One esoteric route would be to try and specialize in an area where talent is scarce. There's a lot of gameplay programmers, few engine programmers, fewer graphics programmers, and very few physics programmers (in my experience at least).

As such you could try to specialize in this area (collision detection, ray queries, rigid body simulation, constraints, solvers, softbody sim, fluid sim etc.). Of course this isn't for everyone as it requires skills and interest in: low level concurrent programming, maths/linear algebra and physical behavior intuition. If you do find these topics fascinating and can demonstrate some ability in them, your skills will certainly be in demand.