Hi, I'm Jeffrey van Rossum 👋

I'm a product engineer from the Netherlands. I've been building things for the web since 2004.

I make SaaS apps and WordPress plugins, and I design, build, sell and support them myself. Most recently I launched Datalumo (search and AI chat over your own content). I also maintain a handful of open-source projects.

I take freelance work for the right projects. I'm based in the Netherlands and work remotely, also with international clients. I often travel in Asia, including Hong Kong. A lot of that work is WordPress, Laravel, APIs and AI. You can find me on X, GitHub, YouTube and Instagram, or reach me by email.