Does anybody else have back pain and tingling in fingers after a long day?

Back pain: check.
Tingling arms: check.

Welcome to this awesome place 😉

I have a pretty poor vision so add the neck pain, eye pain (I'm an albino so light hurts) and an headache some time

Visit an occupational therapist. Just saying.

The good news is that I got away with the constant pain and tongling by performing various stretches, but now It somehow becoming unbearable, and I hate to lose concentration due to that. We gotta think of a way to solve this for once

Nope. Get proper deak and chair. Remember to stand up often. Never ever use a mouse. Get a mousetrapper or something. I did. No problems since then