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

UserWise Services; United States; Remote; USD 100,000 - 180,000; Full time

Benefits offered by this job

Market competitive USD salaries

Paid Time Off

Performance Bonus

Annual Performance Reviews

Job summary

UserWise Services is seeking engineers to improve and scale a live mobile game built with Objective-C and Cocos. You will help evolve the product for growth, making smart technical decisions and leveraging AI-assisted workflows to accelerate development.

The role focuses on maintaining a legacy codebase, optimizing performance, and shipping improvements in a live-service environment with close collaboration across product, design, and analytics.

Qualifications

• Experience with Objective-C and iOS development.
• Hands-on experience with Cocos (Cocos2d-x or similar).
• Experience in live mobile games or shipped apps.
• Ability to navigate and improve legacy codebases.
• Strong performance optimization knowledge for CPU, memory, rendering.
• Pragmatic mindset balancing refactor and shipping.
• Comfortable using AI tools in workflow.

Responsibilities

• Maintain and evolve legacy Objective-C + Cocos codebase.
• Optimize performance, memory usage, and runtime behavior on mobile.
• Refactor and modernize systems without disrupting live operations.
• Ship features and improvements in a live-service environment.
• Use AI-assisted workflows to speed development, debugging, and testing.
• Collaborate with product, design, and analytics to drive impact.
• Identify quick wins vs. deep tech improvements and prioritize.

Skills

Objective-C

iOS development

Cocos (Cocos2d-x)

Live mobile games

Legacy codebase improvement

Performance optimization

Refactor vs ship mindset

AI tools in workflow

Tools

Cocos2d-x

AI-assisted tools (Copilot, ChatGPT)

Job 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 enjoyreviving, 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 alive product with real users


• Making smart, high-leverage technical decisions


• UsingAI tools to accelerate development, debugging, and refactoring

Why This Role Is Interesting

• Work on agame that already has traction and players


• See your impact immediately in a live environment


• UseAI as a force multiplier, not just a buzzword


• Solve real engineering problems—not just greenfield abstractions

Who This Is For

• Engineers who enjoyfixing, improving, and evolving real products


• People who likehigh ownership and fast execution


• Builders who preferimpact over perfection

What You’ll Do

• Maintain and extend alegacy 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 alive-service environment


• UseAI-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 withObjective-C and iOS development


• Hands-on experience withCocos (Cocos2d-x or similar)


• Experience working onlive mobile games or shipped apps


• Ability to navigate and improvelegacy codebases


• Strong understanding of performance optimization (CPU, memory, rendering)


• Pragmatic mindset: you know when to refactor vs. ship


• Comfortable leveragingAI 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