Pros
Amazing people - absolutely brilliant coworkers, variety of technology stacks and projects, lots of management support (at least at the project level), pretty good benefits. ThoughtWorks has the best coworkers I've ever even imagined. Every single person I meet who works for TW I end up liking. One of the things TW does BEST is selectively hire for both talent and personality. You can immediately trust your coworkers, more than just for technical competence, but also for their good personalities, willingness to help out when needed, go the extra mile, be generally nice and civilized people, etc. Lots of fun to be had while traveling, provided you don't have anyone waiting at home for you (this job can rapidly destroy a romantic relationship) - drinks on the house, lots of people to hang out with, eat dinner out all the time, etc. You also have loads of support for technical learning, and the benefit of being able to ask some very, very smart people for help.
Cons
Pay is a healthy notch below the market rate; terrible work-life balance; traveling all of the time is miserable; ethically, rather full of themselves and hypocritical. A lot gets made at ThoughtWorks about the "pillar three" (social and economic justice) values of the company, and a lot gets talked about it. I don't see so much actually being DONE about it. Some of our biggest clients border on the downright bad (child labor, invasion of privacy, etc), and almost all of them are "just business", ie we're there in mediocre technology stacks simply to make money. Also, there is not much "pillar two" or technologically cutting-edge stuff happening, at least in the US. Lots of making money though, so it is not a place I would be worried about going out of business. And it's not a bad place to work at all - just gets tiring hearing this self-congratulatory back-patting all of the time about how ethical we are when we work for like, retail and auto industries. Come on. These are kind of... reactions to the ideologues within TW. At a practical level, there are 2 things that make it very difficult. 1) Pay. While not bad (nobody making a living as a developer is getting paid "badly" at the moment), it's not competitive, and it can be frustrating to go on job sites and see less-talented-than-you developers making 50% more a year in cases. It's demoralizing. It's also tough to be approached for less-fun-and-interesting jobs but jobs that pay in some cases 50% more a year almost weekly without starting to wonder if you're being a fool for turning down serious amounts of money. 2) Travel. This is really the big one for me. Traveling every week is pure misery. Even if you're lucky enough to have shorter flights, you will inevitably end up with delays, waiting in long airport security lines, and spending 3 or 4 or 5 nights a week - every week - away from your loved ones and your home. If you can stay with your parents and have no significant other and just save money and enjoy the travel, this is no problem. Once you're in a relationship, you'll find your husband or wife (or fiance or whatever) will eventually get tired of you being away most of the time. Also you will grow to vehemently despise the American traveling public and become a bitter, jaded, cynical, angry person any time you are forced to step into the miserable places called "airports" (I had stronger words but apparently they were too profane for glassdoor.com). Seriously. I am being sort of funny, but I can't find words strong enough to describe my hatred of air travel. And it started off being fun! I was excited, then I got status, got upgrades.... now it is just tedium and unpleasantness.
