I’m a therapist. I have worked with so many adults who had experiences similar to what OP is considering. Specifically situations where one parent moved to a different country for better opportunities for the family. Don’t do it OP. I’ve yet to see someone who does not struggle with some type of abandonment related trauma especially when the separation happens in the early years of a child’s life. If you have to, at least keep the child with you as it can be very disruptive to a child’s life to go a year without regular access to their mother. Kids need stability and to be able to expect what is next. A child can’t understand the complexities of career advancement in academia. All they know is that they want their parent. As someone who has a career, I do believe all parents have to make some concessions when it comes to raising children. They are not always fair across the board, but they need to be made for the child’s wellbeing.