Nico Kruber
Senior Software Developer at The Apache Software Foundation
Berlin, Germany
Summary
🤩
RockstarNico Kruber is a senior software developer with 13 years of experience specializing in distributed, stateful stream processing and a long-running commitment to Apache Flink where he became a committer after contributing since 2016. Currently at Confluent in Berlin, he focuses on backend engineering for high-throughput, low-latency systems and has deep expertise in Flink’s network stack, metrics, and SSL/Netty integration. His background includes research-driven work on scalable transactional key-value stores (Scalaris) and multilingual contributions in Erlang and Java, reflecting strong systems-level thinking. An active open-source contributor, he has improved Flink’s observability and security testability and also helps maintain the project’s website and community tooling. Notably, he blends academic distributed-systems experience with pragmatic production engineering, often addressing subtle performance and monitoring gaps that surface at scale.
13 years of coding experience
Stackoverflow
111reputation
3kreached
7answers
0questions
Github Skills (19)
content-management-system10
website-development10
apache-flink10
big-data10
flink-sql10
network-programming10
java10
javas10
content-management10
gradlew10
metric10
gradle10
openssl9
scala8
testing8
Programming languages (11)
Github contributions (5)
apache/flink-web
Aug 2018 - Sep 2021
Apache Flink Website
Role in this project:
Back-end Developer & Community Contributor
Back-end Developer & Community ContributorContributions:1 review, 19 commits, 25 PRs in 3 years 2 months
Contributions summary:Nico primarily contributed to the Apache Flink website, focusing on content updates and code enhancements. They added a new committer to the community page, implemented a Gradle quickstart script, and rebuilt the website with updated content, including blog posts and documentation links. They also made hotfixes to improve the local build process by updating URLs and removing unnecessary build options.
flinkapachebig-datasparkapache-flink
apache/flink
Aug 2018 - Nov 2022
Apache Flink
Role in this project:Back-end Developer
Back-end DeveloperContributions:28 reviews, 121 commits, 350 PRs in 4 years 4 months
Contributions summary:Nico primarily focused on enhancing the Apache Flink codebase, particularly in areas related to metrics and network performance. Their contributions involved adding and refining metrics for input/output buffers and subpartition logging, improving the monitoring capabilities of Flink. Furthermore, the user was instrumental in enabling OpenSSL tests within the framework, which improved security. The user also refactored the SSL configuration for Netty, making it more aligned with its intended usage.
pythonflinkconnectorsqlapache
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