Just wanted to put out a followup to this post. My job has shifted a bit, to where I am still somewhat stressed, but its a pretty even burn, not sudden spikes. This isn't ideal, but it is better.
I loosened up a bit, and bought a fun car (Abarth), the most expensive vehicle I've ever bought. It does make the commute a lot nicer, though.
I am trying to eat better and exercise, but its a lot of steps forward and backward. Once I clear a few projects, I should be a little less pressed for time at home, and have more time to cook healthy dinners. My caffeine addiction is still an issue, though.
I am planning on trying to hold out for at least 5 more years, possibly more. Did some calculations, and barring serious complications, at 5 years from now (age 43), I should have enough saved for retirement that I can switch into something that pays the bills, not have to contribute more to retirement funds, and still retire at about age 65. Doubling down, and working ten more years (to age 48) in this job/field should allow me to fully retire between age 55-60.
Regardless, I am still trying to come up with an employment (or self-employment) niche that I could fit into, but will probably be relunctant to jump ship for the next 5 years, unless something too good to be true comes up.
Thanks again to everyone for their comments and advice.
A note to young enginerds: I did not save much of what I made in my early 20's. If you are concerned about job burn-out, and can manage to do so, I encourage you load up your retirement funds as much as possible. It has the potential to give you a lot more control over your life a lot sooner.