Tobias Stoeckmann
Contact Info
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Summary
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Rockstar🎓
Top SchoolTobias Stoeckmann is a seasoned software engineer with 11 years of experience specializing in security-hardening and scalable backend systems. He has led cross-functional teams as a Lead Security Architect and Software Architect, mentoring engineers, conducting code reviews, and running incident response for large e-commerce environments. Tobias is a prolific open-source contributor to widely used C projects (htop, curl, libarchive, libevent, tor, json-c, libmaxminddb and others), where his work focuses on fixing memory safety, integer overflow, and signal-race vulnerabilities. That blend of hands-on C expertise and architectural leadership means he routinely surfaces subtle, high-impact bugs that improve robustness across platforms. He holds an MEng in Industrial Informatics and brings a pragmatic, security-first mindset that reduces memory usage and hardens real-world systems. Colleagues describe him as a meticulous problem-solver who prefers eliminating classes of bugs rather than applying quick fixes.
11 years of coding experience
10 years of employment as a software developer
Master of Engineering - MEng, Industrial Informatics, Master of Engineering - MEng, Industrial Informatics at Hochschule Emden/Leer
Stackoverflow
144reputation
8kreached
6answers
0questions
Github Skills (73)
archiving10
c1110
file-format10
security10
c1710
e-mail10
file-parser10
gimp10
system-programming10
memory-management10
linux10
mailing10
vulnerabilities10
algorithm10
json10
Programming languages (7)
Github contributions (5)
shadow-maint/shadow
Jul 2015 - Nov 2021
Upstream shadow tree
Role in this project:
Back-end Developer & Security Engineer
Back-end Developer & Security EngineerContributions:58 reviews, 11 commits, 38 PRs in 6 years 5 months
Contributions summary:Tobias primarily focused on improving the security and stability of the shadow utility suite. Their contributions included fixing memory leaks, preventing buffer overflows, and addressing signal-handling race conditions within the `su`, `login`, `chage`, and `chfn` tools. Furthermore, the user corrected potential vulnerabilities related to PAM support and improved overall error handling in various tools. They also fixed typos and improved code comments within the repository.
upstreamshadow
derf/feh
Mar 2017 - Jul 2021
a fast and light image viewer
Role in this project:Software Engineer (focused on Security and Bug Fixing)
Software Engineer (focused on Security and Bug Fixing)Contributions:9 commits, 9 PRs in 4 years 4 months
Contributions summary:Tobias primarily focused on identifying and resolving security vulnerabilities and memory-related issues within the feh image viewer project. Their commits addressed potential buffer overflows, double-free conditions, out-of-bounds reads/writes, and memory leaks. They implemented solutions to enhance the program's stability and security, particularly when handling user inputs and file operations. The user's work also included improvements related to error handling and code robustness.
openexrimagex11lightimage-viewer
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