Jan Heise
Senior Software Entwickler at Graylog, Inc.
Hamburg, Germany
Summary
🤩
Rockstar🎓
Top SchoolJan Heise is a senior software engineer based in Hamburg with 13 years of professional experience and decades more as a J2EE-focused freelance lead developer and architect. Currently at Graylog, he contributes backend expertise to open-source log management, notably improving Elasticsearch integration and legacy API behavior in the widely used Graylog2 server. His work spans deep server-side systems, configuration and parsing logic, and pragmatic fixes that reduce operational noise such as deprecation warnings. Trained in computer science and visual communication, he brings a rare combination of technical rigor and design-aware thinking to system architecture. Comfortable leading projects of varying scale, he consistently bridges long-term maintainability with practical, production-focused improvements.
13 years of coding experience
Informatik, Informatik at University of HamburgVisuelle Kommunikation, Visuelle Kommunikation at Hochschule für Bildende Künste Hamburg
English
Github Skills (12)
javas10
elasticsearch10
elasticsearchquery10
aws-elasticsearch10
back-end-development10
java10
elasticsearch-api10
amazon-elasticsearch10
logging9
apidoc7
api7
opensearch6
Programming languages (9)
Github contributions (5)
Graylog2/graylog2-server
Mar 2021 - Jan 2023
Free and open log management
Role in this project:
Back-end Developer
Back-end DeveloperContributions:470 reviews, 242 commits, 545 PRs in 1 year 10 months
Contributions summary:Jan primarily contributed to the back-end functionality of the Graylog2 server, focusing on implementing features to improve Elasticsearch integration and log management. Their work included adding configuration options, implementing filters to mute Elasticsearch deprecation warnings, and renaming default version constants. Furthermore, the user addressed issues related to the legacy API, specifically fixing the semantics of limits and changes in the `scroll` method. Additionally, they made modifications related to the NaturalDateParser and added the ability to check for a value in a string list in a lookuptable.
log-viewerloggingloggersecure-loggingsyslog
janheise/zentral
Mar 2018 - Jun 2018
Zentral is a framework to gather, process, and monitor system events and link them to an inventory.
Contributions:9 pushes in 2 months
inventoryeventsmonitorsystem-monitorlink
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