You could also supplement your learning by doing a couple of standard industry certifications related to security, although I do not know how relevant something like CISSP would be in quant finance environments, it would give you a little bit of background, especially if you haven't been interested previously. This and other similar courses also give you a considerable foot in the door at certain environments requiring security clearances.

I agree with the rest of the comments that a github profile (even contributing to interesting projects you didn't create yourself) outclasses a CV, I'll post a video by Continuum Analytics about why python is getting so strong in science in analytics, but can't seem to find right search criteria, right now.