Jan Hoffmann
Software Developer at Markant Gruppe
Gengenbach, Baden-Württemberg, Germany
Summary
🤩
RockstarJan Hoffmann is a pragmatic software developer based in Gengenbach, Germany, with a decade of experience building embedded, backend, and full‑stack systems. He contributes actively to OpenWrt—adding device support, improving DSL and Realtek drivers, and enhancing the LuCI web interface—demonstrating deep familiarity with Linux-based router platforms and low-level hardware integration. On the backend he maintains and hardens libraries like the Go port of libphonenumber, fixing critical nil-pointer bugs and expanding test coverage to improve reliability. At Markant Gruppe he applies this blend of system-level and application-level skills to deliver robust, permission-aware UI features and dependable daemon behavior. Colleagues rely on him for pragmatic debugging, performance tuning, and bridging the gap between device trees, kernel drivers, and user-facing configuration tools. An understated strength is his knack for turning nuanced hardware limitations into maintainable software fixes that survive production use.
10 years of coding experience
Github Skills (49)
unit-testing10
debug10
ips10
javascript10
lib10
luci10
routers10
hardware-interface10
testing10
ram10
router10
linux10
c-programming10
c1110
dsa10
Programming languages (7)
Github contributions (5)
openwrt/openwrt
Jul 2021 - Mar 2025
This repository is a mirror of https://git.openwrt.org/openwrt/openwrt.git It is for reference only and is not active for check-ins. We will continue to accept Pull Requests here. They will be merged via staging trees then into openwrt.git.
Role in this project:
Embedded Systems Engineer / IoT Developer
Embedded Systems Engineer / IoT DeveloperContributions:11 reviews, 2 PRs, 73 comments in 3 years 8 months
Contributions summary:Jan primarily contributed to the OpenWrt project, a Linux distribution commonly used in embedded systems. Their work centered on adding support for various NETGEAR and HPE devices, specifically the WAC124, WNDR3700v5, and HPE 1920 series switches. They implemented new device definitions, wrote DTS files for hardware support, and fixed bugs in the RTL83xx switch driver, especially related to realtek's PHY and SFP support, and improved features in the DSL drivers. Additionally, the user contributed by adding debugging and performance enhancements to the realtek's dsa drivers by implementing a debugfs L2 table node, and improving the overall performance and logging. They also contributed improvements to the Lantiq DSL driver.
mergedopenwrtinspull-requestsstaging
openwrt/packages
Jan 2020 - Oct 2022
Community maintained packages for OpenWrt. Documentation for submitting pull requests is in CONTRIBUTING.md
Role in this project:Back-end Developer
Back-end DeveloperContributions:2 reviews, 17 commits, 16 PRs in 2 years 10 months
Contributions summary:Jan primarily contributed to the vnstat2 package within the OpenWrt repository. Their work focused on adding the package, fixing issues related to interface monitoring, and updating the package to newer versions. These commits involved modifying the vnstat2 daemon, including adding new functionalities such as a noexit option, and patching existing code to ensure correct behavior. This work demonstrates a focus on backend logic and system-level configuration within the OpenWrt environment.
pull-requestsopenwrtstudio
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