When approached to work for my current company I met with my future manager and asked:

Will I be able to have a more senior developer act as a mentor?

Will I have direct access to more experienced devs on my team?

What opportunites will there be to try something new and get it reviewed?

Are there any tech stack absolutes I will never be able to stray from?

The answers I received were great and ended up being accurate.

It was the first time I had ever decided to choose a company based primarily on the potential for growth and not money/perks/etc.

Smartest decision ever.