I though this might be interesting for you:
ESA is currently looking for app developers for a one-week App Developer Camp.
On www.app-camp.eu you can apply until 25 March.
Only requirement is, you should have already published an app, if Android or iOS does not matter.
20 developers will be invited for one week, between 3 and 10 June, to Frascati (near Rome).
Greeting Anna