Sebastian Freundt
Data Manager
Berlin, Germany
Summary
👤
Senior🎓
Top SchoolSebastian Freundt is an experienced software architect and data manager with 21 years in financial services engineering, currently leading data efforts at GA Financial Solutions in Berlin. He combines strong analytical foundations from a diploma in mathematics and computer science with hands-on skills in R, C and RDF/SPARQL to build robust, auditable data systems. His open-source contributions include implementing WARC support in the widely used libarchive library—adding reader/writer functionality and tests to enable ISO 28500:2009-compliant web archiving. Known for bridging research-grade architecture (from his TU Berlin background) with production reliability, he is comfortable navigating both low-level implementation details and enterprise data governance.
21 years of coding experience
14 years of employment as a software developer
diploma, maths, cs, diploma, maths, cs at Technische Universität Berlin
English
Github Skills (12)
c1710
filetype10
c1110
archiving10
libarchive10
file-format10
7zip7
gz7
zip7
bz27
xz7
tar7
Programming languages (12)
Github contributions (5)
libarchive/libarchive
May 2014 - Aug 2014
Multi-format archive and compression library
Role in this project:
Back-end Developer
Back-end DeveloperContributions:23 commits in 2 months
Contributions summary:Sebastian primarily contributed to the implementation of WARC (Web ARChive) format support within the libarchive library. Their work involved developing both reader and writer functionalities for WARC, including header parsing, data handling, and time-based metadata storage. The user also added tests to validate the new WARC features and ensure proper handling of different file types. This development enabled the library to create and interpret web archives conforming to the ISO 28500:2009 standard.
multi-formatrarbz2backupposix
hroptatyr/ttt
Jul 2016 - May 2018
Contributions:1 release, 114 pushes, 1 branch in 1 year 10 months
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