Matthias Seidel
Gründer at Transfermarkt
Hamburg, Germany
Summary
🤩
Rockstar🎓
Top SchoolMatthias Seidel is a founder and seasoned entrepreneur from Hamburg with nine years of formal software engineering experience and two decades of leadership building Transfermarkt since 2000. He blends hands-on engineering—contributing code cleanups and installer improvements to notable open-source projects like Apache OpenOffice—with strategic company leadership as former Geschäftsführer of Transfermarkt and SCOUTASTIC GmbH. Matthias combines marketing and business coaching training with practical product instincts, helping scale consumer-facing platforms and manage technical debt. Pragmatic and iterative in approach, his GitHub motto "First do it, then do it right, then do it better" reflects a bias for shipping, refining, and continuous improvement. Less obvious: he has worked on UI asset integrations for large desktop projects, showing comfort across back-end tooling and user-facing graphical elements. He brings entrepreneurial grit, operational experience, and a developer’s attention to detail to product-driven tech ventures.
9 years of coding experience
8 years of employment as a software developer
Business Coaching Kompakt (IHK), Business Coaching Kompakt (IHK) at BCA Business Coaching AkademieMarketing-Kommunikationswirt, Marketing-Kommunikationswirt at Hanseatische Akademie
German, English
Github Skills (11)
refactoring10
refactor10
code-optimization9
c-language8
software-distribution8
auto-release8
javas8
java8
buildr8
codebuild8
cprogramming-language8
Programming languages (13)
Github contributions (5)
apache/openoffice
Feb 2017 - Jan 2023
Apache OpenOffice
Role in this project:
Back-end Developer
Back-end DeveloperContributions:28 reviews, 2678 commits, 202 PRs in 6 years
Contributions summary:Matthias's contributions appear to focus on improving and refactoring resource files and cleaning up code by removing whitespace and fixing typos. The user also added a library and likely made adjustments to the Windows (MSI) installer. Furthermore, the user appears to have worked on code cleanup and improvements, particularly concerning the integration of a new set of graphical elements for the Start Center.
javaopenofficecplusplusapache
Pilot-Pirx/rapps-db
May 2022 - Mar 2025
Database for the ReactOS Application Manager (rapps)
Contributions:45 pushes, 3 branches in 2 years 10 months
application-managerreactosreactdatabasereactjs
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