Senior Software Engineer (Full Stack | React Native Expert)

About the role

Lumida is seeking a senior full-stack engineer with deep React Native expertise to shape the mobile experience of its AI-native wealth advisory platform. The role combines mobile performance engineering with backend API design to deliver a seamless, high-performance app for sophisticated investors.

Key responsibilities

• Lead the architecture of the React Native ecosystem, implementing offline-first patterns, state persistence, and real-time synchronization.
• Design and optimise Python (FastAPI/Django) backend services to provide mobile-efficient APIs, minimal payloads, and WebSocket integration.
• Own performance engineering by identifying render bottlenecks, memory leaks, and bridge traffic to maintain 60 FPS animations.
• Establish code governance through strict linting, TypeScript conventions, and automated testing (Detox/Jest).
• Integrate agentic AI features into mobile interfaces, ensuring responsive data-science visualisations on small screens.
• Oversee or implement native modules in Swift or Kotlin when JavaScript performance limits are reached.

Required profile

• 5–10 years of professional software engineering experience.
• Delivered at least one high-traffic, complex React Native application from inception to production.
• Mobile-first mindset focused on battery life, background tasks, and atomic state updates.
• Strong emphasis on reliability, type safety, and maintainable code.

Required skills

• React Native
• Python
• FastAPI
• Django
• TypeScript
• Detox
• Jest
• Swift
• Kotlin
• WebSocket