It is extremely mentally demanding to do both, even for someone with an overactive brain. I reached a point of severe burnout in 2025 and cut back to part-time work. I'll have to ramp up my hours again soon because, contrary to one of the other comments, I didn't get rich during 1990s/2000s boom.

As for how I did it, I would wake up very early and put in a few hours of writing, then I would put in a full day's work at the office. After my first twelve years or so in the industry, coding was almost second nature and came quite easily. Also, I do much of my writing and programming in my head while I'm walking, running or biking. (I bike to work and back every day.) By the time I sit down to write or code, I already know what I'm going to write, so it's just a matter of getting it through the keyboard.

But yeah, do both for a few years and it really taxes your brain. In both novel writing and programming, you're carrying an entire world in your brain: the plot and characters are one world, the architecture of the software you're working on is another. By 2025, I truly, literally felt like I needed to be shipped off to a madhouse in the countryside. A hundred years ago, people used to call that "the rest cure for a nervous breakdown."

Anyway, cutting back to part-time work has been a huge help. Sanity restored.