Work-life balance describes personal and situational priorities, a property of your needs and circumstances. It does not describe a property of a company.

Figure out what you need, specifically, to get to the work-life balance you want. With a child that may mean work from home, flexible schedule, good insurance, day care subsidies.

From my own experience as a parent working in the software field, I found that companies that employed many other parents in my age range helped. If no one else on your team has a family they may not sympathize with the demands on your time you face.