Master thesis

Hi,
I want to do master thesis, i am computer science informatik student in Germany. My plan after completion of study to join industry for job. so i am confused which topic i should choose to do my thesis that will help me later to find job easily. So i want field/topic which current hot in the market. as i know Mobile application or any thing related to mobile is very hot in the market these days. its just my opinion, i ma really looking forward to your suggestion. thanks

or please suggest me organization, company or research institute to contact for master thesis.

Regards,
Ijaz