Hi, I'm Thijs

I'm a technical evangelist, public speaker and published author.

About me

About Thijs Feryn

My name is Thijs Feryn. I'm the Technical Evangelist at Varnish Software, the company behind the Varnish Cache open source caching technology.

My mission is to bridge the gap between code and infrastructure. I focus on web performance, software scalability, and content delivery. I demonstrate content-driven and technical messaging through presentations, videos, books, blog posts, social media posts, podcasts, and other media.

I'm a published author and wrote Getting Started with Varnish Cache and Varnish 6 by Example.

As a public speaker, I have a track record of over 341 presentations in 23 different countries, where I am often praised for my energetic and engaging presentation style.

My presentations

I typically speak at tech conferences and meetups, but I also have experience speaking at trade shows and other commercial events.

My talks range from in-depth technical presentations and hands-on workshops, to high level value proposition presentations. I even do inspirational keynotes from time to time.

Past and upcoming presentations
3 Upcoming presentations

I have 3 upcoming presentations scheduled.

341 Past presentations

My public speaking track record.

23 Countries

I've presented in 23 countries.

19 Years of experience

I have 15 years of experience as a public speaker and 19 years of experience as a tech professional.

Upcoming presentations 3


Being a Technical Evangelist and a public speaker, my presentations are sometimes recorded. But as an Evangelist I also record videos myself: travel vlogs, educational videos and marketing material.

Here's a short selection of some recent speaking videos, but click the Watch more of my videos button below to see a more exhaustive list of videos.

Watch more of my videos

My books

I'm a published author of 2 books, both about the Varnish technology.

The first book I wrote is called Getting Started with Varnish Cache and was published by O'Reilly Media in 2017. The book covers the Varnish Cache open source technology. Compared to my other book this first one is quite compact and covers the basics of Varnish.

My second book is called Varnish 6 by Example and was published by Vulkan Media in 2021. While this book is also primarily focused on Varnish Cache, the scope is a lot broader. Varnish 6 by Example also talks about the commercial version of Varnish, called Varnish Enterprise.

Varnish 6 by Example

My latest book covers a broad range of Varnish-related topics.

Published in 2021 by Vulkan Media.

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Getting Started with Varnish Cache

My first book is an introduction to Varnish Cache.

Published in 2017 by O'Reilly Media.

More information