Google

I was an intern at the Cambridge office and had a great time. Tons of perks, like free food, massage points, and an espresso bar, are available to help you be the best you can be at work.

The people are great and almost always assume the best of you. I never had bad interactions or felt the need to "prove myself". You can also feel that many people do actively care about doing the right thing, not just about making money or optimizing the heck out of things.

Because Google is so big, it is hard to feel that what you are working on has a huge impact. In reality, not a large proportion of the work being done is of the exciting, high-impact kind, although you could still be working on interesting, important problems.

Work on making job definitions loose enough so that employees feel empowered to find and tackle problems, ranging the gamut from pedestrian to high-impact.