Sebastien Robert
Senior Platform Engineer
Grenoble, Auvergne-Rhône-Alpes, France
Summary
👤
Senior🎓
Top SchoolSebastien Robert is a Senior Platform Engineer based in Grenoble with 11 years of experience crafting tools, backend services and graphics-focused client applications across game, AI and enterprise domains. He combines deep .NET/C# and WPF expertise with low-level experience in 3D graphics, networking and device integration—skills honed at startups he co-founded and at R&D roles for major game studios. Sebastien moves easily between front-end refinement (notably improving OpenSeadragon’s rendering and subpixel transparency) and backend robustness (contributions to Countly’s server reliability and versioning logic). As an engineer-founder he’s equally comfortable shipping production inference tooling for AI and building developer-facing UIs and pipeline tools, bringing a pragmatic, systems-minded approach to platform problems. Outside work he fuels his curiosity and focus through cycling, bouldering and snowboarding, traits that mirror his iterative, hands-on engineering style.
11 years of coding experience
14 years of employment as a software developer
Computer Programming, Computer Programming at Ecole pour I'Informatique et les Techniques AvancéesBaccalaureate STI, Electronic Specialty, Baccalaureate STI, Electronic Specialty at Lycée Scientifique et Industriel Gustave Eiffel
French, English, Japanese
Stackoverflow
616reputation
28kreached
2answers
3questions
Github Skills (25)
javascript10
high-resolution10
viewer10
back-end-development10
es6-promise10
image-viewer10
indexing10
indexer10
nodejs10
plugin9
mongodb-database9
mongodb9
version-control9
html8
performance-optimization8
Programming languages (8)
Github contributions (5)
Countly/countly-server
Jul 2019 - Jun 2020
Countly is a product analytics platform that helps teams track, analyze and act-on their user actions and behaviour on mobile, web and desktop applications.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:7 commits, 7 PRs, 2 comments in 11 months
Contributions summary:Sebastien primarily focused on improving the reliability and maintainability of the Countly server. Their contributions included fixing regular expressions for version matching and ensuring correct version comparisons within the application's versioning logic. They also worked on improving the robustness of database indexing operations and refactoring the plugin manager's dispatch function, adding features like `dispatchAllSettled`. The user also contributed code for resolving relative paths within the Countly project.
gdpr-compliantmarketing-automationdatahipaaremote-config
openseadragon/openseadragon
Dec 2021 - Jan 2022
An open-source, web-based viewer for zoomable images, implemented in pure JavaScript.
Role in this project:Front-end Developer
Front-end DeveloperContributions:1 review, 7 commits, 2 PRs in 1 month
Contributions summary:Sebastien primarily contributed to enhancing the OpenSeadragon viewer's rendering capabilities, especially concerning transparency and subpixel rendering. They implemented changes to improve how transparent images are displayed, making the fix configurable across different browsers. The user also refactored and improved the underlying tile rendering logic, introducing and adjusting subpixel rounding behavior, and refactoring the code to support new rendering states. Additionally, they addressed a sizing issue, improving full-page display.
imageviewerimagezoomable-imagesopenseadragonimage-viewer
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