Pros
*Good work/problem at hand.. with new techonolgies application and getting hands on experience at will. *Nice colleagues (Except two CEO's) *Flexible tasks if you can switch between back-end and front-end *HR is too good in luring people and every month people join and some get fired too. so be aware!
Cons
*CEO's just want to make big without caring about employees who work full time and have no percentage share as usual startup's. *One of the CEO is micromanaager and just knows how to fire people or move their seats. He is good in business investor meeting but owning a company and managing people: thats a joke! ))). Other remains in background with feedback from former. *Too many people leaving every now and then makes you de-motivated. I have seen 2 and half years with so many talented people leaving. Fortunately I stayed with good negotiating skills. *No frills at work although being a startup: no GYM, Food is extremely bad with cooks at CEO's mercy. No team events and coffee machine is second hand bought. :( *Bring your own screen or you are at default for not working. (forget macs or laptops even). *If you are a freelancer, you might see a surprise in no check-payment for you if product didn't work out!