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pkafel/README.md

Hi, I'm Piotr 👋

📍 Berlin | 🛠️ Staff Engineer @ Wolt \ Doordash

Java Kotlin RxJava Kafka PostgreSQL

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.

My Projects

  • 🪵 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

GitHub Activity

GitHub Contribution Graph

What I'm Up To

  • 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

Latest Blog Posts

Connect

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  1. rx-java-examples rx-java-examples Public

    RxJava examples based on Java 8

    Java 6

  2. talks-box talks-box Public

    Subjective list of worth watching presentations regarding software development

    HTML 5 1

  3. falcon falcon Public

    Simple JSON diff web application

    JavaScript 3 1

  4. books-notes books-notes Public

    Notes from courses, books etc

    1 1

  5. json-diff json-diff Public

    Pure Javascript JSON diff library

    JavaScript 2

  6. educational-fixed-window-rate-limiter educational-fixed-window-rate-limiter Public

    Educational repo where you can find information about how to implement fixed window rate limiter. It also contains discussion points for cases when you have to implement it during interview.

    Java 7