s/he probably isn't bedridden, just needs that position in order to be in front of a screen 8+ hours per day.
I've got neck problems and a similar situation. I can sit at a normal desk bolt-upright for a few hours, but not a whole day. For long coding stretches I don't lie down but rather use a weird custom chair I built myself that has my back at about a 45-degree angle to the ground. My leg-torso angle is still 90 degrees, but (important part) the angle between my torso and jaw is much much less than 90 degrees. It requires a somewhat elaborate monitor arrangement (I like huge 4k screens) based on a repurposed adjustable-height standing desk.
I can't imagine this setup working in one of those now-ubiquitous "open office plan" places.
I've got neck problems and a similar situation. I can sit at a normal desk bolt-upright for a few hours, but not a whole day. For long coding stretches I don't lie down but rather use a weird custom chair I built myself that has my back at about a 45-degree angle to the ground. My leg-torso angle is still 90 degrees, but (important part) the angle between my torso and jaw is much much less than 90 degrees. It requires a somewhat elaborate monitor arrangement (I like huge 4k screens) based on a repurposed adjustable-height standing desk.
I can't imagine this setup working in one of those now-ubiquitous "open office plan" places.