Dennis Paagman

Hi! 👋 I'm Dennis Paagman, an independent, product focused developer. I've been building Ruby on Rails apps for 15 years, and these days I help teams ship faster with AI agents.

Dennis Paagman

I've got some availability for new clients!
The agents still need a human at the wheel. Let's chat.

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Recent articles

Irregular random thoughts, stories and ideas.

Ruby

How fast can you actually patch Ruby?

I had to wait for a Docker community image before I could patch Ruby. So I checked how long Ruby 4.0.9 took to reach installers, version managers, containers and hosting platforms.

Ruby

Introducing Rebundler: make your Gemfile look great with a single command

A new tool that automatically sorts, groups, and annotates your Gemfile.

Ruby on Rails

Making sure local CI is green before deploying to Heroku

Automatically run Rails 8.1's local CI before deploying to Heroku. This ensures your CI is green before you deploy.

Hotwire Native

Hotwire Native is extremely future proof

The release of iOS 26 and its new design shows how future-proof Hotwire Native is. No code changes required to upgrade your app to the new look.