What can a technologist do about climate change?
This was a major motivating reason for me to start building tools for collective intelligence augmentation, like Engelbart I choose to focus on meta problem that I see as having largest impact, but ymmv http://worrydream.com/ClimateChange/
There is but one truly serious philosophical problem and that is serendipity. Judging whether or not the universe is a surprisingly lucky place for humans amounts to answering the fundamental question of philosophy.
(with apologies to Camus)