Jean-frederic Clere
Principal Software Engineer at Red Hat
Neuchâtel, Neuchâtel, Switzerland
Summary
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Rockstar🎓
Top SchoolJean-frederic Clere is a Principal Software Engineer with 25 years of experience building and hardening core server software, currently driving platform work at IBM after a long tenure at Red Hat. He is a long-standing Apache committer who has made deep contributions to flagship projects including Apache HTTPD, Tomcat, APR and OpenSSL—work spanning AJP proxy behavior, HTTP/3 demo server integration, and cross-platform runtime fixes. Adept in both C and Java, he specializes in backend networking, connector and session management, and pragmatic interoperability fixes that keep large-scale web stacks reliable. His background includes systems-level development dating back to Sinix and BS2000 platforms, giving him uncommon depth across legacy hardware interfaces and modern cloud-native stacks like Kubernetes. Known for quietly resolving intricate protocol and build-system issues, he blends meticulous debugging with architectural improvements that benefit broad open-source ecosystems. Based in Neuchâtel, Switzerland, he pairs hands-on coding with long-term stewardship of critical internet infrastructure.
25 years of coding experience
21 years of employment as a software developer
ENSCPB
Stackoverflow
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Github Skills (30)
ssl10
tls1210
multiplatform10
back-end-development10
http10
proxy10
build-system10
proxy-server10
cross-platform10
apr10
c-programming10
c1110
tls1310
java10
tomcat10
Programming languages (18)
Github contributions (5)
apache/httpd
Aug 2004 - Nov 2022
Mirror of Apache HTTP Server. Issues: http://issues.apache.org
Role in this project:
Back-end Developer
Back-end DeveloperContributions:10 reviews, 227 commits, 14 PRs in 18 years 5 months
Contributions summary:Jean-frederic primarily worked on the Apache HTTP server's proxy module, focusing on the AJP (Apache JServ Protocol) connector. Their contributions involved debugging and improving the proxy's handling of AJP requests and responses. The user addressed issues related to chunked transfer encoding, timeout behavior, and correct processing of HTTP headers. They implemented features such as setting a connection timeout and ensuring proper session handling via session routes.
apacheapache-http-serverhttpd
apache/apr
Apr 2001 - Nov 2018
Mirror of Apache Portable Runtime
Role in this project:Back-end Developer
Back-end DeveloperContributions:36 commits, 2 PRs, 1 comment in 17 years 10 months
Contributions summary:Jean-frederic primarily contributed to the Apache Portable Runtime (APR) library by fixing errors and improving the codebase. They addressed issues such as missing definitions, incorrect type usage, and platform-specific adaptations for operating systems like Solaris and AS/400. The contributions include correcting build configurations and making conditional inclusions based on availability of features, enhancing cross-platform compatibility and code correctness. Further work included restructuring the build system with new options for modules, rpath, and runpath.
apache-portable-runtimeapr
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