I spent a bunch of time writing about open source developers:

• Working in Public: The Making and Maintenance of Open Source Software (Stripe Press): How modern open source works and drawing parallels to the creator economy
• Roads and Bridges: The Unseen Labor Behind Our Digital Infrastructure: Open source code as a form of public infrastructure that requires maintenance
• Some of the repos you'll see here (lemonade-stand, awesome-maintainers, contributing-template, opensource.guide)
• More stuff, if you're into it