In which conditions you will join a startup ?
Is it based on experience it will give or the manager goals and background or on the project they are planning to do.

Share with me what are the criterias you may accept to join a startup

At least average pay, no overtime (time account for slacking off), sustainable business plan.

Oh wait, startups mostly think that they rather spend their money on big office, big cars for management and then pay shit salary for devs with lots of unpaid overtime. Well, then good luck.