They love to bleat on about their Chaos Monkey this and Chaos Monkey that. But come on, they wrote a read-only cloud-hosted and distributed video streaming service that leans on standard cloud services and best practices for 90% of the hard parts. Chaos Monkey just smacks of writing a integration test for a third party component you don't own.
Frankly I wouldn't want a job at Netflix simply because the problem domain is not interesting enough. Read-only highly-resilient distributed systems are not particularly hard to create and test. It's only becomes an interesting problem when you need to do a comparable amount of write-ops at the same time as those read-ops.