Lazarus is a community developed project. It depends on a world wide group of volunteers to contribute to progress forward. Everyone can join in to make the open source Lazarus community stronger. You can start by joining the discussions on our forums, submitting your Lazarus projects to our projects page, or sharing something you've created in our showcase page.
If you're interested in contributing to the compiler or ide, a good place to start is by introduce yourself on on the official mailing lists for Free Pascal and Lazarus.