Comment 192 for bug 532633

You can contribute anywhere you can so if you can write a good bug report join the testing team.
If you can develop start contributing code and apply to be a contributing developer.
You can become a MOTU.
Just go to the irc channel of the team you want to join and ask where to start.

There are lots on non canonical employees contributing to make ubuntu better. All you have to do is apply whatever skills you have. Contributing ideas and opinions is helpful but as I said above "I think there will always be many chefs and not enough cooks."