Join a talent-dense team of eight building the future of music creation. You will own major product milestones end-to-end for a platform already serving 100k+ users. You'll lead a critical migration to server-side rendering and redesign the frontend architecture, ensuring the codebase remains scalable and performant as the product evolves rapidly.
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Mid-level Frontend Engineer at Mozart AI
Join Mozart AI, a high-growth startup backed by $7M from Balderton Capital and the founders of Eventbrite and Frame.io. We are looking for a Mid-level Frontend Engineer to help us build the future of music creation. With over 100k users and 1 million songs already created, you'll own major features end-to-end, lead a migration to Next.js, and redesign our architecture for scale. If you have 3-5 years of experience, a passion for clean React code, and want to work on a product used by everyone from hobbyists to world-class producers, this is your chance to join a talent-dense team in London with significant equity.
About this role
Role overview
About the company
Mozart AI
SoftwareLondon, United KingdomPre-Seed (VC-backed)
Mozart AI - VC-backed Generative Audio platform with $7M+ raised from Balderton Capital and the founders of Eventbrite and Frame.io.
Backed by EWOR, New Renaissance Ventures, Atlantis Ventures, Felix Jahn, Stefan Glaenzer.
What you'll do
What you will do
- Redesign the frontend architecture to establish clean component structures and scalable state management patterns using React and TypeScript.
- Lead the incremental migration to server-side rendering (Next.js) to optimize SEO and performance for high-value user-facing pages.
- Partner with backend engineers to execute a critical database migration from non-relational to relational systems with zero data loss.
Who you are
Who this is a fit for
- 3-5 years of experience with deep expertise in React internals, TypeScript mastery, and professional-grade state management (Zustand/Redux).
- Proven track record of shipping server-side rendering (SSR) in production environments and managing complex, media-heavy frontend performance.
- A founding-team mindset characterized by high velocity, low ego, and a first-principles approach to solving technical and product challenges.
Why this role
Why this role is remarkable
- Work on a category-defining product backed by top-tier investors like Balderton Capital and industry icons from Eventbrite and Frame.io.
- Exceptional traction with 1M+ songs already created by a diverse user base ranging from shower singers to A$AP Rocky’s producer.
- High-impact founding culture where you have significant equity and the autonomy to shape the architectural future of a high-growth AI startup.
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