Ognjen Bostjančić
Senior Software Engineer (IV) at Sentry
Vienna, Austria
Summary
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Rockstar🎓
Top SchoolOgnjen Bostjančić is a Senior Software Engineer based in Vienna with four years of hands-on experience building full-stack systems, currently leading agent monitoring development at Sentry. He focuses on backend reliability and performance, contributing notable fixes and features to Sentry’s dynamic sampling and metrics APIs to improve data accuracy and transaction logging. Ognjen progressed rapidly through engineering roles at Sentry after prior stints at Toptal, Bitmovin, and Anyline, applying both freelance and product-driven perspectives. His academic foundation is a master's in computer science from the University of Sarajevo, and he brings a pragmatic attention to edge cases—surfacing and preventing IndexError and data type issues—that keeps large-scale observability systems robust in production.
5 years of coding experience
8 years of employment as a software developer
Master's degree Computer Science, Master's degree Computer Science at University of Sarajevo
Bosnian, English, German
Stackoverflow
26reputation
203reached
1answer
0questions
Github Skills (13)
performance-monitor10
api10
python10
metric10
apidoc9
data-structure9
data-structures9
rest-api8
api-rest8
restful-api8
api-design8
nodejs6
react6
Programming languages (6)
Github contributions (5)
getsentry/sentry
May 2023 - Jul 2026
Developer-first error tracking and performance monitoring
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1068 reviews, 1101 PRs, 2085 pushes in 3 years 2 months
Contributions summary:Ognjen primarily contributed to the dynamic sampling feature within the Sentry project, fixing bugs related to IndexError in transaction logs, adding data type checks, and enhancing the logging of transaction names. They were also involved in the development and testing of the metrics API, adding support for MRI (metric release health API) and creating functions for metric calculation. The user's work was focused on improving the accuracy and efficiency of data processing related to performance metrics.
performance-monitoringcrash-reportingcrash-reportserror-monitoringmonitoring
obostjancic/supercharger
Dec 2021 - Aug 2023
Contributions:57 PRs, 67 pushes, 1 branch in 1 year 7 months
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