Amazon Web Service — Summer 2022

During this research internship at Amazon Web Service in Seattle, I worked on formalizing the semantics of the Dafny verification language, and verifying compiler transformations applied on Dafny programs. This work was carried in Dafny itself. The end goal is to bootstrap the Dafny compiler, in order to have a verified compilation pipeline from Dafny to its various target languages (Java, C#, Go, etc.). The result of this work is in the following repository, and there is a blog post coming.

Microsoft Research — Summer 2021

During this research internship at Microsoft Research, I explored the verification of Rust programs. This eventually led to my current project, Aeneas, a verification framework which generates pure models from safe Rust programs, for the purpose of verifying those programs. You can learn more here, or read our paper (ICFP, long version).

Carrefour China - 家乐福中国 — 2018-2019

I worked almost a year in Shanghai for Carrefour China, the Chinese branch of the French retailer, on the development of data offers and data partnerships. I supervised the design and implementation of Business Intelligence products by the IT team, recruited data-analysts, negotiated with suppliers and partners, and handled contract drafting and signature.

Prove & Run — 2017-2018

I worked for 9 months at Prove & Run on ProvenTools ®, an environment to develop mathematically verified programs in an industrial setting. My task was to design and implement a mechanism in Java to embed the programs written and verified with ProvenTools ® into the logic of the Coq proof assistant.

The goal of the project was to improve the confidence one can have in the programs verified with ProvenTools ®, by giving the possibility to use a widely-known and trusted proof assistant to independently recheck the properties proven about those programs.

CakeML, CSIRO’s Data61 — 2017

During my master internship I worked on the CakeML project, which aims at developing a framework to write SML programs verified down to the compiled executables. I worked on a mechanism which automatically synthesizes stateful ML code from pure, monadic functions written in the logic of the HOL4 theorem prover, while generating a proof in HOL4 that the synthesized ML code correctly implements the functions defined in the logic. We presented our results at IJCAR2018, and the slides are available here.

IDEMIA — 2016

During my second year at École polytechnique, I did an internship at IDEMA, one of the world leaders in biometrics, to develop semi-automated image labelling tools in Python.

The goal of such tools is to speed-up the work of classifying images (say: giving the labels “cat”, “dog”, “horse”, etc. to images of animals) in order to generate training datasets for machine-learning algorithms. They work by learning the classification while the user is working on it and using this knowledge to assist him in doing so, in our case by grouping images that the user could select and label at once.

In practice, by using the tools I implemented, one could label tens of thousands of images per hour without much effort.