A doctor said she wouldn't recommend height-adjustable desks, but I don't know of any other position/way to write code that is easier on the back. Lying on a pillow on the bed usually reduces the pain, but it's harder to type things that way. I even thought about getting an iPad arm for my bed so that I can do my readings while resting on the bed, but I'm not sure if that's a good idea as it'd probably make the back muscles even weaker.
When I sit down, I also kind of switch it up. Desk chair, couch, high top chairs, and sometimes my bed so the angles don't get too familiar
The internet tells me:
Sciatica is pain going down the leg from the lower back. This pain may go down the back, outside, or front of the leg. Onset is often sudden following activities like heavy lifting, though gradual onset may also occur. The pain is often described as shooting. Typically, symptoms are only on one side of the body. Certain causes, however, may result in pain on both sides. Lower back pain is sometimes present.
https://en.m.wikipedia.org/wiki/Sciatica
I am guessing this means you mean you have low back pain.
In my experience, this is typically due to immune distress and is best alleviated by proper nutritional support for your bone marrow. And upping cleanliness of the area triggering it, so maybe clean your keyboard if it's disgusting (as a guess based on experience working at BigCo).
I don't think standing is the key, but changing positions regularly really helps with my back comfort.
For a while I was doing 20/8/2 and liked it. Sit for 20 minutes, stand for 8, walk for 2. Now I'm kind of doing sit and stand for 1h50m, then a brisk walk for 10min/0.5miles.
I made the experience that fasting for several days got rid of most pains. Continueing without industrial sugar (best advice ever given to me) and restrict other carbs kept away most problems of that kind.