Hi 👋

I'm Jesper, a software engineer with 14+ years building systems that range from web applications to backend infrastructure and payment platforms. Ruby is my home base, but I move across languages and stacks as the problem demands.

Read more about me here, on LinkedIn, or on my Github profile.

I'm also working on several side-projects, including Measurehub, DevJobsDK, Webshop Index and Skatman.

Get in touch via email or Twitter.

Blog posts

Running commands in parallel in multiple folders using tmux January 2024
Running an LLM locally November 2023
i3 tips and tricks November 2023
Ruby on Rails on Caprover June 2023
Adding reference with different model name in Rails 7 October 2022
Vimium chrome extension shurtcuts March 2022
Upgrade rails app to sprockets 4 November 2021
JSbundling and esbuild in Rails 6 application October 2021
Increase postgresql performance for development October 2021
Change vim and terminal theme variant with a single command March 2021
Replacing Google Analytics with Plausible Analytics January 2021
Migrate Rails app to Haml January 2021
Use sprockets for javascript in rails 6 December 2020
Daily journal script December 2020
Install Vim from source on Ubuntu August 2020
Adding reference with different model name in Rails 6 June 2020
Migration from OSX to Ubuntu part one January 2020
Goodbye Disqus October 2019
Using webpack-bundle-analyzer in rails October 2018
New design: Bulma.css vs. Bootstrap October 2018
Running only failing tests with RSpec September 2018
Speeding up Rails deploys to Heroku August 2018
Adding reference with different model name in Rails 5 March 2018
Replacing Poltergeist/PhantomJS with Headless Chrome December 2017
Migrating from React-on-rails to Webpacker May 2017
Learning React - Resources June 2016
Faster Android Development part 2 April 2016
Faster Android Development February 2016
Ruby on Rails Memory Profiling July 2015
Life is a Trello Board March 2015
Previewing emails in Rails 4 February 2015
Treat your resume as code January 2015
Going Freelance January 2015
Profiling RSpec tests December 2014
Accelerated learning October 2014
Rails with PostgreSQL on Docker using Fig August 2014
Deploy Rails with PostgreSQL to Dokku July 2014
Breaking down Rails 2 using plugins July 2014
Ruby installations on steroids March 2014
Improve your posture with these exercises January 2014
Work on multiple branches with Git workdir October 2013
Faster Git workflows October 2013
Migrate Rails to JRuby on Heroku November 2012
Show Rails environment in Pry October 2012
Ignore specific requests with VCR June 2012
Radical Feature Justification May 2012
Import Heroku databases locally April 2012
Metrics driven development March 2012