📍 Berlin | 🛠️ Staff Engineer @ Wolt \ Doordash
15+ years building and scaling systems, bridging business and engineering and growing the next generation of technical leaders. Previously Staff Engineer at Shopify and Tech Lead at Groupon.
- 🪵 timberlo.com - Discover skilled carpenters in your neighborhood on an interactive map
- 🃏 leetties.com - Swipeable flashcards that teach algorithms for coding interviews
- ⌨️ tabsvsspaces.sh - Put money where your mouth is in one of the most pointless debates of our time
- 🦅 falcon - Simple JSON diff web application
- 🧩 interview-cracker - Questions and solutions for technical interviews
- 🎤 talks-box - Curated list of worth-watching software development presentations
- 📚 books-notes - Notes from courses, books and publications
- 🎙️ Geekfest Berlin - [Archived] Meetup about everything tech (from mobile to backend) with a stellar lineup of speakers
- Building at scale - Working on Fintech (invoices, taxes and pricing) at Wolt
- Growing leaders - Mentoring engineers and fostering technical leadership
- Writing - Sharing thoughts on engineering and interviews at piotrkafel.com
- Generative AI for productive software engineers
- A game you cannot win
- About leetcode based interviews
- How to prepare for System Design interview
- Categorizing System Design interview types
