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.
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London, UK£60k-£100k + Equity
Featured roleLondon, UK£60k-£100k + Equity
Mobile Engineer at Mozart AI — VC-backed music tech startup
Join Mozart AI, the Balderton-backed startup where 100k+ users have already created 1M+ songs. We're looking for a React Native expert to own our mobile experience end-to-end. If you want to build the 'Instagram of music creation' alongside a talent-dense team in London and ship features that reach millions of listeners, this is your role. You'll get significant equity, work with top-tier AI audio tech, and help define the future of how the world creates music.
Overview
Why this role stands out
Company
Responsibilities
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.
Candidate profile
Who this is a fit for
- 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.
What makes it remarkable
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.
Jack & Jill
How Jack & Jill work together
I get to know what you’re great at, then find roles you’d never find yourself.Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.
I recruit from Jack’s network and make the intro when I spot a great match.And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.
About Jack & Jill
Meet Jack
Jack gets to know what you are great at, what you want next, and makes sure Jill considers you for the right opportunities.
How does this work?
Jack's an AI agent for job searching and career coaching. He works for you.
Jill is the AI recruiter working for the company. She recruits from Jack's network.
If it's a match and the company wants to meet you, they'll make the intro. In the meantime, if you'd like, Jack will send you excellent alternatives.
Jack