In the summer of 2014, we partnered with a web integrator to design and build the website for the European Year for Development 2015 (europa.eu/eyd2015), a collaborative platform to publish stories from the field on development and announce events related to the theme year. In a first phase, we created an IA and design for the site. Then, the integrator took the lead and developed the site in agile sprints, with us in support. The website is now running successfully, with many partners publishing stories and events related to EYD2015. In this talk, I share some techniques we have used and lessons we have learned in working together with developers in an agile set-up.