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Senior Unity Engineer New

SecJTlisMVFb1

49,000 - 66,300 EUR

Spain

Spain

Programming

ASAP

07/05/2026

Mid-Senior Level

Permanent | Full Time

No

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.

Bonus Points:
  • 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



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