The success of the Ubuntu Project depends on a wide community of talented, passionate developers.
Anyone with the right technical skills can contribute. If you're new to the process, you can find a mentor within the development team to help you along.
There are lots of tools to support your efforts. You can find information about how Ubuntu is built in the developer documentation , which is maintained on the Ubuntu wiki. It explains how the development team is structured, provides technical information about building Ubuntu, and indexes other useful resources for current and prospective Ubuntu contributors.