Tomasz Posłuszny
Software Developer at DevPeer
Warsaw, Masovian Voivodeship, Poland
Summary
👤
Senior🎓
Top SchoolTomasz Posłuszny is a seasoned software developer with 13 years of experience building high-performance backend systems and full-stack applications across finance, browser R&D, and embedded platforms. He has driven measurable impact—e.g., redesigning a market-data auditing service at Goldman Sachs to boost throughput by over 500%—and led browser feature development on Chromium-based products for multiple OSes. An active contributor to the widely used RocksDB project, he expanded RocksJava’s API, added event listeners, and strengthened resource management, reflecting deep systems and JVM expertise. Based in Warsaw, he blends academic training in mechatronics and robotics with hands-on engineering, making him adept at turning complex requirements into reliable, production-ready solutions.
13 years of coding experience
11 years of employment as a software developer
Master of Engineering (M.Eng.), Mechatronics, Robotics, and Automation Engineering, Master of Engineering (M.Eng.), Mechatronics, Robotics, and Automation Engineering at Warsaw University of Technology
English, German
Github Skills (9)
rocksdb10
javas10
api10
apidoc10
java10
database9
storage-engine9
unit-testing9
databases9
Programming languages (9)
Github contributions (5)
facebook/rocksdb
Sep 2020 - Oct 2020
A library that provides an embeddable, persistent key-value store for fast storage.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:6 commits, 7 PRs, 3 comments in 1 month
Contributions summary:Tomasz primarily contributed to the Java API for the `ConcurrentTaskLimiter` class, including implementation and associated unit tests. They also implemented missing Java APIs for `ColumnFamilyOptions` and `DBOptions` fields, such as `cf_paths`, `OldDefaults`, `OptimizeForSmallDb`, and boolean/numerical fields, expanding the functionality of the RocksJava API. Further, the user added event listeners functionality to RocksJava, enabling more in-depth monitoring and customization of the database. Additionally, they made the RocksDB instance responsible for closing associated `ColumnFamilyHandle` instances.
persistent-storagebigtablefast-storagelsm-treedatabase
alucarded/brave-core
Feb 2022 - Oct 2024
Core engine for the Brave browser for Android, Linux, macOS, Windows. For issues https://github.com/brave/brave-browser/issues
Contributions:12 pushes, 2 branches in 2 years 9 months
browserwindowsbrave-browserlinuxandroid
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