@akdamar My schedule has changed a bit because my youngest just started kindergarten. But before he was in school all day, this is how my husband and I made things work:
My "working hours" were pretty much the same as my husband's, with one exception- he went to work about 2 hours before my toddler and I woke up (he usually started work at 5:30am). So, to keep things as fair as possible, when he came home from work, he had about 2 hours of rest and relaxation. He usually gave me about a 15-20 minute break when he first came home, so I could just decompress for a few. Then I'd let him veg out for about an hour and a half to two hours. Video games, reading, working on his project car, etc. Then we'd make dinner together, and the rest of the night was 50/50. If I needed to take a shower, then I wouldn't
ask him to watch our toddler. I'd just say, "Hey, I'm hopping in the shower, do you need in there before I do?" If our son wanted to play with something, I wouldn't ask my husband to play with him, he just did it. Sometimes we all played together, sometimes it was just kiddo and me, and sometimes it was just kiddo and Dad.
If my husband's schedule changed, we adapted. Sometimes he'd have to work swings, or 12 hour shifts, or through the weekend without a day off for 2 weeks. So we adjusted. Sometimes I was the only one caring for our toddler for 2 straight weeks. Usually when those schedules were over, I'd give him an entire day to rest and relax and not have to deal with responsibilities, and then he'd give me a day to do the same.
You have to communicate and be able to adapt when needed, but just because he works full time, doesn't mean he never has to be a parent.