Google

No problem is too large to tackle. You get a chance to work on things not possible elsewhere because of the scale of the resources you have available. You also work with very smart and capable people.

You're given the opportunity to work on your own ideas, but you often find that someone else is working on exactly the same thing. It's hard to find an interesting piece of work that you can call your own.

Also, projects are getting more and more siloed into the different offices, so you will only be able to work on specific projects.

Talk to your engineers more, and solicit their ideas. The company is becoming more and more top-down, with what we work on being dictated from above. Google used to be a much more bottom-up company, with engineers coming up with the ideas and deciding what to work on.