I don't have a specific idea or non-profit in mind, but as a developer (professional, 10+ years experience making web applications and a few on mobile) that has

I don't have a specific idea or non-profit in mind, but as a developer (professional, 10+ years experience making web applications and a few on mobile) that has been working on hobby projects for a long time I have been looking to use my skills to better the world in some way for quite some time. I would like to offer my services to help build this app (free of charge of course).