There is also this position: https://www.facebook.com/careers/department?dept=infrastruct...

"Facebook is looking for someone to assist in the Airframe assembly efforts development phases of their high-altitude solar powered aircraft. A successful candidate will be able to assist with airframe assembly and integration."

High altitude solar aircraft? Sounds similar to the Solar Impulse 2, but what does Facebook want with that?

Told ya!! http://arstechnica.com/information-technology/2014/03/facebo...

The job is primarily centered around maintenance.

The interesting part is the solar cells, maybe a solar powered drone for very long flight times?

ohh, maybe it's something similar to Google Loon project but to put Facebook in the hands of all...