Jan-piet Mens
The Man at JP's People
Germany
Summary
🤩
RockstarJan-piet Mens is a seasoned systems architect and technical consultant based in Germany with over three decades of hands-on IT experience and 11 years of focused engineering practice. He blends deep Unix/Linux, DNS/DNSSEC, LDAP and SMTP expertise with practical C development and Red Hat tooling, delivering robust open-source integrations for enterprise environments. As author and trainer he bridges documentation, tooling, and developer experience—evident from technical writing contributions to PowerDNS and Ansible that improve clarity for operators. His open-source work spans reliable back-end engineering on projects like mosquitto-auth-plug, mqttwarn and OwnTracks recorder, and tooling improvements to the widely used jo utility that make shell JSON handling safer and more portable. Known for pragmatic problem-solving, he combines long-term consulting at JP's People with a knack for subtle interoperability fixes (UTF-8, encoding, memory leaks) that quietly raise system reliability.
11 years of coding experience
Dutch, German, Spanish, French, English
Stackoverflow
469reputation
50kreached
13answers
0questions
mqtt
top-5%
Github Skills (58)
json10
authorisation10
apim10
servicebus10
python10
api-design10
mysql10
scripting10
technical-writing10
dns-resolver10
enterprise-integration10
mqtt10
powerdns10
http10
user-authentication10
Programming languages (26)
Github contributions (5)
jpmens/jo
Oct 2017 - Nov 2022
JSON output from a shell
Role in this project:
Back-end Developer
Back-end DeveloperContributions:17 releases, 1 review, 82 commits in 5 years 1 month
Contributions summary:Jan-piet primarily contributed to the `jo` project by adding features and fixing bugs. They implemented the `-e` option, added filter functionality, and fixed several issues related to string coercion and file handling. The user also made enhancements, such as correcting usage information, adding tests, and fixing Windows-related compilation issues.
a-shelljson-outputshelljson
owntracks/recorder
Jul 2017 - Jan 2023
Store and access data published by OwnTracks apps
Role in this project:Back-end Developer
Back-end DeveloperContributions:11 releases, 3 reviews, 159 commits in 5 years 6 months
Contributions summary:Jan-piet primarily contributed to the back-end functionality of the OwnTracks recorder. Their work included refactoring code to consistently use `json_delete`, adding support for OwnTracks Pico, and adjusting the code for libsodium. Furthermore, the user implemented features related to handling reverse geocoding, including supporting OpenCage and revgeod. These changes enhanced the functionality and maintainability of the recorder application.
websocketsdatadata-accessmqttowntracks
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