Filip Roséen
Founder at Nisch Management
Stockholm, Stockholm County, Sweden
Summary
👤
Senior🎓
Top SchoolFilip Roséen is a Stockholm-based founder and senior software engineer with over a decade of experience building robust backend systems and performance-focused C++ core components. He has led engineering teams at Esportal and contributed significant bug fixes and demuxing improvements to the widely used VLC media player, demonstrating deep expertise in multimedia parsing and resilience against malformed data. A top 0.3% StackOverflow contributor (despite inactivity since 2015), Filip combines practical production experience with a long-standing habit of sharing knowledge via forums and occasional blog posts. His background spans low-level systems, networked services, and teaching advanced C++ at KTH, reflecting both hands-on coding and mentorship strengths. Equally comfortable running a one-person consultancy and collaborating in larger teams, he brings an engineer’s curiosity rooted in a childhood introduction to programming on a Commodore 64.
10 years of coding experience
7 years of employment as a software developer
High School Computer Science, High School Computer Science at NTI Gymnasiet
English, Swedish, French
Stackoverflow
63,181reputation
5.5mreached
579answers
11questions
alias
top-5%
floating-point
top-5%
regex
top-1%
curl
top-5%
if-statement
top-5%
java
top-5%
Github Skills (49)
json10
javascript10
c-language10
jquery10
mysql10
open-source10
c1110
regex10
apache10
c1710
php10
querystring10
multimedia10
cprogramming-language10
overwrite9
Programming languages (5)
Github contributions (5)
videolan/vlc
Jul 2018 - Apr 2022
VLC media player - All pull requests are ignored, please use MRs on https://code.videolan.org/videolan/vlc
Role in this project:
Back-end Developer
Back-end DeveloperContributions:31 commits in 3 years 10 months
Contributions summary:Filip primarily worked on fixing bugs and improving the performance of the VLC media player, specifically within the demuxing of Matroska (MKV) files. Their contributions included fixing issues related to the handling of infinite clusters, duration calculation, and ensuring proper element ordering, along with improvements to the parsing of MKV streams. The user also made a variety of fixes to various codec related issues, including patches to prevent crashes due to specific data structures and invalid data formats, as well as other enhancements within the overall demuxing logic.
gplv2libvlcfollowframeworkvlc
FilipRoseen-refp/first-react-app
Dec 2020 - Dec 2020
Contributions:3 pushes, 1 branch in 1 day
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