Each November ELIXIR organises BioHackathon Europe, which brings together bioinformaticians from around the world. The event takes place in different locations around Europe. The BioHackathon offers an intense week of hacking, with over 160 international participants who work on diverse and exciting projects. The week starts with a half-day symposium to introduce these projects, and is followed by five days of hacking with one sole aim: coding to address problems in bioinformatics.