Ulrich Telle
Pensioner, Open Source Developer, Consulting As Freelancer
Cologne, North Rhine-Westphalia, Germany
Summary
🤩
Rockstar🎓
Top SchoolUlrich Telle is a seasoned software developer and consultant with 18 years of experience and a long career at Bayer before transitioning to freelance open-source work and scientific software consulting. He pairs deep mathematical and computer science training (M.Sc. degrees) with hands-on C++ systems and backend expertise, contributing notable fixes and feature support to widely used projects like wxWidgets and the wxSQLite3 wrapper, including SQLCipher 4 support and ChaCha20-related fixes. As a pensioner-turned-freelancer based in Cologne, he focuses on technical and scientific data analysis software while continuing to improve cross-platform GUI and database tooling. His background as an instructor and project manager informs a pragmatic, quality-driven approach to code and collaboration that balances legacy system care with modern encryption and internationalization improvements.
18 years of coding experience
42 years of employment as a software developer
M.Sc. Mathematics, M.Sc. Mathematics at FernUniversität in HagenMathematical-Technical Assistant, Mathematical-Technical Assistant at Bayer AG, LeverkusenGeneral qualification for university entrance, General qualification for university entrance at Hölderlin-Gymnasium, Köln
German, English, finnisch, French
Stackoverflow
301reputation
28kreached
9answers
0questions
wxwidgets
top-5%
Github Skills (22)
c-language10
internationalization10
cross-platform10
c1110
c1710
wxwidgets10
localization10
cplus10
cpp10
windows-gui10
cprogramming-language10
windows8
linux7
macos7
sqlcipher6
Programming languages (7)
Github contributions (5)
utelle/wxsqlite3
Mar 2008 - Nov 2022
wxSQLite3 - SQLite3 database wrapper for wxWidgets (including SQLite3 encryption extension)
Role in this project:
Back-end Developer
Back-end DeveloperContributions:75 releases, 458 commits, 17 PRs in 14 years 10 months
Contributions summary:Ulrich's commits primarily involve modifications to the SQLite3 encryption extension. They focused on fixing buffer underflow issues in the MD5Final function and resolving code-related problems for cipher modes, particularly with the ChaCha20 algorithm. Furthermore, the user has implemented support for the new SQLCipher 4 database format and improved the methods that manage database attachments and rekeying functionality.
wxwidgetssqlite3-databasesqlite3-encryptionsqlite3sqlite
wxWidgets/wxWidgets
Aug 2018 - Aug 2022
Cross-Platform C++ GUI Library
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:60 reviews, 27 commits, 27 PRs in 4 years
Contributions summary:Ulrich primarily focused on enhancing the cross-platform C++ GUI library wxWidgets. Their contributions included fixing issues related to the MDI window menu labels, changing the storage of translations, and addressing build directory handling for various operating systems. The user also updated the language database and refactored wxLocale and wxUILocale to improve i18n support, including adding functionality to retrieve localized names.
x11c-plus-plussdlwin32gui-framework
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