> Markdown version of [/@thijs-feryn](https://www.wearedevelopers.com/@thijs-feryn). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Thijs Feryn Technical Evangelist at Varnish Software helping developers scale through smart HTTP caching. ## About Thijs Feryn tackles web performance and scalability as a Technical Evangelist at Varnish Software. After 15 years in the web hosting industry, he now helps developers build fundamentally faster systems through better caching strategies. An active contributor to the PHP and Varnish open-source communities, Thijs regularly breaks down how HTTP caching mechanisms actually work. His talks cover everything from configuring cache headers to eliminating CI/CD pipeline delays by proxying build artifacts. He is the author of *Varnish 6 by Example* and has spoken at hundreds of engineering events worldwide. ## Past Sessions ### World Congress 2026 Europe 路 July 8, 2026 Berlin, Germany - [Speed up your CI/CD pipelines by caching build & runtime artifacts](https://www.wearedevelopers.com/videos/100107-speed-up-your-ci-cd-pipelines-by-caching-build-runtime-artifacts) 路 30 min 路 馃帴 Watch recording ### World Congress 2025 路 July 9, 2025 Berlin, Germany - [HTTP headers that make your website go faster](https://www.wearedevelopers.com/videos/1676-http-headers-that-make-your-website-go-faster) 路 30 min 路 馃帴 Watch recording ## Videos - [Speed up your CI/CD pipelines by caching build & runtime artifacts](https://www.wearedevelopers.com/videos/100107-speed-up-your-ci-cd-pipelines-by-caching-build-runtime-artifacts) 路 Thijs Feryn - [HTTP headers that make your website go faster](https://www.wearedevelopers.com/videos/1676-http-headers-that-make-your-website-go-faster) 路 Thijs Feryn ## Links - [X](https://twitter.com/thijsferyn) - [LinkedIn](https://linkedin.com/in/thijsferyn)