[infomofo]

I think there are a few considerations based on the type of role. If you're expected to interact with clients, then I think a full suit for an interview is appropriate, basically to demonstrate that you can present yourself in a business environment if necessary.

If the role is purely for programming, and your impression is that the other developers at this company do not wear them, I would not wear a tie and jacket- it could come off as an incorrect cultural fit.

I don't think you'll feel overdressed in any work environment if you wear a button up shirt, comfortable slacks, and understated dress shoes.