Esther Onfroy
Co-Founder at Defensive Lab Agency
Kurikka, Mainland Finland, France
Summary
👤
Senior🎓
Top SchoolEsther Onfroy is a co-founder and information security specialist with eight years of experience in reverse engineering, mobile surveillance research, and advocacy against surveillance capitalism. Based in Finland but active in France, she leads Defensive Lab Agency and has co-founded several privacy-focused initiatives including Exodus Privacy and La Résille, supporting journalists, academics and NGOs. Her hands-on contributions to open-source tooling—such as improving APKLeaks by refactoring decompilation and packaging—underscore a practical focus on maintainability and usability in security tooling. A former math and computer science master's student, she blends rigorous analytical training with a hacker's curiosity and a cypherpunk ethos that informs both technical investigations and public-facing lecturing.
8 years of coding experience
Master's degree, Maths and Computer Sciences for Complex and Distributed Systems, Master's degree, Maths and Computer Sciences for Complex and Distributed Systems at Université du Havre
Github Skills (12)
apk10
reverse-engineering10
python10
android-security10
command-line9
cli9
bugtracking9
bug-tracker9
bugzilla9
static-analysis9
command-line-interface9
setuptools8
Programming languages (13)
Github contributions (5)
dwisiswant0/apkleaks
Mar 2021 - Mar 2021
Scanning APK file for URIs, endpoints & secrets.
Role in this project:
Security Engineer
Security EngineerContributions:1 review, 6 commits, 3 PRs in 1 day
Contributions summary:Esther focused on enhancing the functionality and maintainability of the APKLeaks tool. Their contributions included removing dependencies, refactoring the code, improving the decompilation process, and integrating a `setup.py` file for improved packaging and distribution. They also fixed issues with the command-line interface, specifically the `clr` class, indicating a focus on usability and integration.
bugbountysecurityapkendpointssecrets
PiRogueToolSuite/pirogue-os
Jan 2022 - Aug 2022
OS image for the PiRogue based on Debian 12
Contributions:23 releases, 33 commits, 2 PRs in 7 months
raspberry-pisd-cardraspbianrockchiparmbian
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