Sebastian Janzen
Senior Consultant at innoQ
Odenthal, North Rhine-Westphalia, Germany
Summary
👤
Senior🎓
Top SchoolSebastian Janzen is a Senior Consultant with 13 years of hands-on experience in Java-based web technologies, Spring, Hibernate and full-stack web development, currently advising and delivering at innoQ. He combines systems-level skills—Linux server administration, OpenLDAP, DNS and Docker—with practical cloud experience on AWS and IoT/home-automation work through contributions to Eclipse SmartHome and openHAB. His background includes optimizing Classic UI webapps and refactoring backend handlers, showing a knack for pragmatic fixes that improve performance and maintainability. A Diplomand in Informatics from Cologne University of Applied Sciences, he brings both academic depth and long-term operational experience dating back to early IT support roles. Notably, his open-source contributions reveal a preference for durable, back-end improvements and subtle UX optimizations rather than flashy rewrites.
13 years of coding experience
Diplom, Information Technology, ITA, Datenbanken, C-Programmierung, Elektro- und Prozessleittechnik, Diplom, Information Technology, ITA, Datenbanken, C-Programmierung, Elektro- und Prozessleittechnik at Cologne University of Applied Sciences
English
Stackoverflow
2,174reputation
339kreached
14answers
7questions
Github Skills (25)
javascript10
openhab10
ui-design10
java10
javas10
uid10
front-end-development10
html10
smart-device10
rest-api10
smart-tv10
smart-automation10
api-design9
restful-api9
api-rest9
Programming languages (18)
Github contributions (5)
eclipse-archived/smarthome
Mar 2015 - Jan 2017
Eclipse SmartHome™ project
Role in this project:
Back-end Developer
Back-end DeveloperContributions:12 commits, 20 PRs, 65 comments in 1 year 10 months
Contributions summary:Sebastian primarily contributed to the Eclipse SmartHome project by implementing and modifying backend functionalities. Their work included adding a configuration property to disable the HTML cache in the classic UI, fixing an issue with the `getItemsByTag()` method, and introducing a polling interval configuration for the Hue bridge. Furthermore, the user refactored code within the HueBridgeHandler, including adding a method to notify listeners, and fixing an issue in the isEqual method.
ioteclipsesmarthome
openhab/openhab1-addons
Feb 2015 - Jan 2016
Add-ons for openHAB 1.x
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:18 commits, 12 PRs, 63 comments in 11 months
Contributions summary:Sebastian primarily focused on improving the Classic UI for openHAB 1.x, addressing bugs, and enhancing functionality. Their contributions included fixing UI elements, optimizing HTML structure and JavaScript code. The user introduced features such as a system property to disable HTML cache and improved user experience through more efficient code. They also refactored and optimized existing code within the webapp for improved performance.
add-onsopenhabaddononsinternet-of-things
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