[liquidpele]

If you don't already know how to code, then it wouldn't be easy. Development isn't just another kind of job you can get trained for (unless you make very little and do things that would get outsourced). It's a skill that takes time and experience to grow into. That said, it's never "too late" for anything in life, if you find it interesting then try contributing to various github projects or even start your own.

[ghaff]

I think software development is probably relatively easier to slide into than deciding you really want to become a mechanical or chemical engineer. As you say, it's something you can potentially do a bit on the side.

That said, per another comment, as long as the pay is ridiculously good--which odds are it won't actually be by starting over with a tech company--waiting it out and avoiding lifestyle inflation isn't the worst plan. One of my classmates in school retired from investment banking in his 40s and travels and teaches a bit on the side.