Simon Hellmayr
Senior Software Engineer at Sentry (sentry.io)
Vienna, Austria
Summary
🤩
Rockstar🎓
Top SchoolSimon Hellmayr is a senior software engineer based in Vienna with 11 years of professional experience and a background in telecommunications and electrical engineering from TU Wien. Currently at Sentry, he focuses on backend systems and metrics, contributing to the widely used open-source error tracking platform by improving instrumentation, Metrics API filtering, and handling of edge cases like unknown project slugs. He began coding in 2003 as a hobbyist and has carried that long-term curiosity into pragmatic engineering that closes gaps between monitoring data and usable insights. Comfortable working on distributed data and performance-sensitive features, he brings both academic rigor and hands-on production experience to observability and backend tooling. An understated strength is his attention to data correctness in telemetry pipelines, which helps teams make reliable decisions from noisy systems.
11 years of coding experience
Vienna University of Technology
English, French, German
Github Skills (6)
api10
back-end-development10
python10
django10
data-management9
postgresql8
Programming languages (7)
Github contributions (5)
getsentry/sentry
Apr 2024 - Apr 2025
Developer-first error tracking and performance monitoring
Role in this project:
Back-end Developer
Back-end DeveloperContributions:403 reviews, 281 PRs, 435 pushes in 1 year
Contributions summary:Simon primarily worked on back-end features related to metrics, specifically adding instrumentation and functionality to track and manage metrics-related operations. They added metrics tracking for blocking and unblocking operations in the DDM (Dynamic Data Management) system. Furthermore, they enabled the use of project slugs in the Metrics API for filtering and grouping, significantly contributing to data querying capabilities. The user also addressed issues in the Metrics API by fixing inconsistencies in the returned data and improving the handling of unknown project slugs.
monitorpythonsentrydjangoerror-monitoring
shellmayr/shellmayr.github.io
Jan 2016 - Aug 2017
Contributions:38 pushes, 1 branch in 1 year 7 months
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