At the moment I am a student at the University of Helsinki. I work in the lab from 9 to 3, but usually I can leave early. Hence, my most availibility is after 4 pm during the week day and free during weekend, execept Sunday when I need to go to the church at 5 pm. You can count on me for feeding, playing, and walking your pets for 30 mins to an hour per visit. I have experience with cats, dogs, fishes, pigeons, bunnies, and hamster, but the unique one is fine as long as you trust me. I am available for 24 h stay during Saturday and half day on Sunday. 

Back then, I took care of my cat back then when I was still in my home town. And fortunately he is an independent cat so everyday I just needed to refill his food bowl, changed the drinking water, and cleaned the litter box.  Actually, I took care of his mom also. It is hard to believe that the mom was coming to my home out of nowhere, giving birth to him and disappeared some months after. The experience of taking care a kitten until it grew was intense. Apart from that, I used to take care of my friend's British short hair cat in my home town because she is a flight attendant with heavy flight schedule. Most of them were shy, so I let them got close to me when they wanted to. Otherwise, I some times played with them with a ball. 
Besides that, I once lived for a week in my friend's house who own 2 huge dogs. I spent my week to walk the dog once a day in the afternoon around 5 pm. On the first 3 days, it was quite a challenge because one of the dogs were so active but afterwards, I could follow the pace. 
For your pet, I need to know the particular habit or your pet needs. I understand that some are shy, some are playful, some are so welcome to strangers, and some are kind of aggressive. So these details help me so much to prepare how to approach your pet. I anticipated the energetic one, especially during the walk. I can handle the dog to occasionally pull and loose the leash to control the dog's pace. In addition, wisely choose a calm route to avoid the encounter with aggressive neighboar's dog or if it preffereable avoiding the big road with cars.