Regarding the project ideas, there's TON Footsteps initiative with some ideas and bounties set for them: https://github.com/ton-society/ton-footsteps
Also it's usually a good idea to make projects that "scratch your own itch". Do you feel a need for something in the TON ecosystem? If you do, that might me a great starting point.
Regarding the jobs, there's a Careers page on https://jobs.ton.org/
Probably not all the companies use it, so you might also check out projects on ton.app and reach out to some of them to see if they have any open positions.