Thomas Jansen
Gründer Und Geschäftsführer at Crissy Field GmbH
Hamburg, Germany
Summary
👤
Senior🎓
Top SchoolThomas Jansen is a seasoned founder and engineering leader based in Hamburg with over 15 years of practical industry experience and a PhD in Computer Science focused on computer graphics and GPGPU. He founded and runs Crissy Field GmbH, helping teams turn ideas into secure, production-grade software, and has repeatedly stepped into hands-on leadership roles such as Fractional CTO and VP of Engineering to deliver time-critical MVPs. His decade in Silicon Valley includes senior engineering management at Apple, where he led real-time networking work for FaceTime, AirPlay and related technologies, blending low-level systems expertise with product-driven execution. Thomas combines deep academic rigor—having implemented real-time GPU computation for medical visualization—with startup grit, advising early-stage ventures and serving on boards. He is particularly effective as a mentor and sparring partner for CTOs and VPs of Engineering, translating high-level strategy into concrete engineering practices. An understated strength is his ability to move between research-grade prototypes and scalable production systems, ensuring technical vision aligns with business outcomes.
15 years of coding experience
22 years of employment as a software developer
Dr. rer. nat., Computer Graphics, GPGPU, Medicine, Dr. rer. nat., Computer Graphics, GPGPU, Medicine at Technical University of MunichDipl. Inf., Software Development, Computer Graphics, Dipl. Inf., Software Development, Computer Graphics at The University of Bonn
German, English
Stackoverflow
2,233reputation
462kreached
29answers
4questions
Github Skills (68)
webarchive9
warc9
command-line-tool9
ffmpeg9
slug8
hue8
dns-record8
rack8
multithreading8
security8
ruby8
chrome-ux-report8
aws8
ingress8
server8
Programming languages (7)
Github contributions (5)
tja/aykroyd
Nov 2018 - Jun 2021
Contributions:3 releases, 78 commits, 38 pushes in 2 years 6 months
crissyfield/troll-a
Dec 2023 - Feb 2025
Drill into WARC web archives
Contributions:4 releases, 2 PRs, 68 pushes in 1 year 2 months
warcwebarchivecommand-line-toolcommon-crawlinternet-archive
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.