A spectator shoe uses contrasting colours or materials across sections of the upper, often at the toe and heel.
A shoemaker might use a darker leather around the toe and heel and a lighter material for the body of the shoe. A spectator can also contrast smooth leather with another texture. The pattern of perforations on a brogue is a separate detail from that arrangement of panels. When describing a pair, it helps to name the colours and materials actually used, then describe the broguing or lacing if either is relevant to the customer.
In job listings
The term is likely to come from a client or a collection rather than from a vacancy. In a footwear role, it helps to know that a spectator is defined by contrast between sections of the upper, not by the way it fastens. Search local jobs for “footwear”.