These guys need all the help they can get
https://summerofcode.withgoogle.com/organizations/5111396454...
it's a Java backend with massive D3 frontend and import tools in Python. There is a lot of issues at https://github.com/cBioPortal/cbioportal
And contributing is really smooth, the core developers reply fast and are easy-going. Your github looks like you're interested in testing and that's one area cbioportal is quite lacking. Might be worth a shot.
EDIT: Ozvi se, kdybys potreboval pomoc ;)