How does this require a whole team? Unless you're working at a hyperscaler

Not a hyperscaler, but we’re multi-cloud and probably one to two steps down.

My team’s service implements a number of performance and functionality improvements on top of your typical registry to support the company’s needs.

I can’t say much more than that sadly.

Please describe their system for us, including system throughput, the hardware they're on, networking constraints, and how many people are allowed to be needed to operate it.

Maybe they work for docker