Matthias Sax
Staff II Software Engineer at The Apache Software Foundation
Reno, Nevada, United States
Summary
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Rockstar🎓
Top School
Top expert inDistributed Data Systems and Analytics Technology
Matthias Sax is a Staff II Software Engineer with 11 years of experience specializing in distributed stream processing, currently leading the Kafka Streams team at Confluent. He holds a Ph.D. in computer science from Humboldt-Universität zu Berlin and combines deep academic rigor with pragmatic production engineering across Kafka, Flink, and Storm. An ASF committer and PMC member, Matthias has made notable contributions to high-profile projects such as KSQLDB and Apache Kafka core, and regularly presents at industry conferences like Kafka Summit and Flink Forward. Beyond backend systems, he contributes to project websites and documentation, reflecting a full-spectrum open source stewardship from tests and libraries to community-facing content. Based in Reno, Nevada, he bridges research, developer tooling, and operational reliability to help teams ship robust stream-processing platforms.
11 years of coding experience
Diplom (M.Sc.), Diplom (M.Sc.) at Humboldt University of Berlin
English, German
Stackoverflow
60,879reputation
3.6mreached
1,476answers
2questions
apache-kafka
top-1%
stream
top-1%
error-handling
top-5%
java
top-1%
apache-spark
top-5%
apache-flink
top-1%
Github Skills (39)
website-development10
apache-flink10
technical-writing10
rocksdb10
kafka10
flink-sql10
kafka-streams10
java10
scala10
rabbitmq10
stream10
javas10
html10
stream-processing10
apache-kafka10
Programming languages (9)
Github contributions (5)
apache/kafka
Mar 2016 - Dec 2022
Mirror of Apache Kafka
Role in this project:
Back-end Developer & DevOps Engineer
Back-end Developer & DevOps EngineerContributions:2327 reviews, 767 commits, 1828 PRs in 6 years 10 months
Contributions summary:Matthias contributed to implementing the RocksDBTimestampedStore and other classes and interfaces. They focused on fixing bugs and improving the stability of the ProcessorStateManagerTest. The user made commits that bumped the version to 2.3.0-SNAPSHOT. Furthermore, the user worked on improving the documentation by correcting formatting issues and by adding features.
apache-kafkakafka-consumerapachescalakafka
apache/kafka-site
Sep 2017 - Jan 2023
Mirror of Apache Kafka site
Role in this project:Technical Writer
Technical WriterContributions:18 reviews, 38 commits, 110 PRs in 5 years 5 months
Contributions summary:Matthias primarily contributed to the documentation of the Apache Kafka site. They added and updated content related to Streams API, including coding guidelines and developer guides. Additionally, the user made updates to the download links, release notes, and the upgrade guide for various Kafka versions, demonstrating a focus on maintaining and improving the documentation.
apache-kafkaapachedatastreambig-datascala
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