform celebrating traditional harvest festivals and helping preserve rural cultural heritage through technology.