Pros
My overall experience at Adchemy has been very good so far. The hiring process was swift and smooth. I met with a good number of people, including the CEO. They were very friendly and excited about what Adchemy was doing. My hiring manager did a great job in addressing my concerns and gave candid answers to all of my questions and concerns. The offer was fairly competitive.
I am a member of the research group. It is a small sized dynamic team with some very smart folks from the top universities. It has been an excellent learning experience so far. I have had an opportunity to make some core contributions in the project I am working on, in a relatively short time. There is ample freedom to experiment with any idea and implementation for the problems I have been working on.
I have worked with a good number of people in research, engineering, and PM; I have made some good friends at work.
And yes, free lunch from Monday-Thursday, happy hour on Friday, table tennis, x-box, movie nights, etc. :)
Cons
Some senior employees left since I joined; we are not yet profitable (though we have good funding).