# Senior Mobile Engineer (Objective-C / Cocos - Live Game Evolution)

**Company:** [UserWise Services](http://jobs.workable.com/companies/xnudHQAhPLna8DYoiomsgP.md)
**Location:** Remote
**Workplace:** remote
**Employment type:** Full-time
**Department:** Engineering

[Apply for this job](http://jobs.workable.com/view/dfee612e-9a03-4cbe-a654-36d5e2c814d1)

## Description

**About Us**  
At 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.  
We’re now looking for engineers who enjoy reviving, scaling, and modernizing high-adoption live games.  
  
**The Role**  
You’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

## Requirements

**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 (CPU, memory, rendering)
-   Pragmatic mindset: you know when to refactor vs. ship
-   Comfortable leveraging AI tools (e.g., Copilot, ChatGPT, etc.) as part of your workflow

  
  
**Nice to Have**  

-   Experience with C++ (common in Cocos-based systems)
-   Familiarity with game loops, rendering pipelines, and animation systems
-   Experience migrating legacy systems to modern architectures
-   Exposure to analytics-driven development (A/B testing, live ops)

## Benefits

-   Market competitive, tax-free USD salaries
-   Paid Time Off
-   Performance Bonus
-   Annual Performance Reviews