I like to deal with complex systems with complex relationships, whatever they may be. Given that, the exact nature of the problems to work with is not that important, even though I prefer things related to mathematics, computer science or programming.
At work I supervise a team of developers, guiding and mentoring them, as well as doing technical work myself.
I spend my free time doing different hobby projects, mostly cross-over between mathematics and programming. I am especially fond of problems involving dynamical systems, evolutionary algorithms, machine learning and simulations.