Etienne Callies
Research Engineer at Ouihelp
Greater Le Havre Area France
Summary
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Rockstar🎓
Top SchoolEtienne Callies is a research engineer with a decade of experience building data-driven systems and algorithms across industry and academia from Greater Le Havre, France. He has blended applied research and production software work—designing a linear logic tool with ENS Lyon, developing trip-search algorithms at BlaBlaCar, and delivering ETL and cloud migrations for nonprofit platforms. Currently at Ouihelp, he focuses on research-driven engineering initiatives that bridge theory and product. Trained at École Polytechnique and MINES ParisTech, he brings a strong math-and-CS foundation to practical problems in search, data mining, and operational research. A pattern in his career is moving between research prototypes and scalable production code, making him adept at turning formal ideas into reliable systems.
11 years of coding experience
5 years of employment as a software developer
Maison Saint Jean-BaptisteMaster, Mathématiques et informatique, Master, Mathématiques et informatique at Ecole polytechniqueIngénierie informatique, Ingénierie informatique at MINES ParisTech
Stackoverflow
21reputation
9kreached
1answer
1question
Github Skills (88)
postgresql10
python10
databases10
etl10
backend10
data-pipeline10
sequent-calculus10
ai-agent10
data-engineering10
dotenv10
ai10
elt10
pipeline10
data-integration10
database10
Programming languages (12)
Github contributions (5)
confessio-labs/confessio
Aug 2024 - Jul 2026
A search engine for confession hours by scraping parish websites.
Contributions:1 review, 22 PRs, 941 pushes in 1 year 11 months
search-engine
ComputerAidedLL/click-and-collect
Mar 2021 - Sep 2021
A web interactive tool for building proofs in the sequent calculus of Linear Logic, with its backend written in OCaml
Contributions:53 reviews, 416 commits, 112 PRs in 6 months
backendocamlsequent-calculus
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