René Meusel
Senior Software Development Engineer at Rohde & Schwarz Cybersecurity
Berlin, Germany
Summary
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Rockstar🎓
Top SchoolRené Meusel is a senior software engineer and applied cryptography specialist based in Berlin with 14 years of professional experience and a decade focused on secure, performant, maintainable systems. He combines hands-on C++ backend expertise with leadership experience—having led client teams and security engineering efforts that resulted in Common Criteria certification and contributions to nationally used privacy-preserving apps. At Rohde & Schwarz Cybersecurity and previously at neXenio and CERN, he shipped production-grade backend systems, optimized performance for large-scale file systems, and built robust CI/testing infrastructure. An active open-source contributor, René has improved widely used projects such as Microsoft's C++ REST SDK and the CernVM-FS server, often tackling subtle correctness and cross-platform build issues. He brings practical cryptographic implementation experience (including TLS 1.3 work and Kyber integration) and a knack for modernizing legacy codebases with safer concurrency and build practices. Known for mentoring engineers, he balances deep technical execution with making complex security features auditable and maintainable.
14 years of coding experience
6 years of employment as a software developer
Bachelor of Science (B.Sc.), IT Systems Engineering, 1.4, Bachelor of Science (B.Sc.), IT Systems Engineering, 1.4 at Hasso Plattner InstituteMaster of Science (M.Sc.), Software Engineering, Master of Science (M.Sc.), Software Engineering at Blekinge Institute of Technology
German, English, French
Stackoverflow
31reputation
5kreached
1answer
0questions
Github Skills (32)
cpp-library10
filesystem10
c-language10
catalog10
package-management10
multithreading10
conan10
patch10
windows10
http10
asynchronous-tasks10
recipe10
file-watcher10
management10
cprogramming-language10
Programming languages (9)
Github contributions (5)
cvmfs/cvmfs
Jul 2011 - Apr 2016
The CernVM File System
Role in this project:
Back-end Developer
Back-end DeveloperContributions:4116 commits, 745 PRs, 251 pushes in 4 years 10 months
Contributions summary:René focused on the CernVM File System, making significant changes to the core catalog traversal code. They addressed issues in depth-first traversal, fixed bugs related to catalog skipping, and introduced features like a simple hash filter for optimization. Their work includes refactoring, performance improvements, and adapting the code to use API changes, focusing on the core functionality of catalog management and file system traversal.
file-system
microsoft/cpprestsdk
Jan 2017 - Jul 2019
The C++ REST SDK is a Microsoft project for cloud-based client-server communication in native code using a modern asynchronous C++ API design. This project aims to help C++ developers connect to and interact with services.
Role in this project:Back-end Developer
Back-end DeveloperContributions:6 reviews, 5 commits, 6 PRs in 2 years 6 months
Contributions summary:René primarily focused on improving the robustness and functionality of the C++ REST SDK. Their contributions involved fixing bugs related to HTTP client behavior, particularly in handling host headers, connection reuse, and SSL proxy tunnels with basic authentication. They also addressed code quality by making `uri_builder` methods const and improving error reporting. Furthermore, the user contributed to file system operations and expanded the project's supporting documentation.
client-serverserver-client-communicationasyncmicrosoftcpp-library
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