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Hi! I’m Dennis Claassen.

I’m currently a lead developer at Yoast, leading 2 development teams. Each is part of a multidisciplinary squad, in which we focus on Yoast SEO for Shopify, and the Yoast.com website and MyYoast customer portal.

Continue reading on more about me. And if you want to get in contact or stay up to date with what interests me at the moment, the best places to find me are:

Latest posts

  • Moving to WordPress: when static generation wasn’t enough

    After years of building my personal site with Jekyll and YAML files, I made the switch to WordPress. It wasn’t a gradual decision or a careful evaluation of CMS options. It was more sudden than that.

  • How I built my YAML-powered Jekyll site

    Maintaining a Jekyll site by extracting data into YAML files. How Dennis Claassen.nl was built on top of GitHub Pages and evolved to an SEO playground.

  • History behind Dennis Claassen.nl

    How Dennis Claassen.nl went from a LinkedIn-powered headless site, via a YAML-powered static site, to the overpowered WordPress site it is today.

For more posts, continue to the blog.

Latest events

  • WordCamp US 2025

    August 26, 2025 August 29, 2025

    WordCamp US 2025 is a first for me. I’m representing Yoast, with a booth to run, people to meet, and plenty of curiosity about all things happening across the ecosystem.

  • Editions.dev 2025

    May 29, 2025 May 30, 2025

    Returning to Toronto for the second editions.dev. There’s such an energizing atmosphere, I really enjoy hearing what new foundations Shopify is creating and what their partners are building on those.

For more events, continue to the calendar.