Pros: Flexible working hours. Lesser work stress. Steep learning curve at the beginning, which helps you adapt and learn more. Mentors and managers are supportive.

Cons: Small office with fewer amenities, though it's going to change soon :)

Pros: By far, the most advanced and amazing software architecture and internal tools I've ever seen. Great culture, little management overhead, and a ton of really, really smart people. Lots of flexibility in changing projects, lots of opportunities for learning: * SDN * Linux kernel * Switching ASICs * Networking protocols * Internal tools You name it. A total "engineering culture" (mottos "do the right thing" and "quality is more important than time to market" are not lip service here). If you like developing software, you'll really love it. (There's even a SW development office in San Francisco.)

Cons: Initial learning curves are longer than usual, but you eventually get there.

Pros: This place is so much fun that time just passes by. All you remember at the end of the day, week, month, and year is the awesomeness you witnessed and delivered. Well-paced! No boring meetings. Emphasis is on quality of work, not superficial gloss. Best of the industry engineers are around to keep one highly motivated and inspired. You need not work to please some particular person. The performance review process keeps the engineer at the focal point. You can do all the good work and be sure that it will pay off. No borders of team, technology, etc. One can change roles and work in different technologies. Engineers spend time on actual engineering. Auxiliary stuff, workflow tools, etc., play their role perfectly with a combined objective of helping the engineer. Great tools written by smart engineers: the users themselves who know what they need from those tools. No micromanagement; engineers are trusted with their responsibilities. An open communication channel is maintained between management and engineers to improve work conditions, eliminate any hurdles, etc. Good work is duly recognized. Salary/hikes are not an issue.

Cons: Internal documentation needs to be centralized and improved.