Senior Unity Engineer

Senior Engineer
Location: Barcelona, Spain – Hybrid
Relocation available, but not visa sponsorship.

We’re looking for a Senior Engineer to design, build, and scale the backend systems that power a major live mobile title. You’ll work closely with feature teams, designers, and client engineers to implement new game features, develop networked communications, and ensure server-side performance at scale. You’ll also create internal tools that support live operations and game design, write high-quality automated tests, and help maintain a secure, stable, and efficient gameplay experience across millions of players.

What You Will Do:

• Working closely with feature owners, the game design team and other development teams to implement new features within a feature team
• Work with game client developers to implement networked communications between game client and server
• Design and develop our game server and associated tools and libraries, with a focus on performance, scalability and consistency
• Write automated, high-quality tests (unit, integration etc.) and work with QA teams to improve gameplay experience, curtail exploits and ensure that everything works smoothly
• Implement tools to empower our liveops and game design teams in the creation of new and exciting game-play experiences 

What We're Looking For:

• 5+ years as part of a professional game development team or other relevant area
• Strong computer science and engineering fundamentals (data structures, concurrency, design patterns, algorithms)
• Mastery of Unity and  C# or another OO language, including experience with asynchronous and multi-threaded programming paradigms
• Hands-on experience with cloud computing (AWS, GCP...) and low-latency, high-scale distributed systems
• Knowledge of Unix-like operating systems
• Experience with Redis (or other database systems), ORMs and migration scripts
• Ability to write efficient low-latency, low-IO code
• Good understanding of how to prevent intrusions, injections, cheating etc.

• Familiar with highly available back-end systems and servers for games
• Web development on a modern framework such as React or Angular
• AWS, Docker, Terraform, Kibana, Chef, Ansible
• Experience with automated testing
• Experience with stateful and stateless game server architectures