Oliver Zeigermann
Machine Learning Engineer at Techniker Krankenkasse
Hamburg, Germany
Summary
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RockstarOliver Zeigermann is a Machine Learning Engineer based in Hamburg with 13 years of experience building production-grade software and data-driven systems. He combines hands-on ML engineering at Techniker Krankenkasse with leadership experience as Head of Artificial Intelligence at OPEN KNOWLEDGE, bridging research, productization, and team coordination. His background includes long-term consulting and freelance work, giving him a pragmatic focus on reliable, maintainable solutions across the stack. An active open-source contributor, he improved performance and auth flows in the well-known Graylog log-management project by optimizing dashboard widgets, caching, and reducing concurrent requests. He excels at turning complex analytics requirements into efficient, user-facing features and has a proven track record of improving system performance under real-world constraints. Colleagues rely on him for pragmatic technical leadership that balances speed, scalability, and operational robustness.
13 years of coding experience
9 years of employment as a software developer
Github Skills (10)
javascript10
react10
front-end-development9
dashboard8
back-end-development8
backend8
log-analysis7
server7
logger7
logging7
Programming languages (12)
Github contributions (5)
Graylog2/graylog2-server
Aug 2014 - Dec 2014
Free and open log management
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:164 commits in 4 months
Contributions summary:Oliver primarily focused on improving the performance of dashboard widgets by optimizing data requests, caching, and reducing the number of concurrent requests. They implemented changes to the frontend JavaScript code, specifically within the dashboard and search result count widgets. Additionally, the user contributed to the backend code by merging branch 'dashboard-optimize' which included modifications to the authentication process.
log-viewerloggingloggersecure-loggingsyslog
DJCordhose/react-showcase
Dec 2020 - Jun 2021
Contributions:116 commits, 1 PR, 88 pushes in 6 months
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