[pedrobeltrao]

You can consider just volunteering to do a project for a biology lab. You have the tools (quantitative thinking, programming, etc) but to work in biology you need to know about some specific biology knowledge domain. There is shortcut, you need to read text-book and then review articles in a sub-discipline until you are comfortable with the area. After that, reading current research papers will get you to the cutting edge and you will start to see where you can contribute. It is possible to do this on your own but it would be much faster to get guidance, either through a course or as I said above to work directly in a lab that is doing some biological research. You would also have to figure out what areas of biology you want to work on.

[ahelwer]

Would this volunteering be a sort of extra-curricular thing? I'm averse to taking full-time unpaid internships.

[pedrobeltrao]

well, you can find a job in a bio related research lab as a programmer but you would earn (at least) 2/3 times more in a company.