Guillaume Besson
Verified Expert in Engineering
Software Developer
Lyon, France
Toptal member since May 5, 2021
Guillaume is an entrepreneur and a passionate full-stack developer. He helps companies build fast, secure, and highly usable products. He has worked with YCombinator startups and created solutions to scale products to over 25 million active monthly users. He built a robust, international in-house live video CDN in over ten countries serving 50 million hours of video monthly. Guillaume enjoys developing practical, personal projects and open-source libraries.
Portfolio
Experience
- Node.js - 10 years
- JavaScript - 10 years
- WebSockets - 6 years
- PostgreSQL - 5 years
- Redis - 5 years
- React - 4 years
- ComfyUI - 2 years
- Generative Artificial Intelligence (GenAI) - 2 years
Work Experience
Full-stack Developer
VacationRenter
- Integrated multiple external service APIs to bring their data into a unified database with a much faster response time than the original APIs.
- Integrated new features in the React front-end code while optimizing the loading time.
- Built a full CI pipeline with CircleCI and Google Cloud to test, build, and deploy the front-end and back-end code automatically.
Full-stack Developer
Streamup
- Built and deployed the chat system handling 250,000+ simultaneous users in real-time. Open-sourced the code for the back end on Github. Used Node.js, Redis, and AWS.
- Migrated the live video player from Flash/RTMP to HTML5/HLS.
- Built and deployed an international in-house live video CDN in over ten countries serving 50 million hours of video each month. Optimized for speed, quality, and cost-effectiveness.
Project History
RoundGames
Soundsync
Skills
Libraries/APIs
Node.js, React, WebRTC, Web Audio
Tools
ComfyUI
Languages
JavaScript, TypeScript, GraphQL, C++
Frameworks
Flux
Platforms
Amazon Web Services (AWS), Linux, Kubernetes
Storage
PostgreSQL, Redis, Google Cloud
Other
WebSockets, Scaling, HTTP Live Streaming (HLS), Stable Diffusion, Generative Artificial Intelligence (GenAI), Image Generation, PostGraphile, Content Delivery Networks (CDN), Streaming, AirPlay
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