- Shorter work week (i.e. the job would be part-time).

- Projects that are both actually advanced technically and from field that interests me. Big bonus points if they are written in languages I already like or want (would want) to learn.

- Team from which I can learn plenty of interesting things. Note that this would be very hard to achieve if the team has nobody with more than five years of professional experience.

- Formal approval of me working in company time, in non-insignificant amount, on an open source project. The project may be, or probably even should be, proposed by the employer, but I should have the final decision on whether I want it or not.

Order of the above points is arbitrary.

Nothing. Making money is the only reason why I work so I would never consider a job with a smaller paycheck.

Positive career outlook in the future, work-life balance, better benefits that make up for it, etc.

-More job flexibility (i.e. remote work options)

-A more desireable company mission