Damien Diederen
Founder at CrossTwine Labs
Munich, Bavaria, Germany
Summary
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RockstarDamien Diederen is a founder and veteran software engineer based in Munich with 18 years of experience building reliable back-end systems and tooling. As founder of CrossTwine Labs since 2008, he blends hands-on systems programming with entrepreneurial drive to deliver stable, production-grade infrastructure. He is an active open-source contributor with notable work on high-profile projects such as Mono (improving the MIPS runtime, exception handling and code generation) and Apache ZooKeeper (hardening the C client, adding SASL support and improving tooling and reliability). Damien’s expertise lies in low-level compiler/runtime optimizations, distributed systems reliability, and pragmatic bug-driven improvements that boost performance and maintainability. Colleagues would describe him as a pragmatic problem-solver who prefers subtle, high-impact engineering changes over flashy rewrites.
18 years of coding experience
Stackoverflow
2,474reputation
3.1mreached
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0questions
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Github Skills (34)
assembly10
runtimes10
distributed-systems10
c1110
sasl10
java10
c1710
javas10
dotnet-core10
compiler-optimization10
jit10
csharp10
mips10
api-design9
svn9
Programming languages (9)
Github contributions (5)
apache/zookeeper
Aug 2019 - Mar 2022
Apache ZooKeeper
Role in this project:
Back-end Developer
Back-end DeveloperContributions:210 reviews, 90 commits, 128 PRs in 2 years 6 months
Contributions summary:Damien primarily focused on improving the reliability and functionality of the Apache ZooKeeper C client. Their contributions include addressing issues in the `zkServer.sh` script, correcting chroot path handling in asynchronous callbacks, and fixing versioning issues within Perl and Python contribs. The user also implemented batch mode in `cli_mt` and contributed to SASL authentication support in the C client and the Perl binding. Furthermore, the user has implemented a mechanism to throttle host name resolutions.
zookeeperservice-discoverycloudnativeconfiguration-managementapache-zookeeper
mono/mono
Jan 2011 - Sep 2018
Mono open source ECMA CLI, C# and .NET implementation.
Role in this project:Back-end Developer
Back-end DeveloperContributions:42 commits, 6 PRs, 18 comments in 7 years 9 months
Contributions summary:Damien primarily contributed to the Mono runtime's MIPS backend, focusing on compiler optimizations, bug fixes, and performance improvements. Their work included implementing exception handling, refining code generation for specific scenarios like array indexing and function calls. They also addressed size calculation issues and refactored stack offset handling, enhancing the overall efficiency and stability of the MIPS implementation.
dotnetjitruntimemonoandroid
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