I interviewed at a PE shop downtown and my shoes were burgundy cordovan
That's because they handle weather very well and keep my feet dry.
Here is a 10/10. A beautiful Macclesfield print from Sam Hober. The pattern connotes absolutely nothing but is still elegant. David (Hober) also makes these ties to order, so you can specify construction and length. I've never bought from him, and I'm not affiliated, but I've heard his quality is comparable to Charvet, Hermes, Simmonot-Godard, etc. I.e. stratospheric.
The suit is charcoal gray or navy blue. Some would say charcoal is your only option here. To anyone who mentions black: come on. Are you Justin Timberlake, an undertaker, or a waiter? Are you hitting the club right after the interview? Also, no pinstripes, no windowpanes, no chalkstripes, no plaids. You're not in a Ralph Lauren catalog, you're trying to convey why you'd be a good fit for company x without letting flashy clothing get in the way.
Shoes should be made of top grain calfskin. This means at a minimum, Allen Edmonds. The Park Avenue is your safest bet - a very traditional cap-toe, close-laced oxford. You can also try Alden or Brooks Bros' Peal line, which is made by Crockett and Jones or Alfred Sargent, both in the UK. I wouldn't do cordovan (cordovan is foremost a type of leather, not a color - the most common color that it is dyed is commonly called cordovan, though). The thing about cordovan is that when it is new, it can squeak, and it has a very characteristic waxy sheen to it. It's nice when well worn, but IMO makes a shoe more casual than calfskin, even though it is about 1.5x more expensive.
NO PIMP SHOES.
Save the sprezzatura for when you actually have the job.
Please don't tell people to wear black suits. In the United States, you will look like a waiter. Maybe that's different in Europe. In the US, you do not wear a black suit in the daytime, ever, unless you are a waiter or driver or doorman or undertaker...you get the idea.
You're on styleforum aren't you?