Jan U
Senior Software Engineer at Hexagon Mining
Cologne, North Rhine-Westphalia, Germany
Summary
🤩
Rockstar🎓
Top SchoolJan U is a Senior Software Engineer based in Cologne with 13 years of experience building robust backend systems and storage-engine optimizations. He has a strong C++ background from roles at ArangoDB—where his contributions targeted core RocksDB engine performance and indexing—and a history of porting and modernizing codebases across platforms. Jan has progressed through technical leadership and hands-on senior engineering roles across industries including mining, fintech, and automotive software, demonstrating adaptability to domain-specific constraints. He combines deep systems knowledge with practical CI and tooling improvements, and is known for improving performance-critical internals rather than surface-level features.
13 years of coding experience
12 years of employment as a software developer
Master of Science (Diplom) Computer Science, Master of Science (Diplom) Computer Science at RWTH Aachen University
English, German
Stackoverflow
701reputation
24kreached
25answers
1question
Github Skills (14)
rocksdb10
c-language10
cprogramming-language10
database9
databases9
performance-optimization8
algorithm6
arangodb6
unordered-set6
api6
cookie6
apidoc6
decimal6
json5
Programming languages (20)
Github contributions (5)
arangodb/arangodb
Jan 2016 - Jun 2020
🥑 ArangoDB is a native multi-model database with flexible data models for documents, graphs, and key-values. Build high performance applications using a convenient SQL-like query language or JavaScript extensions.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:919 commits, 288 PRs, 2579 pushes in 4 years 5 months
Contributions summary:Jan's commits primarily involved modifying the core functionality of ArangoDB, focusing on internal operations and structure modifications. Specifically, the user addressed performance optimizations and addressed potential issues in the RocksDB engine, including improvements to indexing and data handling. This suggests a focus on back-end logic and storage engine interactions within the project.
data-modelsdatabase-modelextensionsjavascriptquery-language
ObiWahn/weechat-remote-notify
Jul 2012 - Aug 2014
Contributions:20 commits in 2 years 1 month
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