Quentin Santos
Software Engineer at Helsing
Paris, Ile-de-France
Summary
👤
Senior🎓
Top SchoolQuentin Santos is a Paris-based software engineer with 12 years of backend and security-focused experience, currently contributing at Helsing. He combines hands-on development with a strong emphasis on reliability, code quality, and scalable deployments, having led CI pipelines, testing strategies, and security initiatives at TrustInSoft and ENGIE. An active open-source contributor, he has shaped Rust linting tooling (rust-clippy), security-oriented Python crypto libraries (python-paillier), and browser-based Python tooling (Brython), with notable fixes in radare2 and Rust code quality checks. His work spans industry and research, including Python APIs, high-assurance cryptography, and secure deployments, reflecting rigorous academic training through a PhD in Mathematics and Computer Science from École normale supérieure. He has a proven track record of cross-disciplinary collaboration, mentoring, and driving customer-focused initiatives, including ISO-26262 qualification, CI/CD automation, and DevOps modernization. Based in Paris, he holds a PhD from École normale supérieure and a Master’s degree from ENS Lyon, and has a long history of consulting and technical leadership across research labs and open-source communities.
13 years of coding experience
4 years of employment as a software developer
Doctor of Philosophy - PhD, Mathematics and Computer Science, Doctor of Philosophy - PhD, Mathematics and Computer Science at École normale supérieureMaster's degree, Mathematics and Computer Science, Master's degree, Mathematics and Computer Science at L'École Normale Supérieure de Lyon
Japanese, French, English
Stackoverflow
1,937reputation
62kreached
15answers
1question
pandas
top-5%
python
top-5%
Github Skills (60)
debugging10
debug10
javascript10
assembly10
python10
testing10
clippy10
radare210
c1110
binarydiff10
x8610
c1710
lang10
code-analysis10
compiler-compiler10
Programming languages (16)
Github contributions (5)
data61/python-paillier
Mar 2018 - Apr 2018
A library for Partially Homomorphic Encryption in Python
Role in this project:
Back-end Developer & Security Engineer
Back-end Developer & Security EngineerContributions:5 commits, 1 PR, 16 comments in 1 month
Contributions summary:Quentin primarily focused on improving the project's security and robustness through implementing pure-Python fallback methods. Their contributions include a pure-Python fallback for prime number generation and a fix for the `invert()` function to enhance the library's functionality. The user also updated the CHANGELOG and addressed minor code style issues by removing trailing whitespace. This demonstrates an active role in ensuring the project's maintainability and security.
cryptographypythonpaillierhomomorphic-encryptionencryption
brython-dev/brython
Jul 2016 - Sep 2016
Brython (Browser Python) is an implementation of Python 3 running in the browser
Role in this project:Back-end Developer
Back-end DeveloperContributions:12 commits, 9 PRs, 20 comments in 1 month
Contributions summary:Quentin contributed to the Brython project by fixing bugs related to import statements and generator evaluation. They modified core JavaScript files (`py2js.js`, `brython.js`, `brython_dist.js`) to correct syntax errors in import handling and improve the generator's functionality. Furthermore, they added a `json.load()` method to the `json` module and incorporated the `co_flags` property in Code objects for improved Python code compilation within the browser. These changes demonstrate a focus on improving the core functionality and stability of the Python-in-browser implementation.
pythonbrowserbrythonpython-3python3
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