There are problems everywhere that need solving, from a few lines of code (bug fix), all the way to completely new solutions unlike anything known in existence.

There are problems everywhere that need solving, from a few lines of code (bug fix), all the way to completely new solutions unlike anything known in existence. The real questions back to you are: 1. What are your resources? (Time, money, people, space, hardware, software, etc.) 2. Does the problem need to be profitable or is this philanthropy? 3. What motivates you to work? (World issues, local issues, tough mathematical problems, etc.) Trying to find something that falls within the cross-section of all these problems, I would suggest working on problems that curve energy usage. Anything that reduces energy usage is almost guaranteed to be profitable, reduce carbon emissions and generally make the world a better place. Some ideas around this theme: * Passive/intelligent cooling of small/medium sized spaces that can be retroactively applied to human inhabited spaces. Air conditioning boxes are ludicrously inefficient, there should be some very simple methods to greatly increase their effectiveness. * Software to reduce desktop computer power usage - especially in offices where they effectively get left on all of the time over night. I think a ridiculously large number of office workers could also be working on passively cooled ARM based computers. (Windows did/does support a Raspberry Pi for example, so they've already done the legwork.)