Etienne Petrel
Lead Engineer, Storage Engines at MongoDB
Greater Sydney Area Australia
Summary
🤩
Rockstar🎓
Top SchoolEtienne Petrel is a Lead Engineer specializing in storage engines and low-level C/C++ systems, currently leading storage engine development at MongoDB from Sydney. With a background in aerospace-grade software at Thales and strong embedded systems experience, he brings rigorous engineering practices, MISRA-level discipline, and CI/CD improvements to database internals. His open-source work includes substantive contributions to WiredTiger and MongoDB core—adding test automation, integrating workload generators, and optimizing integration with Apache Arrow—demonstrating deep expertise in storage data structures and performance tuning. Comfortable across back-end, test automation, and build systems, he combines systems-level craftsmanship with a history of cross-language projects (C, C++, Python) and safety-critical development. Known for improving test coverage and developer tooling, he pairs hands-on coding with pragmatic leadership to make complex storage features reliable and maintainable.
5 years of coding experience
8 years of employment as a software developer
Specialized Master Localization and Multi-Sensor Systems Engineering Signal and image processing data management and electromagnetic compatibility, Specialized Master Localization and Multi-Sensor Systems Engineering Signal and image processing data management and electromagnetic compatibility at ENSTAEngineer's degree Electronics Energy and Embedded Systems, Engineer's degree Electronics Energy and Embedded Systems at Polytech Paris-SaclayUniversity College London
French, English, Spanish
Stackoverflow
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Github Skills (18)
c-language10
python10
wiredtiger10
databases10
database-testing10
low-level-programming10
cprogramming-language10
database10
test-automation10
data-structure9
algorithm9
algorithms9
document-generation9
documentation9
documents9
Programming languages (5)
Github contributions (5)
wiredtiger/wiredtiger
Jan 2021 - Jan 2023
WiredTiger's source tree
Role in this project:
Back-end Developer & Test Automation Engineer
Back-end Developer & Test Automation EngineerContributions:3871 reviews, 285 commits, 1190 PRs in 2 years
Contributions summary:Etienne contributed to the WiredTiger source tree by adding test tags to several test programs, enabling auto-generation of test coverage documentation. This involved modifying Python scripts to parse and generate documentation based on the existing test tags. The user also modified several C++ files for build system and related features. Furthermore, they updated C++ code to integrate a workload generator and perform testing of the database.
rustwiredtiger
mongodb/mongo
Jul 2021 - Jan 2023
The MongoDB Database
Role in this project:Back-end Developer
Back-end DeveloperContributions:358 commits, 1 push in 1 year 6 months
Contributions summary:Etienne's contributions primarily focused on integrating WiredTiger with MongoDB, particularly concerning its integration with Apache Arrow and various performance optimizations. The commits involved changes to the core WiredTiger data structures and APIs, demonstrating expertise in low-level storage and database system internals. The user also made contributions to the example code, and other bug fixes across several modules.
nosqlc-plus-plusmongodb-databasedatabasemongodb
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