I serve on the evangelism team at Twilio. Technical writing is a big part of our job. We also spun up a Developer Education team last year which writes in-depth

I serve on the evangelism team at Twilio. Technical writing is a big part of our job. We also spun up a Developer Education team last year which writes in-depth tutorials and the docs. I think you may have been asking if it's possible to live off of freelance technical writing, in which case, I can't answer that based off of personal experience. But there absolutely are jobs out there that require a competent developer with exceptional communication and teaching ability.