Matthias Lienau
Director Solutions & Services at JustRelate Group
Hamburg, Germany
Summary
👤
Senior🎓
Top SchoolMatthias Lienau is a seasoned software leader and systems architect with 12+ years of hands-on experience building full-stack web and cloud-native applications from Hamburg. As Director Solutions & Services and former Head of Frontend Engineering at Quoori, he blends product-focused frontend leadership with deep backend expertise across JS/Node/React, Java, and LAMP/MEAN stacks. He has a strong track record in media and publishing systems, having driven editorial workflow and DAM/PIM projects at Gruner + Jahr and DER SPIEGEL. Matthias is also an active open-source contributor—his improvements to a high-performance CSV-to-JSON Node library demonstrate attention to robust parsing logic and test coverage. Comfortable bridging product, design, and engineering, he repeatedly moves teams from prototype to production-grade systems. His career roots in co-founding early web and music platforms give him an entrepreneurial mindset alongside pragmatic engineering.
12 years of coding experience
23 years of employment as a software developer
Informatik, Informatik at University of Hamburg
German, English
Stackoverflow
2,264reputation
1.3mreached
56answers
1question
Github Skills (13)
json-parser10
json10
jsonp10
nodejs10
javascript10
parsing10
testing9
csv8
pug6
svg6
php6
mongodb6
meteor6
Programming languages (6)
Github contributions (5)
Keyang/node-csvtojson
Nov 2015 - Nov 2015
Blazing fast and Comprehensive CSV Parser for Node.JS / Browser / Command Line.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:10 commits, 1 PR, 5 comments in 1 day
Contributions summary:Matthias primarily focused on enhancing the functionality of the CSV parsing library. They implemented a new option, `--flatKeys`, to prevent nested object creation, affecting the parsing of JSON-formatted data. Additionally, the user fixed a typo and added and improved tests related to the `--flatKeys` functionality. This involved modifications to core parsing logic and associated test cases to validate correct behavior.
command-linecsv-parserjscsvcsvtojson
atufkas/dsgvo
Apr 2018 - Apr 2018
Contributions:20 commits, 9 pushes in 3 days
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