Bertrand Lemasle
Senior Backend Developer at Lucca
Nantes, Pays de la Loire, France
Summary
👤
Senior🎓
Top SchoolBertrand Lemasle is a Senior Backend Developer based in Nantes with 12 years of experience building robust, scalable .NET APIs and platform infrastructure for high-traffic products. He has led API redesigns, CI/CD overhauls, and migrations to .NET Core while improving observability and resilience with Grafana, Prometheus, Elasticsearch and Kubernetes. At companies like Allociné, MANGOPAY and Lucca he balanced performance-driven architecture (caching, messaging, rate limiting) with pragmatic operational practices across Azure, AWS and on-premise environments. He prefers projects with real-world hardware or R&D dimensions and avoids pure financial or consulting-regie contexts, reflecting a user-impact and craft-first mindset. A careful open-source contributor, he has strengthened Firebase .NET authentication for Twitter OAuth and improved error handling in community libraries. He combines hands-on engineering with a focus on durable, maintainable solutions rather than flashy perks.
12 years of coding experience
6 years of employment as a software developer
IUT Informatique, IUT Informatique at Université du HavreIngénieur Génie Informatique et Automatique, Ingénieur Génie Informatique et Automatique at Institut des Sciences et Techniques de l'Ingénieur d'Angers
French, English
Github Skills (9)
error-handling10
firebase-authentication10
csharp10
firebase10
oauth10
dotnet-core10
dotnet9
net9
asp-net9
Programming languages (11)
Github contributions (5)
step-up-labs/firebase-authentication-dotnet
Nov 2019 - Nov 2019
C# library for Firebase Authentication
Role in this project:
Back-end Developer
Back-end DeveloperContributions:5 commits, 1 PR in 2 days
Contributions summary:Bertrand contributed to the Firebase Authentication library by adding features related to Twitter OAuth authentication. They implemented the `SignInWithOAuthTwitterTokenAsync` method, enabling authentication via Twitter access tokens. Furthermore, the user focused on improving error handling within the library by adding more specific error reasons and refining existing error detection mechanisms, enhancing the library's robustness. They also improved code formatting for consistency.
firebase-databasefirestorec-libraryfirebaseauthentication
blemasle/mls800-enclosure
May 2014 - Jan 2019
Contributions:108 commits, 4 pushes in 4 years 8 months
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