Ko Turk is a Software Architect, Java Engineer, and Community Builder with more than 15+ years of experience in development, architecture, speaking, and building communities.

🦊 Voxxed Days Amsterdam conference organiser --> amsterdam.voxxedays.com

👥 JUGLeader @CodeLabJUG

🌱 Green Software Champion

🫶🏻 JFall Program Committee Member, DevoxxBE Community reviewer

🧑‍💻 Working @CodeLab, assignment @Rabobank.

🎤 Conference speaker, speaks about everything around Java (ok and Typescript 😄).

➡️ Website: http://koturk.nl/

Conference talks

(new) Job Processing in Java with JobRunr (2025) --> link

🇩🇪 JCON         (video / slides / code)

(new) From Space to Code: Using NASA's Open Data APIs with Kepler (2025) --> link

🇵🇹 JNation       (video / slides / code)

Maven's Hidden Secrets and Treasures to speed up your build (2024) --> link

🇵🇱 Devoxx Poland   (video / slides)
🇳🇱 Engineers Week   (slides)

Your frontend is ☠️ ⚠️ Let's measure its impact with CO2.js (2024 / 2025) --> link

🇨🇭 CERN                     (slides)
🇳🇱 JFall                   
🇧🇪 Devoxx Belgium               (slides / video)
🇳🇱 FrontMania                 
🇳🇱 Green Software Foundation NL Meetup  (slides)
🇳🇱 FortWierickerschans            (slides / code)
🇩🇪 Javaland                (slides)
🇳🇱 TeqNation                (slides / code)

The Future is 💚: A Journey through the Energy Efficient Design Principles of Software Engineering (2023/2024) --> link

🇳🇱 UtrechtJUG       (slides)
🇩🇪 Javaland       (slides)
🇳🇱 AmsterdamJUG   (slides)
🇷🇴 Voxxed Bucharest  (video / slides)
🇳🇱 JFall         (video / slides)
🇵🇹 JNation         (video / slides)
🇧🇪 Voxxed Brussels   (video / slides)
🇩🇪 JCON          (video / slides)

JVM energy consumption reports can be found here: link

The Art of Streaming, releasing your creativity with Apache Pulsar and Apache Kafka (2023)

🇺🇸 DevNexus        (slides / video)
🇵🇹 JNation       (slides / video)
🇳🇱 TeqNation;       (slides / video)
🇷🇴 Voxxed Bucharest;  (slides)
🇵🇱 Devoxx Poland;     (slides)
🇳🇴 JavaZone;      (slides / video)

Kafka Streams, nightmare or sweet dream? (2021/2022)

⭐️ JetBrains
🇵🇹 JNation
🇷🇴 Voxxed Bucharest
🇨🇭 Voxxed Ticino
🇩🇪 Javaland
🇪🇸 JBCNConf
🇹🇷 Java Day Istanbul
🇩🇪 JCON

How we build and migrated our Spring Boot applications to Kotlin (2022)

🇷🇴 Voxxed Cluj
🇳🇱 Kotlin Dev Day
🇩🇪 JCON

Controlling your race with Micrometer and Spring Boot (2020 / 2021)

🇸🇪 JFokus
🇺🇸 DenverJUG
🇩🇪 JCON
🇳🇴 JavaZone

The battle of the IDEs (2019) - first talk

🇩🇪 JCON
🇳🇴 JavaZone
🇪🇸 Greach
🇳🇱 UtrechtJUG

Badges

	top 3% of most active speakers for 2023
	Rabobank Community Member of the Month April 2024

Blogs & Articles

[🇬🇧] Meow moments, minimize the wait for your build to be completed!
[🇬🇧] Your frontend is ☠️ ⚠️ Let's measure its impact with CO2.js
[🇬🇧] Green Software Engineering: Best Practices
[🇳🇱] Kafka Streams, Dutch Java Magazine
[🇳🇱] Micrometer, Dutch Java Magazine
[🇬🇧] Latest trends and developments, Rabobank Engineers Week

Podcasts

Foojay
SDN Cast