Senior Integration Engineer - HTML5 Games

Remote freelance or Amsterdam-based hybrid/on-site

Are you an experienced software engineer who enjoys making things work end to end, not only in code, but across teams, platforms, and partners? At CoolGames, we are looking for a Senior Integration Engineer to help own the technology and ways of working that bring our HTML5 games to platforms such as Netflix, Discord, Facebook, Microsoft, and more.

You will play a key role in how we integrate, release, and maintain games across multiple distribution channels. You will work hands-on with platform SDKs and shared integration libraries, helping our game teams ship a single codebase across platforms while meeting each partner's technical requirements.

About CoolGames

At CoolGames, we’re proud to be a leading international HTML5 game studio, working with some of the world’s biggest ‘Big Tech’ game platforms, such as Netflix, Discord, Facebook and Microsoft. We also work with famous games IP such as Battleship, Angry Birds and Monopoly.  

CoolGames is part of Keesing, the world’s largest Braintainment company. Keesing is a financially strong publisher of engaging sudokus, crosswords and many other puzzles & games with a presence in over 20 countries headquartered in The Netherlands. 

With the CoolGames HQ in Amsterdam, supported by our global remote teams, we offer market-competitive salaries, the chance to contribute to successful casual games that are played by millions and work directly with some of the biggest brands in the world. We believe in creativity, collaboration and delivering world-class gaming experiences, while giving you the choice to either join our Amsterdam studio or become part of our remote teams.

If you want to grow your career in a profitable, internationally recognized company, work closely with world-famous partners and be part of a highly professional international team - CoolGames is the right place for you.

About the role  

Are you ready to build the technical backbone that gets our games running reliably on some of the world's biggest platforms? In this role you work at the heart of the organization, where game teams, platform partners, and products come together. 

Using a lean, framework-free TypeScript codebase and our shared integration libraries, you help keep our games platform-agnostic while still building the platform-specific features that make each integration feel native. Things like notifications, badges, achievements, and save states. You contribute not only by shipping integrations, but by shaping the tools and abstractions the whole engineering team relies on.

Together with the rest of the team, you will share technical ownership of the systems and processes that bring our games to new and existing platforms. You will work closely with game teams, product and publishing colleagues, and external partners to deliver reliable integrations, smooth launches, and a consistent player experience.

Your responsibilities will include:

• Owning and evolving the shared integration technology that supports multi-platform deployment and keeps our games largely platform-agnostic.
• Extending and refining our platform abstraction libraries to support new platforms, SDK features, and deployment requirements.
• Integrating and maintaining third-party SDKs for services such as authentication, payments, analytics, advertising, and platform features.
• Bringing games to new platforms, from technical discovery and planning through implementation, debugging, launch, and ongoing support.
• Translating platform documentation and partner requirements into clear technical solutions and reusable capabilities.
• Coordinating with internal developers and external teams to align requirements, priorities, dependencies, and delivery timelines.
• Reviewing and improving code to ensure quality, consistency, and maintainability across integrations.
• Investigating complex integration issues methodically and resolving their root causes.
• Profiling game and integration performance and implementing improvements where needed.
• Keeping SDKs and integration-related components up to date, compliant, secure, and stable.
• Supporting cross-functional teams with technical expertise during planning, implementation, and rollout.
• Staying informed about relevant developments in platform integration, game publishing, and web technology.

Requirements

About you

You like to troubleshoot technical problems and try to solve the root cause. You are proactive and used to taking ownership and responsibility. You see yourself as a good team player and are ready to take the lead on initiatives.

• Several years of professional software development experience. Games experience is a plus but not required, strong generalist engineers are welcome.
• Strong, hands-on TypeScript skills, comfortable working without a framework (no React/Vue/Angular crutch) and with a solid understanding of browsers and modern web fundamentals.
• Experience designing or maintaining reusable libraries and abstractions that are used by multiple products or teams.
• A methodical approach to debugging complex problems and resolving their root causes.
• Familiarity with performance profiling and techniques for optimizing browser-based applications or web games.
• The ability to use AI-assisted development to materially improve productivity without compromising quality. You understand, review, test, and remain accountable for generated output.
• Clear communication skills and the ability to align with product managers, game developers, and external platform partners.
• A proactive mindset and the ability to independently manage work, surface risks early, and keep stakeholders informed.
• An interest in casual games and the technology that gets them in front of players.

Benefits

What we can offer you

• An international team of 50+ professionals from almost 20 different countries;

• Work closely with some of the biggest (upcoming) game platforms in the world on high-quality casual games that are played by millions of gamers;  

• Competitive remuneration;

• A flexible remote or hybrid/on-site working environment;

• Remote for outside Netherlands 

• Hybrid/on-site for people residing in the Netherlands  

• A very open, informal and international company culture where everyone can make a difference.

Several years of professional software development experience. Strong, hands-on TypeScript skills, comfortable working without a framework (no React/Vue/Angular crutch) and with a solid understanding of browsers and modern web fundamentals. Experience designing or maintaining reusable libraries and abstractions that are used by multiple products or teams. A methodical approach to debugging complex problems and resolving their root causes. Familiarity with performance profiling and techniques for optimizing browser-based applications or web games. The ability to use AI-assisted development to materially improve productivity without compromising quality. Clear communication skills and the ability to align with product managers, game developers, and external platform partners. A proactive mindset and the ability to independently manage work, surface risks early, and keep stakeholders informed. An interest in casual games and the technology that gets them in front of players.