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Senior JavaScript Game Engine Developer


At Arkadium our purpose is to have fun while creating fun - and that’s exactly what we’ve been doing for 20 years.

We’re the creators behind the world’s most-played games. From the Solitaire that came on your Windows machine, to hundreds of other games you’ve come to know and love - you can find our games on, iOS, Android, and lots of other big sites worldwide.

As a proud Evergreen business our values of Fierce Drive, Positive Energy and Living Full Lives are the driving force behind how we run and the choices we make.

We’re privately held (aka stable and reasonable about growth), founder-led (aka passionate about our craft) and we consistently rank as a “Best Place to Work” (aka not your typical games company).

Interested in becoming an Arkadian? We’d love to hear from you.


Arkadium is seeking an exceptional and experienced software engineer to build the best HTML5 game engine to support the development of our award-winning games.

This role is open to candidates based in Portugal and hybrid with occasional in person events. Business hours are 9-18 WEST (UTC+1).


  • Work closely with our engine developers to maintain our internal JavaScript-based game engines.

  • Research new third-party tools, libraries, SDKs, and APIs to integrate to our engines.

  • Develop specialized technical knowledge to constantly improve our engines to be best-in-class.

  • Write documentation for engine features and provide technical support for external developers.

  • Be an expert on web technology standards and trends, and actively employ best practices to the codebase.

  • Architect and write scalable/modular code for long-term systems that will be used by multiple clients.


  • A bachelor’s degree in computer science

  • 5+ years of experience developing engines, games, or web applications

  • Experience with PixiJS or similar tech (e.g., Phaser, CreateJS, HTML5 canvas games)

  • Portfolio of published technical projects

  • Strong knowledge of HTML5, JavaScript/TypeScript, NodeJS, and other web-based technologies

  • Strong knowledge of programming fundamentals, game architecture, and math

  • Strong verbal and written communication skills, as role is expected to communicate with external developers

  • Major plus if strong working experience with one or more of the following: Three.js; React Native; Unity and C#; Mobile app development on Android and iOS; Multiplayer networking; Web accessibility; WebAssembly


  • Competitive compensation with structured performance and career development check-ins

  • Meaningful supplemental health insurance (medical, dental & vision plans)

  • Meal allowance

  • Additional budget for conferences you are interested in

  • Personal development budget to fuel your passions and desire to learn (Arkadians are taking classes in not only Excel and leadership, but also interior design and even swimming!)

  • Time off from Christmas Eve through New Year's Day so we can all enjoy the holidays

  • A unique culture of transparency, true teamwork and fun

  • Summer Fridays: 4 Fridays off throughout the Summer to have more fun in the sun

⚠️ When applying, it would be appreciated if you could specify that you found this job on This helps us in attracting more companies to post their vacancies here. Thank you!

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