Interesting question, yes I'm another engineer trans woman, hired by an big IT company as R&D researcher that learned programming in a venerable PDP-11 and using punched cards, and now working as researcher on photonic networks projects. wow. But now, when i meet face to face with other trans-sisters i discovered a wide set of sisters working on very different professional fields, hair stylists, waitress, automotion, carpenters, heavy industry welders, a deputy of the government of Madrid, journalists and others sadly unemployed, but the percentage on IT people continues high.
I don't know the reason, but i think this is related to two phenomenon.
1: The network is young and it was dominated by engineers until few years ago, before the internet explosive grow opened it to the rest of population.
2: Technological work requires a wide open mind and a lot of logic, your main tool is your mind, so people tends to be more opened to differences.
Kisses
Amanda