Founding Mobile Engineer — End-to-End RN Native & Audio

Mozart AI; Greater London; On-site; GBP 90,000 - 120,000; Full time

Job summary

Mozart AI in London is seeking a senior mobile engineer to own the Mozart app end to end. You’ll lead architecture, RN/Expo app, native Swift and Kotlin where needed, and ship weekly with solid performance and a great UX.

You’ll optimize for background/offline, real-time collaboration, audio playback, and social features, balancing platform differences and backend contracts. 5+ years in mobile development required; in-person role.

Qualifications

• 5+ years of professional mobile development experience.
• Proven ability to own a large production React Native/Expo app.

Responsibilities

• Own the Mozart mobile app architecture, state management, and navigation.
• Make complex product experiences feel simple across music, video, and social features.
• Enable multiplayer, presence, and offline/online sync for mobile sessions.
• Build for background, offline, and energy-efficient performance on phones.
• Ensure high-quality audio playback with responsive controls and platform integrations.
• Ship updates rapidly with measurable release events and robust analytics.

Skills

React Native

Mobile architecture

State management

Performance profiling

Cross-platform mobile

Tools

Swift

Kotlin

Job description

Mozart AI in London is seeking a senior mobile engineer to own the Mozart app end to end. You’ll lead architecture, RN/Expo app, native Swift and Kotlin where needed, and ship weekly with solid performance and a great UX.

You’ll optimize for background/offline, real-time collaboration, audio playback, and social features, balancing platform differences and backend contracts. 5+ years in mobile development required; in-person role.