Microsoft

In the right team, you'll work with great people and learn all the time. Microsoft is involved in a huge number of different products and roles, and mobility within the company is normally fairly easy.

It can actually be a great place to learn new skills. After you've built a track record of success, people will give you a try at things you probably wouldn't have been hired into directly.

In the wrong team, you'll work against great people and make each other dumber. Don't expect your management to help you find a good fit; it just isn't something the company is good at. You need to manage your own career.

Keep shopping yourself around. Don't get stale.