I did the same thing, and ended up working for an early-stage biotech company doing some combination of hardware design, signal processing, machine learning, an

I did the same thing, and ended up working for an early-stage biotech company doing some combination of hardware design, signal processing, machine learning, and experiment design. For better or worse, people generally seem to think a math degree implies "smart" and tend to be willing to overlook a lack of any specific skills...