Well, no, not really (on the 'avoiding evening work' idea). If you have Maths each day (which you will) then the books have to be marked on Mon for Tues, Tues for Weds, and marked to be left on Weds eve at school to be used by the other part of the jobshare team. Same with English books, and any other subjects that you split between you or teach more than once a week.
Equally, you may plan your lessons on Thursday for the following week BUT the first lesson may not go as planned - you may need to add more material, go back to revise, ump ahead - so you re-write your plans and resources and interactive whiteboard stuff on Monday night for Tuesday and Wednesday's lessons. Same will probably happen on Tuesday evening, especially if you do joint planning with your jobshare partner, as you will need to work out how to adapt their part of the week to achieve what you planned given that your first part of the week will have changed things.
One of those evenings will have a staff meeting. On at least one other you will meet a parent or a colleague after school, or have a meeting (SEN / CAF / behavioural issues / training) etc so you will have to do your marking and prep at home because by the time the parent / colleague has left you have to pick your children up from childcare.
You will also need to put up displays (or prepare material for displays which a TA may put up, depending on school custom and practice). That can't be done at home, and you can't have access to the classroom while your jobshare partner is teaching in it. So you do it after school on one of 'your' days, again meaning that marking and prep gets done at home.
Teaching just isn't one of those jobs that you can structure 'work / non work' time as you describe. Some stuff just has to be done before the pupils walk in the next day, even if that means that you have to work at night rather than saying 'ah, no, I can't look at that until my next day at home'....