Day to day tasks might include ones similar to the following.
1) Implementing JSR135 MMAPI Porting Kit (VolumeControl for Linux reference implementation) so multimedia experience a big plus.
2) Collaborating with research team regarding media related questions for the customer specific implementation
3) Implementing test code for JSR135 MMAPI Porting Kit

Future contractor could help with:
1) Implementing full video support for JSR135 MMAPI Linux reference implementation (requires C,C++,Java, MIDP skills)
2) Porting JSR135 MMAPI required by specific customer engagements that would include development (C,C++, Java), testing , TCK and possibly some level of documentation.

I know that this is not a lot of information, and I have never worked with JSR135 Mapping before so please let me know if you have this experience or know someone that does.