Pros
Coming from a Ph.D. background, what drew me to Celect was the chance to, on the one hand, work with some of the most brilliant minds from academia (cofounders are professors from MIT), and on the other hand, apply the newest research to solve difficult real-world problems in retail. There is a strong culture of science-driven engineering here, and plenty of room to explore, but there is also a chance to deliver visible impact to the world's best known stores and brands almost immediately. It's the best of both worlds. It's also a fun place to work and while work is busy, the atmosphere makes it not so stressful.
Cons
Being a startup, there is less existing structure to guide things along. On the other hand, there is plenty of room to build that structure both in technology and company culture. There are also experienced people here from many backgrounds and I learn something from them every day.