Web game development service requires a team verse in web, game development, and in UI and UX design additionally. The most reliable way here is to delegate hiring a developer to a company that specializes in web game development. However, if you have decided to do it on your own, here are a few tips from our Recruiting managers.
Check out a portfolio. Former and current projects, their genres and used technologies, a candidate's role - everything is important here. Don't hesitate to request more information about particular projects, just to see if their expertise and approach match what you are looking for. As an add-on, ask to run a game for you - to see its performance and get an idea of candidate's skills in practice.