About UsAt UserWise Services, we build and scale mobile games played by millions worldwide. Our focus is simple: move fast, deliver impact, and use modern tools—including AI-assisted workflows—to accelerate development and iteration.
Por favor, lea detenidamente la información de esta oferta de empleo para entender exactamente qué se espera de los posibles candidatos.
The RoleYou'll work on a proven, high-performing mobile game built with Objective-C and Cocos, helping evolve it for the next stage of growth. This is not a "build from scratch" role—it's about:
- Improving a live product with real users
- Making smart, high-leverage technical decisions
- Using AI tools to accelerate development, debugging, and refactoring
Why This Role Is Interesting
- Work on a game that already has traction and players
- See your impact immediately in a live environment
- Use AI as a force multiplier, not just a buzzword
- Solve real engineering problems—not just greenfield abstractions
Who This Is For
- Engineers who enjoy fixing, improving, and evolving real products
- People who like high ownership and fast execution
- Builders who prefer impact over perfection
What You'll Do
- Maintain and extend a legacy Objective-C + Cocos codebase
- Optimize performance, memory usage, and runtime behavior for mobile
- Refactor and modernize systems without breaking live operations
- Ship features, events, and improvements in a live-service environment
- Use AI-assisted workflows (code generation, debugging, refactoring, test creation) to move faster
- Collaborate closely with product, design, and analytics to drive impact
- Identify quick wins vs. deep tech improvements and prioritize accordingly
What We're Looking For
- Strong experience with Objective-C and iOS development
- Hands-on experience with Cocos (Cocos2d-x or similar)
- Experience working on live mobile games or shipped apps
- Ability to navigate and improve legacy codebases
- Strong understanding of performance optimization
📌 Senior Mobile Engineer (España)
🏢 UserWise
📍 España
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