I work at a startup based out of NYC as a full-stack engineer but, since it's a small company, I've ended up managing other engineers and performing various other tasks (working directly under the CEO). I'm expecting a promotion/salary increase at the end of the year and was wondering where I should set my expectations.

I currently make 125k along with some equity. So two questions:

1. How much is a fair salary bump?
2. More broadly, what salary range should I be looking at for a senior software engineer at a tech startup in NYC?