Stephan Beyer
Chief Financial Officer at headful
Berlin, Germany
Summary
🤩
Rockstar🎓
Top SchoolStephan Beyer is a CFO and serial entrepreneur with 18 years of experience at the intersection of finance, technology and product innovation, currently leading finance at Dryad Networks while co-founding headful. Trained as an engineer with a PhD in Finance, he brings technical fluency to strategic roles—having served as CEO/CFO of BigRep and as an investor and board member across deep-tech and sustainability ventures. He pairs hands-on engineering contributions (notably to projects like backward-cpp, Nextcloud Desktop and core Git) with senior leadership, improving code robustness and reliability in widely used open-source projects. His work focuses on scaling mission-driven businesses that combine hardware, edge computing and AI to deliver real-world impact, particularly in environmental protection and additive manufacturing. Pragmatic and curious, Stephan balances high-level capital strategy with technical code fixes and memory leak hunts that many executives never touch. Based in Berlin, he is comfortable switching from investor decks to compiler warnings, making him a rare CFO who speaks both finance and systems.
18 years of coding experience
17 years of employment as a software developer
Ph.D Finance, Ph.D Finance at Technische Universität BerlinMaster Management, Master Management at Solvay Brussels School of Economics and Management
Github Skills (19)
debugging10
git10
debug10
c-language10
memory-management10
cmake10
c1110
c1710
stacktrace10
version-control10
shell10
cprogramming-language10
nextcloud10
testing9
qt9
Programming languages (17)
Github contributions (5)
git/git
Apr 2008 - Nov 2017
Git Source Code Mirror - This is a publish-only repository but pull requests can be turned into patches to the mailing list via GitGitGadget (https://gitgitgadget.github.io/). Please follow Documentation/SubmittingPatches procedure for any of your improvements.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:62 commits in 9 years 8 months
Contributions summary:Stephan primarily contributed to the Git source code, focusing on improving the reliability and safety of core functionalities. Their commits addressed issues related to the "am" and "sequencer" commands, specifically making the abort processes safer by incorporating checks and warnings. The user also made changes to the bisect functionality, adding error handling to prevent misuse and ensure correct operation. These changes suggest a focus on bug fixes, improved error handling, and overall stability of the Git tool.
hacklanggit-clientmercurialfollowlibgit2
nextcloud/desktop
May 2020 - Jul 2020
💻 Desktop sync client for Nextcloud
Role in this project:Back-end Developer
Back-end DeveloperContributions:3 reviews, 64 commits, 18 PRs in 1 month
Contributions summary:Stephan primarily focused on improving the Nextcloud desktop client's codebase. They made significant contributions to refactoring and improving the client's code, addressing memory leaks, and optimizing the system's handling of resources. The user's work included the implementation of more fine-grained sanitizer options to enhance code quality and reliability. Furthermore, they addressed potential crashes and inefficiencies within the application's GUI elements.
cppnextcloudsyncc-plus-plusdesktop
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.