Start with the obvious:
Yes, technical ability. Assessing the fit of any web developer starts with determining if their technical expertise matches your project needs.
Technical exams and verified years of experience is the most straightforward way to be sure a web developer can tackle your project...however, hosting technical exams for candidates can be a heavy lift if you’re handling the hiring process on your own.
At Gun.io, you’ll only see web developers who have already passed our rigorous technical exams.