Let's throw you into a high stress environment give you data you've never worked with before and on top of that, just for funzies throw some namespaced SOAP at you. Oh and here's the WSDL, we want you to use that too, no parsing it on your own by hand.

A lot of people don't parse XML as much anymore. Most API providers have moved over serving up JSON and pretty much ask developers to only use that API.

Also this company fucked up. So you can't provide access to an API, but here read this RSS feed instead of something like serving up a static JSON file from a server somewhere.

As for the regex there's shipping, and there's doing it right. For all we know, they had to have it done before the 2 hours were up so they cut corners and got it done within the time requirement.