Johannes Kauffmann - Embedded Software Engineer at Manter International BV

Johannes Kauffmann

Embedded Software Engineer at Manter International BV

Emmen, Drenthe, Netherlands

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Summary

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Senior

🎓

Top School

Johannes Kauffmann is an Embedded Software Engineer based in Emmen, Netherlands, with a decade of hands-on experience in low-level C++ and embedded systems. He blends academic training in Technical Computer Science with practical work at Manter International, where he progressed from intern to engineer tackling real-world embedded hardware and software projects. An active open-source contributor, Johannes has improved code quality and cross-platform build stability in prominent projects like Qt Base and VLC, demonstrating a keen eye for modernization and compiler compatibility. He is especially skilled at eliminating warnings, porting types for safer builds, and fixing platform-specific linking and build issues—small changes that materially improve long-term maintainability. Colleagues rely on his attention to detail and disciplined refactoring approach to keep complex systems robust and portable across compilers and OSes. Outside of core duties he quietly strengthens projects by removing deprecated patterns and improving code readability, a sign of his commitment to sustainable engineering.

9 years of coding experience

Bachelor's degree, Technische informatica / Computertechniek / Technische computerkunde, Bachelor's degree, Technische informatica / Computertechniek / Technische computerkunde at NHL Stenden Hogeschool

VWO, VWO at Hondsrug College

Github Skills (31)

debugging10

debug10

c-language10

qt10

build-system10

cmake10

c1110

software-quality10

gcc10

c1710

maintainability10

vlc10

compiler-optimization10

multimedia10

clangd10

Programming languages (12)

C#QMLC++ShellCCMakeJavaScriptPerl

Github contributions (5)

videolan/vlc

Aug 2021 - Jan 2023

VLC media player - All pull requests are ignored, please use MRs on https://code.videolan.org/videolan/vlc

Role in this project:

Back-end Developer

Contributions:133 commits in 1 year 4 months

Contributions summary:Johannes primarily contributed to the audio output module of the VLC media player. Their work involved reporting and handling initial volume and mute status in the winstore audio output module. They also addressed linking issues with x86 DLLs on UWP, and fixed build errors related to including the correct headers. Furthermore, the user corrected format specifiers for size_t.

gplv2libvlcfollowframeworkvlc

qt/qtbase

Sep 2022 - Dec 2022

Qt Base (Core, Gui, Widgets, Network, ...)

Role in this project:

Back-end Developer

Contributions:18 commits in 3 months

Contributions summary:Johannes primarily contributed to the Qt Base library by addressing code quality issues and fixing bugs. They focused on improving code maintainability by using `nullptr` and removing unused code elements, specifically within the `qibusplatforminputcontext.cpp`, `qminimaleglscreen.cpp`, `qlinuxfbscreen.cpp`, `qsql_sqlite.cpp` and other files. The commits also show a focus on modernizing the code by replacing legacy practices with more current practices. Further contributions involved porting code to `qsizetype` to address compiler warnings, implying a deep understanding of Qt's internal mechanisms.

qt4c-plus-plusqt5guiwidgets

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