Erwan Loisant
Senior Software Engineer at Datadog
Nantes, Pays de la Loire, France
Summary
👤
Senior🎓
Top SchoolErwan Loisant is a trilingual senior software engineer with 21 years of experience building scalable web and realtime data systems, currently at Datadog after leading realtime data pipeline efforts as Tech Lead at Zendesk Explore. He blends deep backend expertise in Java/Scala with practical devops and build-tool improvements, evidenced by notable contributions to the Play Framework (asset compilation, JS minification) and jwt-scala (dependency and build modernization). Based in Nantes, France, he has a strong academic foundation including Ph.D.-level research in Japan and a history of architecting web platforms at companies like prismic.io and Zengularity. Comfortable both leading teams and shipping low-level infrastructure changes, he has a demonstrated knack for improving build pipelines and async error handling—work that quietly improves developer velocity across large codebases.
21 years of coding experience
18 years of employment as a software developer
Ph.D. Computer Science, Ph.D. Computer Science at Tokyo Metropolitan UniversityM. Sc. Computer Science, M. Sc. Computer Science at Ecole Polytechnique de l'Université de Nantes
French, Japanese, English
Stackoverflow
1,295reputation
121kreached
8answers
25questions
Github Skills (28)
dependency-management10
closure10
javascript10
apidoc10
google-closure-compiler10
sbt10
java10
scala10
javas10
api10
web-framework10
lessc10
async9
circe9
asynchronous9
Programming languages (18)
Github contributions (5)
jwt-scala/jwt-scala
Jun 2019 - Jan 2023
JWT support for Scala. Bonus extensions for Play, Play JSON, Json4s, Circe, uPickle, Spray and Argonaut
Role in this project:
Back-end Developer
Back-end DeveloperContributions:34 releases, 9 reviews, 426 commits in 3 years 8 months
Contributions summary:Erwan contributed to the project by adding and updating dependencies, including Scala versions and libraries such as Circe, Scalatest, and upickle. They also upgraded the SBT and Scala versions, and introduced a scalafmt formatting tool and applied it to project files. The user's commits included changes to build configurations (sbt) and dependency management files, demonstrating a focus on project maintenance and dependency management.
upicklecircejwt-supportplay-jsonscala
playframework/play1
Aug 2010 - Aug 2011
Play framework
Role in this project:Back-end Developer
Back-end DeveloperContributions:214 commits in 1 year
Contributions summary:Erwan's commits primarily focus on enhancements to the Play framework's core functionalities. They introduced a utility function for joining strings and implemented its usage in the Binder class. They also made several updates to the WSAsync class, which includes improving its error handling. Further contributions include implementing support for HTTP methods, such as TRACE and fixing the asynchronous API.
agileplay-frameworkframeworkjavaweb-framework
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