Freelancer marketplaces tend to be targeted at non-technical people hiring freelancers. Instead, I want to be able to see who has used specific tools I'll need and how they've used them.<p>Otechie indexes freelancers on Github based off of the contents of their public repos manifest files (currently only package.json). Besides other languages, I plan to add the ability to search for developers who have used services such as Circleci, Heroku, or Docker.
How are you retrieving this data? I wonder if it would be against the TOS of GitHub to clone public repositories in bulk and analyze them. I also believe that GDPR makes a service like this impossible in the EU without consent of the people on GitHub.