Adrien Loison is a Staff Software Engineer based in Paris with 11 years of experience building scalable, product-focused systems for teams ranging from startups to global platforms. He has driven revenue and international launches at Box and BlaBlaCar, shipping localization frameworks, a company-wide localization platform, and self-serve seat purchases that simplified flows and increased adoption. A pragmatic engineer and technical leader, Adrien co-created the popular open-source Spout library for fast spreadsheet read/write at scale and contributed key fixes around date/time and sheet ordering. Comfortable leading cross-functional initiatives, he blends hands-on backend work with product-minded solutions that demystify complexity for non-technical users.
11 years of coding experience
10 years of employment as a software developer
Master's degree Computer Science, Master's degree Computer Science at Université de Technologie de Compiègne (UTC)
Master Computer Science, Master Computer Science at Chalmers University of Technology
Read and write spreadsheet files (CSV, XLSX and ODS), in a fast and scalable way
Role in this project:
Back-end Developer
Contributions:44 releases, 27 reviews, 283 commits in 7 years 5 months
Contributions summary:Adrien primarily focused on enhancing the spreadsheet reader/writer library, "Spout," by adding support for various features. They fixed a bug related to date formatting when handling the "General" number format. The user then implemented functionality to retrieve XLSX sheets in their order of appearance in the file, improving compatibility. Further contributions included adding support for cells formatted as time values. Finally, they added an option for returning formatted dates.
Contributions:3 commits, 2 PRs, 14 pushes in 2 years 5 months
memorymysqldata-setlarge-datamemory-issues
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Adrien Loison - Staff Software Engineer at BlaBlaCar