Mobile Engineer (£60k-£100k + Equity) at Mozart AI

Job Title

Mobile Engineer

Salary

£60k-£100k + Equity

Company Description

Mozart AI - $7M+ VC-backed music technology startup

Job Description

You will own the end-to-end mobile experience for a viral music creation platform used by over 100,000 creators. As a key early hire, you'll build a high-performance React Native foundation, ship major features from prototype to production, and ensure the app feels 'Instagram-fast' while integrating professional-grade AI audio tools.

Location

London, UK

Why this role is remarkable

• Join a rocket ship that reached 1M+ songs created and 10M+ Spotify streams within months of its viral beta launch.
• Backed by $7M+ from elite investors including Balderton Capital and the founders of Eventbrite and Frame.io.
• High-impact ownership where you define the mobile architecture and standards for a product used by world-class music producers.

What you will do

• Architect and ship major React Native features while maintaining high-performance standards and p95 metrics for media loading.
• Lead the integration of complex mobile subscription states and revenue integrity using RevenueCat and native store kits.
• Collaborate directly with the CTO and Growth Lead to build a robust analytics foundation for data-driven product evolution.

The ideal candidate

• Proven expert in React Native who has shipped and maintained production apps on both iOS and Android stores.
• Experienced in optimizing media-heavy feeds, handling background audio playback, and managing complex local/global state tradeoffs.
• Strong background in implementing in-app purchases and managing the technical edge cases of subscription lifecycles and entitlements.

Next steps

Step 1. Visit our website
Step 2. Click 'Talk to Jack'
Step 3. Talk to Jack so he can understand your experience and ambitions
Step 4. Jack will make sure Jill considers you for this role
Step 5. If Jill thinks you're a great fit and her client wants to meet you, they will make the introduction.
Step 6. If not, Jack will find you excellent alternatives. All for free.