Yahoo

Great benefits.

There are lots of great engineers working at Yahoo! You can contribute to some open-source projects.

There is some collaboration between teams, but not much. The free food is very good.

The worst part of Yahoo is the constant layoffs. This month they fired some good developers for no reason, and people don't even get a notice before being fired.

Every week, there are at least 30 new hires. New people take time to get up to speed, and when they do, they could be fired without even knowing why.

Many times, there are goals that conflict with each other. The management itself is very bad.

Stop firing good people, give constant feedback, and help the team deliver their goals.