Pros
Get some programmatic exposure though you'll really have to struggle and fend for yourself which is somewhat comforting because everyone is in the same boat. I would say about 70% of the employees are just faking it until they make it. Just try and ask them a question and watch them stutter and reply we'll look into that for you.
Cons
You'll notice most have been around for less than a year which speaks to the high turnover rate. While most of these layoffs weren't of choice for me the frequency is worrying because it indicates a company that lacks direction. They tend to feed you a lot of BS about how PubMatic is so far above competitors like Appnexus, Rubicon and AdX. If you do research on your own YES programmatic is growing BUT there's not a lot of money in SSP. PubMatic is no longer just a premium publisher partner they have more lower tier accounts in reality and a handful of actual premium publishers. It's an everyday struggle with publishers who are working with AdX/Rubicon and are seeing much better results with those partner than with PubMatic. This sounds harsh but just do everyone a favor and either sell the company or go out of business already.