Sebastian Streich
Staff Security Software Engineer at Mozilla
Berlin, Germany
Summary
🤩
Rockstar🎓
Top SchoolSebastian Streich is a Staff Security Software Engineer in Berlin with 11 years of experience building privacy- and security-focused products for Mozilla, most recently leading work on Firefox VPN. He progressed from a DOM Security working student to senior and now staff roles, combining hands-on engineering with product-first security for consumer VPN services. Comfortable across web and systems-level security, he brings practical expertise in securing browser-adjacent networking features and shipping reliable privacy tooling at scale. Sebastian studied computer science at FH Flensburg and Humboldt-Universität zu Berlin, blending formal CS training with real-world product delivery. Colleagues describe him as a pragmatic problem-solver who translates complex security requirements into auditable implementation and operational practices. Outside formal bios, his GitHub playfully signals a light-hearted developer persona behind disciplined security work.
11 years of coding experience
5 years of employment as a software developer
Informatik, Informatik at Humboldt-Universität zu BerlinBachelor of Science - BS, Informatik, Bachelor of Science - BS, Informatik at FH Flensburg
Github Skills (69)
testing10
firefox-addon10
security10
web-development10
thunderbird10
web-platform10
javascript10
vpn10
vpn-client10
safari10
browser10
webkit10
microsoft-edge10
firefox10
html10
Programming languages (8)
Github contributions (5)
strseb/multi-account-containers
Apr 2022 - Oct 2023
Firefox Multi-Account Containers lets you keep parts of your online life separated into color-coded tabs that preserve your privacy. Cookies are separated by container, allowing you to use the web with multiple identities or accounts simultaneously.
Contributions:1 push, 1 branch in 1 year 6 months
identitiestabsfirefoxkeepfirefox-extension
strseb/vpn-buildcontainer-android
Nov 2021 - Feb 2023
Contributions:18 pushes, 1 branch in 1 year 3 months
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