Android app developer needed now

5+ years of experience in Android needed. Android developer needed for video encryption and decryption. Need it for prototype purpose. Just need to play video which should be encrypted all the time,decrypt while playing and encrypt after playing is [login to view URL] can be from 10 MB to 0.5GB [login to view URL] should be high. These files cannot be transferable or played on other devices. Should be played only in 1 device which app is installed. Send the code to review ,we test it and send release the milestone. Please apply only if you have expereince. We have many more tasks and lead into full time if performed well.