Got something to contribute?
The first step is to get the code. You can branch the backend code from Launchpad by using the following command:
bzr branch lp:backend
Once you've got the code, use it, and report any bugs you may encounter or questions you might have on Launchpad
Should you make any changes to the code, and like to see it included in the backend code, just submit your branch to Launchpad for merging.