I have more than ten years of HTML5 game development experience - I can consider myself a professional and one of the best experts in the field. If I'm not too busy managing my own projects, I might be available for hire. Here's what I can help you with:
Since 2013 I've worked with companies wanting to show their product, service, or recruit new eployees, and have confirmed success stories: Clay.io competition, Mozilla Firefox OS, AirConsole competition, Codility recruitment, Spartez recruitment, BLUR launch jam, Jscrambler app, Coil Web Monetization, Google GameSnacks portal, and many more.
I also have background in judging js13kGames entries yearly since 2012 and mentoring at Gamedev.js workshops over the years. If you want me to evaluate people's gamedev creations - I'm happy to help.
Plus years of experience writing series of articles and tutorials for MDN Web Docs (Device Orientation, Gamepad API, publishing games, 3D basics, PWAs), Smashing Magazine (CSS Selectors: Level 4), Tuts+ (Firefox OS, Phaser, js13kGames), Mozilla Hacks blog (Firefox OS TV, Progressive Web Games, MozFest Arcade, and many more) or participating in Google Season of Docs (GDevelop).
I'm running Gamedev.js meetups, workshops, and hackathons in Poland since 2012, and we had more than 40 events so far, including js13kGames Launch Parties. On top of that there are also cooperations with other companies like Mozilla's Developer Roadshow, SwingDev's WebVR meetup series (#1, #2, #3), Yggdrasil's meetup, W3C Games' report, and more.
I had so much fun staffing Mozilla's booths around the world: MWC in Barcelona, FOSDEM in Brussels, Front-Trends in Warsaw, BrazilJS in Porto Alegre, JSConf EU in Berlin, MozFest in London, GDC in San Francisco, and run workshops: BrazilJS in Porto Alegre (again), JS Kongress in Munich, JSCamp in Barcelona, numerous Gamedev.js workshops in Poland.
Still missing some options you're interested in? Reach out to me anyway! I'll be more than happy to advise about anything that's related to HTML5 game development.