The role involves maintaining and extending a legacy Objective-C + Cocos codebase, optimizing performance, and shipping features in a live-service mobile game environment. Engineers will use AI-assisted workflows and collaborate with cross-functional teams to enhance the game's impact.
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
Similar Jobs
Artificial Intelligence • Big Data • Cloud • Information Technology • Machine Learning • Software
Design and operate corporate security for a cloud-first SaaS company: identity-centric architecture (passwordless/Zero Trust), endpoint/infrastructure hardening, EDR/XDR tuning, Azure corporate security, SaaS integration and CASB/DLP, detection and incident response automation (Python/PowerShell, SOAR), vulnerability and audit support, and security training for business teams.
Top Skills:
AWSAzureCasbDlpEdrFido2/WebauthnIntuneJAMFMicrosoft Entra IdOidcOktaPowershellPythonSalesforceSAMLScimSIEMSoarTerraformXdr
Artificial Intelligence • Big Data • Cloud • Information Technology • Machine Learning • Software
Design, build, automate, and operate the company's cloud-native data infrastructure (ingest, processing, storage, serving). Provision scalable, resilient platforms (self-service), introduce new data stores, own DR and cross-region replication, monitor availability and performance (Datadog), and handle incidents and on-call duties while collaborating with product, architecture, and security teams.
Top Skills:
Amazon AuroraAmazon EksAmazon ElasticacheAmazon MskAWSClickhouseCrossplaneDatadogDockerFluxGithub ActionsGitopsGoKafkaKubernetesMongodb AtlasOpensearchOpentofuPythonRedisTerraform
Cloud • Information Technology • Security • Software • Cybersecurity
Manage a Spanish territory to acquire new logos and drive upsell in major enterprise accounts. Sell complex SaaS cloud security solutions, lead multi-stakeholder sales cycles, and collaborate with Sales Engineering, Solution Architecture, Value Consulting, and Transformation teams.
Top Skills:
AICloudSaaSZero TrustZscaler Zero Trust Exchange
What you need to know about the London Tech Scene
London isn't just a hub for established businesses; it's also a nursery for innovation. Boasting one of the most recognized fintech ecosystems in Europe, attracting billions in investments each year, London's success has made it a go-to destination for startups looking to make their mark. Top U.K. companies like Hoptin, Moneybox and Marshmallow have already made the city their base — yet fintech is just the beginning. From healthtech to renewable energy to cybersecurity and beyond, the city's startups are breaking new ground across a range of industries.
