Is it permissible to work in the kitchen of a cafeteria that serves meals and shisha, given the financial need and the unavailability of other work?

Shisha (hookah) is forbidden in Islam. It is not permissible to smoke it, sell it, or assist in any way with it. If your work is not related to serving shisha, then there is no sin upon you for working in the shop. However, it is better to leave it and seek work in a place that does not offer forbidden things.