1. Uber owns their engineers
2. Snapchat is trespassing on some kind of "territory" and attempting to "steal" Uber's property
3. The engineers involved are like fish or game, simply being taken away by someone else
If someone chooses to go to work for another company, they aren't being "poached". They're informed participants in a business transaction, not to mention a major life event. They are voluntarily severing one business arrangement and entering into another one. This whole idea that when you go to work for a company, you turn in to some pheasant owned by the property's lord should be revolting to anyone who's worked hard on their career and their professional development.
Just stick with the word "recruit." Leave out "poach" and its negative and demeaning connotations.
EDIT: Typo