If you are looking for jobs in the startup field having a look on the Angel List job board will be always worth it:
https://angel.co/berlin/jobs
Startup jobs all over Germany, including Berlin of course, you can find here:
http://www.gruenderszene.de/jobboerse/
http://venturevillage.eu/jobs/
http://www.deutsche-startups.de/startups-jobs/stellenangebote/
If you have technical background check Stackoverflow Careers:
http://careers.stackoverflow.com/jobs?searchTerm=&type=any&location=Berlin&range=20&distanceUnits=Miles
Outside of the startup scene I can recommend to have look at:
http://eu.experteer.com/jobs/berlin
http://de.indeed.com/Jobs?q=&l=berlin
Stepstone
And, of course, there is always the option to work remotely 
:
Please see a list of the best remote working job platforms here:
A great place for job hunting are meetups.
Contact the organizers and let them know that you are interested to move Berlin. Great talent is rare . Here are some great meetups worth checking in:
Meetups Berlin
Last but not least, you can sign up for the Teleport Job Tracker. Sign up with your email and Teleport will start working on getting job offers from Berlin delivered to you. It's free. No strings attached. You can unsubscribe anytime. https://teleport.org/cities/berlin/salaries/
Good luck.
