I'll be 35 next year and started writing code when I was 30. I have very similar experience. This year, I focused on how to write better code instead of designing and building. I'm slowly getting better this year. My biggest code base for one of my prototype was around 25k LOC. I mainly wrote iOS app, too. I spent more than one year to take care of my kids so there was a long gap. And it has been difficult for me to find a job. There are always meaningful ideas and having the ability to bring some of them to life is my biggest motivation.