Sébastien Ros
Software Development Engineer at Microsoft
Bellevue, Washington, United States
Summary
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RockstarSébastien Ros is a seasoned Software Development Engineer at Microsoft with 16 years of experience building and optimizing ASP.NET and .NET tooling for cloud and web platforms. He blends backend systems expertise—contributing to core projects like ASP.NET Core, EF Core, Razor, and the TechEmpower benchmarks—with front-end and tooling work such as the Azure WebJobs dashboard and Razor codegen. A prolific open-source maintainer, he created and sustains projects like Fluid and contributes to Orchard, Jint, Esprima and others, showing deep familiarity with parsers, template engines, and runtime performance. His work often focuses on practical improvements that matter in production—password policy, identity, benchmarking infrastructure, and build/runtime plumbing—plus subtle UI and multi-tenancy fixes that improve developer and operator experience. Based in Bellevue, WA, he brings a rare blend of compiler-level thinking, performance benchmarking, and pragmatic product-grade engineering.
16 years of coding experience
English, French
Github Skills (66)
parserator10
authorizations10
benchmark10
parser10
expressions10
plugin-development10
databases10
azure-functions10
asp-net-core10
multitenancy10
asp-net10
http-client10
code-generation10
entity-framework10
drupal-module10
Programming languages (18)
Github contributions (5)
dotnet/crank
Apr 2020 - Jan 2023
Benchmarking infrastructure for applications
Role in this project:
Back-end Developer
Back-end DeveloperContributions:268 reviews, 452 commits, 801 PRs in 2 years 9 months
Contributions summary:Sébastien contributed to the infrastructure for benchmarking applications by updating runtime locations, adding arch requirements, adding a Docker build phase, and adding support for .NET 5.0. These changes indicate work on optimizing the build process and expanding the platform support of the project. The contributions also included adding the creation of cgroup controllers to manage resources, and the overall changes suggest a focus on the operational aspects of the project.
benchmarkbenchmarkinginfrastructure
sebastienros/fluid
Jun 2017 - Jan 2023
Fluid is an open-source .NET template engine based on the Liquid template language.
Role in this project:Back-end Developer
Back-end DeveloperContributions:73 releases, 98 reviews, 333 commits in 5 years 8 months
Contributions summary:Sébastien primarily contributed to the development of the .NET template engine, Fluid, focusing on the implementation of core parsing and evaluation logic. Their work involved parsing and compiling template syntax, including output, tag and expression support. They also added support for various control flow constructs such as `for`, `if`, and `unless` statements, enhancing the template's functionality.
template-enginedotnettemplateview-enginenet-template
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