Add Job Descriptions (from Basecamp)

This rings a little hollow. I'm not sure what "advanced agile software development methodologies" are, if I use them, or how I would go about getting better at them. Everything else here seems pretty actionable. What are the advanced methodologies we want people to use? 

How about something like: "Rapidly deliver high quality software by focusing on minimum viable products, iterating in small steps, and adjusting based on feedback." or something like that that tells a developer what this actually means.