Jacques-henri Jourdan
Membre De L'association
Paris, Ile-de-France
Summary
🤩
Rockstar🎓
Top SchoolJacques-henri Jourdan is a research-oriented software engineer with 13 years of experience combining formal methods, compiler internals and runtime systems work from Paris. He has a strong academic foundation (ENS, Paris VII doctorate) and a research track record including a postdoc at MPI‑SWS and roles at INRIA and LMF, where he applies formal verification to real systems. His open-source contributions span high-profile projects—improving the OCaml runtime, hardening the CompCert verified C compiler, and adding proofs and invariants in the Creusot verification tool—showing a rare blend of low-level C runtime expertise and automated proof engineering. Comfortable across compilers, memory management and deductive verification, he focuses on making correctness and performance coexist in production-grade language tooling. An enduring member of France-IOI since 2006, he also brings long-term mentoring and community engagement to technical projects.
13 years of coding experience
M2, Informatique, M2, Informatique at Ecole normale supérieureThèse, Informatique, Thèse, Informatique at Université Denis Diderot (Paris VII) / University Paris VII
French, English, Russian
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (27)
algorithms10
formal-methods10
runtimes10
memory-management10
run-time10
proof10
c1110
data-structure10
ocaml10
c1710
compiler-compiler10
formal-verification10
coq10
sys10
data-structures10
Programming languages (14)
Github contributions (5)
creusot-rs/creusot
Oct 2021 - Oct 2022
Creusot helps you prove your code is correct in an automated fashion.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:188 reviews, 159 commits, 275 PRs in 1 year
Contributions summary:Jacques-henri primarily contributed to formal verification and deductive reasoning aspects of the project. They fixed specifications for vector operations, addressed invariants in sorting algorithms, and implemented a knapsack problem test, demonstrating a focus on proving code correctness using formal methods. Furthermore, they made changes to the red-black tree implementation and added tests, revealing their expertise in data structures and algorithms. These contributions are well-aligned with the project's goal of automated code verification.
why3rustsemideductive-reasoningformal-verification
AbsInt/CompCert
Oct 2014 - Oct 2021
The CompCert formally-verified C compiler
Role in this project:Back-end Developer
Back-end DeveloperContributions:21 commits, 13 PRs, 43 comments in 7 years 1 month
Contributions summary:Jacques-henri contributed significantly to the CompCert formally-verified C compiler. Their work included upgrading dependencies, specifically the `flocq` library, and fixing potential integer overflows in the printing functions for both the Clight and Csyntax frontends. Furthermore, the user addressed several bugs in the pre-parser, resolving parsing issues and enhancing its robustness. These commits demonstrate a focus on compiler internals, language parsing, and dependency management.
verifiedcompcertformally-verifiedcompilercoq
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.