JavaScript Developer

By February 20, 2020Jobs

When the app-stores were introduced ten years ago, mobile quickly became the largest games platform. And now a new shift is taking place, as millions of people are starting to play and instantly share games with friends via their social or messaging apps, such as via Facebook, Messenger, LINE and WeChat.

CoolGames has been a front-runner in this new space and brought many successful games to messaging platforms, including Angry Birds, Battleship and Daily Sudoku, which is now the #1 sudoku game on Facebook.

Are you a JavaScript Developer and are you looking for a new challenge? Then CoolGames might just be your next stop! We are looking for an experienced JavaScript Developer specialised in working with multiple SDKs/APIs, with a passion for casual games, to strengthen our team. You will be working on various automation tools, the Google IMA SDK, debugging and helping us to drive further growth for our millions of players each month.

Your key responsibilities

  • Maintain and upgrade our existing platforms, game service APIs and SDKs
  • Work on developing advertisement integrations for our websites and our games catalog
  • Providing a smooth, stable and scalable cross-browser experience to our gamers
  • Work closely with the rest of the Technology team, Commercial/Advertising team and internal business stakeholders


  • At least 2 years of relevant experience with mobile/web-design and -development
  • Full proficiency in HTML5, CSS and JavaScript is required
  • Solid knowledge of RESTful APIs and JavaScript SDKs
  • Solid knowledge with automation tools like Jenkins
  • Experience working with client-side MVC frameworks is desirable

Your profile

  • Proactive and used to taking ownership and responsibility
  • Good team player and supportive to other departments
  • Excellent social, communication and presentation skills
  • Comfortable with agile development processes and tools


What we offer

  • A highly dynamic job with a competitive salary
  • Company pension plan and travel cost compensation
  • Optional company stock plan participation
  • Health care insurance compensation
  • Sports allowance
  • An attractive office location in the center of Amsterdam
  • An open, informal and international company culture
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