About Ivan
As a DWH BI Developer at Sberbank, I have contributed to optimizing storage and performance by integrating LZ4 compression into the company's custom Greenplum fork and enhancing cluster stability through resolving critical defects in extensions. Additionally, I developed comprehensive testing suites and ported the diskquota extension to Greenplum 7 to improve distributed storage management.
I am currently pursuing a Master of Science in Computer Science at the University of Bonn and hold an ongoing Bachelor's degree from Moscow Aviation Institute. With skills in testing, API, and GitHub/GitLab/Bitbucket, I aim to continue contributing to backend and distributed systems development while enhancing my expertise in modern technologies.
Russian
Native or bilingual
English
Fluent
German
Basic
Can work on-site
Bonn (up to 50km)
Experience
- SBERBANK (DISTRIBUTED LARGE DB SYSTEMS)C/C++ DeveloperDIGITAL AND ITApril 2025 - October 2025 (6 months)Moscow, Russia• Migrated Database backup/ingest to LZ4: smaller size with faster speed, runtime reduced by 7% with 20 TB run.• Increased test coverage (unit + regression) and automated checks inJenkins• Updated Greenplum resource groups to fit the customer's rules and added tests; known bugs dropped by 40%.• Resolved critical PostGIS/pgAudit defects (crashes & edge cases) during a limited amount of time; developed in a short time a time-critical client fix that reduced incident volume by 30% post-patch.• Ported the diskquota (a DB extension) to Cloudberry for 50+ node clusters; this let us release a client info product 4 weeks before the deadline.
- IVA TECHNOLOGIES (VIDEO/REAL-TIME SYSTEMS)C++ DeveloperDIGITAL AND ITJanuary 2024 - April 2025 (1 year and 3 months)Moscow, Russia• Implemented real-time features with WebRTC and resolved complex multithreading issues that improved call-session stability.• Added pytest tests and release checks, so we catch bugs earlier and releases became more stable• Built an end-to-end auto-build for our internal Linux fork and hooked it into GitLab CI/CD, speeding up mobile app releases.• Built the company's first reusable timer widget from scratch in a large codebase; fixed memory leaks and refactored code deeply.• Ported corporate repository to the latest Linux kernel release and delivered a reproducible automated release building; clean build now completes in ~30 minutes (down from ~2 hours), and new-dev onboarding now takes 1 hour.
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Education
- Master of ScienceUNIVERSITY OF BONN2025Master of Science
- Bachelor of Computer ScienceMOSCOW AVIATION INSTITUTE2025Bachelor of Computer Science