https://ideasfor.dev a simple newsletter/website for sharing my ideas with developers. It helps me learn how to manage a website and improve myself in writing alongside I've written this by Go, which I'm trying to improve my Go knowledge. I don't mind if I don't earn money from it, but I do my best.
I've been paid by Dzone.com (for both writing and editing) and TechBeacon. I was published a few times by Lifehacker although I don't remember if those were paid (and they aren't what I'd consider a tech site).
Reaching out to site editors with a couple samples of work could find you getting work published. As a freelance software developer, getting paid to write is nice, but just getting published can help increase exposure and lead to more incoming requests for project work and improved reputation.
https://github.com/smoqadam/musrv