React Native Developer for Cloud-Native Mobile App Backend

LumenWorks

Contract · Remote · Flexible hours

About the role

LumenWorks is launching an integration project that links billing, CRM, and internal APIs into a seamless mobile experience. We need a React Native developer who can translate complex backend workflows into reliable cross‑platform features.

Key responsibilities

• Design and implement React Native modules that consume RESTful services from billing and CRM systems
• Synchronize data securely between iOS and Android clients and internal APIs
• Write unit and integration tests to ensure data integrity across endpoints
• Collaborate with backend engineers to define API contracts and error handling
• Optimize app performance and memory usage for smooth user interactions

Must-have skills

• Strong experience building production‑grade React Native apps
• Proficient in JavaScript ES6+ and mobile platform nuances
• Hands‑on knowledge of Android and iOS native modules
• Understanding of authentication flows and secure data storage

Nice to have

• Familiarity with GraphQL or gRPC integration
• Experience with CI/CD pipelines for mobile builds
• Background in fintech or CRM integrations