Pros: Is working on nice concepts.

Cons: No job security if the company goes for downsizing.

Pros: First and foremost, they respect employees here, and everyone is friendly and helpful. That sounds like a cliché to a large extent, but having worked at numerous places where I might have wished for such clichés, it's nice to actually have it in practice. The best part about the place really is the people - they take great pains to ensure they hire for not only competence but cultural fit as well. Now, having helped in that process as well as having been through it, I can see how rigorous they are in applying their standards. The work itself is challenging (and there's plenty of it), but work/life balance is well maintained. Compensation and benefits are comparable with other companies in the geography and vertical, and have even recently improved, at least in the UK. They have, and mean in practice, an open communication policy, and are serious about getting things done for customers to improve and secure their move to the cloud. (I've emailed the CEO freely, received excellent replies, and no one minded, not the least of which was the CEO.)

Cons: It's a bit of a learning curve to get your head around the different technologies in play. You will need to read a lot to get up to speed quickly. Their new hire training is effective, and there are online certifications, but it does feel like drinking from a firehose at the start.

Pros: I have been working at Zscaler for almost 3 years, as an engineer, in the San Jose headquarters. Therefore, I can only speak to my experiences regarding the engineering side of the company. This is an excellent place to work. The engineering teams are incredibly dedicated and tight-knit. People here work very hard, but more in the sense of wanting to do a great job and not letting your colleagues down, rather than because your boss is breathing down your neck. There is an intense focus on doing what you have to do to keep our customers happy. They treat you as an adult here. You can have flexibility as far as "face time hours" in the office if you need it, but of course you are expected to get your work done regardless and behave responsibly. This place is not for everyone. If you're not that dedicated to your job, it's not for you. If your attitude is "I work hard from 9am-6pm, but after that I shut it down and make it difficult for anyone to reach me," this place is not for you either. But if you have the passion and the dedication, and enjoy working with like-minded engineers in a (mostly) bureaucracy-free environment, I strongly recommend this company. Also, it's not all work and no play here. There are plenty of celebrations and fun events (on-site and off-site), formal and informal gatherings in the break areas, once-a-week free lunches, endless free snacks and drinks, etc. I think it's the right balance.

Cons: I have heard that the pay is just average for the Valley. But I cannot personally vouch for this, as I'm satisfied with my salary (no idea if I'm average or below-average) and don't know what others make either.