As for a real tip, since you mentioned software engineer specifically, I think you are using the keyboard a lot, so you obviously must've looked into voice/speech to text related stuff, but for the mouse usage, I can recommend those small form factor wireless/bluetooth keyboards with the touchpad portion in the top center, those are fairly easy to use even with the non dominant hand (or even with the fingertips if you can move those). I won't link here directly, but they look like small game controllers and are relatively cheap.

If you’re using an LLM as part of this, it was already faster at typing, so lean into that.