Lead/Senior Game Backend Programmer COSMIC LOUNGE / Oulu/Helsinki

PUBLISHED: June 19, 2024

Join us at Cosmic Lounge, a mobile free-to-play puzzle games startup based in Helsinki and Oulu. We’re on a mission to craft stellar free-to-play puzzle games with longevity at their core. Leveraging our unique proprietary AI-powered Puzzle Engine technology, we’re redefining the game development cycle, with highly accurate product market fit evaluation and significantly more efficient prototyping, development and live operations.

The Role:

We’re seeking a Lead/Senior Backend Programmer to play a crucial role in developing and maintaining the backend infrastructure that powers our mobile games. Your expertise will ensure our backend systems are robust, scalable, and optimized to deliver a seamless gaming experience, directly impacting player satisfaction.


  • Develop Server-Side Systems: Construct scalable server-side features and systems for gameplay, social functionalities, and more, ensuring dynamic and engaging games.

  • Performance Optimization: Lead the monitoring and enhancement of our backend infrastructure for scalability and reduced latency, ensuring a smooth player experience.

  • Data Management and Security: Design and implement secure, efficient databases for game data storage, applying rigorous security measures to protect against unauthorized access and ensure data protection compliance.

  • Collaboration: Work closely with game designers, frontend developers, and artists to align server-side systems with game design and user experience objectives.

  • Troubleshooting and Maintenance: Provide expert backend support to identify and resolve issues, maintaining optimal game performance and stability.

  • Continuous Learning: Stay updated on the latest server-side technologies and game development best practices to drive innovation in game performance and user experience.


  • Strong proficiency in server-side programming using C#.

  • Extensive experience with SQL and NoSQL database management systems and implementing secure data storage solutions.

  • Expertise in REST API design and implementation, and a solid understanding of network protocols.

  • Skilled in cloud computing, particularly Azure, including deployment, scaling, and management of cloud resources.

  • Fundamental knowledge of server security principles.

  • Proven track record in building and operating scalable live game backends.

  • Adeptness at developing player databases with session management, and experience with various identity providers.

  • Open to work in an environment exploring new technologies including AI.

  • Passion for games.


The following are considered as a plus:

  • Experience creating web dashboards for internal use, e.g., for live-ops management.

Why Join Cosmic Lounge?

  • Be part of a groundbreaking company that’s redefining mobile gaming with AI-powered technology.

  • Collaborate with passionate, experienced professionals in the gaming industry.

  • Impact the creation of captivating games that reach millions globally.

  • Enjoy a competitive salary, attractive stock options, and a comprehensive benefits package.

Join Us:

If you’re passionate about pushing the boundaries of mobile gaming and backend development, Cosmic Lounge is the perfect place for you. Let’s create the future of gaming together.

Please apply directly to careers(at)cosmicloungegames.com

PS. Unfortunately at the moment we cannot support with the relocation.