iOS Development traineeship
When I started at DTT I had basic knowledge of iOS Development. This increased exponentially as time passed as you get a lot of responsibility and ownership of the project(s) you're working on. If you need help it's there, but it's encouraged to figure stuff out as you go, to increase your problem-solving/development skills. Even though you're an intern, you're treated as a full-fledged employee with the same responsibilities as the next one.
I view my time at DTT as very educational and a great kickstart to my career as an iOS Developer. If you are motivated and eager to learn, you fill wind DTT as the perfect place to be.