Custom Development of Owncloud platform (PHP/Javascript)

Owncloud is an opensource filesharing platform.
We require people with the skills to further develop the Owncloud platform for our own custom needs.
Initially we want to add some features around filesharing but may also require additional apps / features to be built.
Owncloud is written in PHP / JavaScript and so therefore is easily developed using standard development skills.
This is likely to be an ongoing development project and so teamwork may be required.

Any experience working with Owncloud is beneficial but as long as you have the core programming abilities with PHP / JavaScript we should be fine.
When bidding please include any recent projects / work you have done in this area for our consideration.

Thanks