I was a telecom and system developer for a lot of my career -- which I figure was ethically neutral.
I always avoided applying for jobs with companies in defence industries.
Now I work with software for medical device data in hospitals, which I'm glad of -- it seemed to me more worth-while than working in Fintech, which was another option at the time and better-paid.
If you are involved in IT and are Buddhist, how do you connect the two (other than through donating to Buddhist causes)?
Well I think it's a job, a bit like others, I mean it's not like teaching the Dhamma, or peace of mind.
But I feel no remorse about seeking medical care for family who need it, I think it's a right thing to do, and writing software which assists the medical profession isn't a bad thing either, I don't know better.
Since you ask, providing medical care may be just about the only "work" that the Buddha told monks to perform (for other monks, who have no other family), which I guess goes to show something.
Also when my wife was telling me what I should say at her funeral, she said, "First of all, I'd like to thank the doctors for saving my life." So there's an element of that for me -- gratitude, and paying it forward.