Hi,

Day care: I'm not familiar with doggy daycare during working hours, but you should be able to find a dog walker quite easily once you're here.
On this link (click the pdf) you'll find a list of registered dog walkers, but it seems to date back to 2018...
https://www.ge.ch/document/liste-promeneurs-chiens-autorises

You may also find non-official dog walkers, but make sure they have good references and are experienced with dogs.
Some dog walkers come to your place and walk the dogs 2-3x per day, some others, more professional, pick up your dog and bring him somewhere else in a doggy daycare place.

Overnight care: you'll find professional kennels in Geneva and around charging from 25.- to ... 115.-/day (!), depending on the style of kennel (boxes vs. like at home). When I don't find any other solution with friends/housesitters for my own dog, I leave her at Stillwagon.ch (boxes style). You'll find also some people who host dogs in their house (rates from 25.- to 40.-/day).

Dog tax: you'll be delighted to hear that in Switzerland dog owner must pay a yearly tax. In canton Geneva, it ranges from 50.- to 100.-/year depending on your commune (+ 5.- secondary tax + 0.- to 20.- fees depending on your commune). If you have more than one dog, it ranges from 70.- to 200.- per additional dog.

Seasonal: in canton Geneva, from April to mid-July, you must keep your dog on the lead in woodland areas.

Breed: some breeds are prohibited in Geneva and in some other cantons. If you have an "attack dog" breed (pit bull, am'staff, cane corso, etc.), you better check prior to moving to CH.

Ears and tail: cut ears and cut tails are prohibited in Switzerland; I guess there are exceptions when you move to CH with your own grown up dog; better check first.

See also you PM for extra info