At a Glance
- Tasks: Own the frontend architecture and tackle performance challenges in a cutting-edge audio workstation.
- Company: Join Mozart AI, a dynamic startup backed by Balderton Capital.
- Benefits: Competitive salary of £120k plus equity and a chance to shape the future of music tech.
- Other info: Fast-paced environment with significant career growth and ownership opportunities.
- Why this job: Be a founding member and make a real impact on innovative audio technology.
- Qualifications: 5 years of frontend experience with expertise in TypeScript and React.
The predicted salary is between 120000 - 120000 £ per year.
- Job Title
- Founding Frontend Engineer
- Salary
- £120k + Equity
- Company Description
Mozart AI is a $6M seed-funded startup backed by Balderton Capital building a generative audio workstation that gives artists AI-powered control over stems, instruments, and composition.
Job Description
As Founding Frontend Engineer at Mozart AI, you will own the entire frontend architecture, managing a complex stack including React, Web GL, and Tan Stack Start.
You’ll tackle extreme performance challenges—like rendering 30k rectangles at 60fps—and build the "backend of the frontend" to ensure a seamless, professional experience for music creators worldwide.
- Location
- London, UK
- Why this role is remarkable
- Work on a performance-critical generative audio workstation featuring a Web GL renderer running at 60fps and managing 3M lines of React code.
- Join a high-intensity, $6M seed-funded team backed by Balderton Capital as a founding member with significant equity and technical ownership.
- Build a generational product that moves beyond basic AI generation into professional DAW features like stems, instruments, and individual note control.
What You Will Do
- Architect and own the "backend of the frontend," including complex state management (Zustand), SSR/CSR strategies, and real-time streaming via Web Sockets.
- Develop and maintain a high-performance design system and testing infrastructure (unit, integration, and e2e) to support rapid, large-scale consumer deployments.
- Collaborate directly with the CTO to shape the technical direction of the product and integrate sophisticated AI-driven audio features into the UI.
- The ideal candidate
- Approximately 5 years of professional frontend experience with deep expertise in Type Script, React, and modern state management libraries.
- Proven "Startup DNA" with experience as a founding engineer or early employee at a fast-growing consumer brand with high engineering standards.
- Ability to thrive in an intense, in-office London environment, working a 6-day week to build a category-defining creative tool.
- #J-18808-Ljbffr
Founding Frontend Engineer (£120k + Equity) at Mozart AI employer: Jack & Jill
At Jack & Jill, we pride ourselves on being an exceptional employer that fosters a dynamic and innovative work culture. Our team enjoys a range of benefits including flexible working arrangements, professional development opportunities, and a collaborative environment that encourages creativity and growth. Located in a vibrant area, we offer unique advantages such as access to cutting-edge technology and the chance to work with industry leaders in AI-driven marketing strategies.
StudySmarter Expert Advice🤫
We think this is how you could land Founding Frontend Engineer (£120k + Equity) at Mozart AI
✨Join Local Tech Meetups
Get out there and mingle with fellow developers by joining local tech meetups. It’s a fantastic way to meet people who might be working at Jack & Jill or know someone who does. Plus, you can pick up some trendy tech skills and trends while you're at it!
✨Contribute to Open Source Projects
Show off your coding chops by jumping into open-source projects. Not only does this give you practical experience, but it also gets you noticed in the dev community. You'll create a killer portfolio that speaks volumes about your skills to Jack & Jill.
✨Tap into Online Developer Communities
Don’t underestimate the power of online developer communities like GitHub, Stack Overflow, and even Reddit. Participate in discussions, share your projects, and build your visibility. We can often find opportunities through these channels that can lead to a full-time gig at companies like Jack & Jill.
✨Explore Job Boards Specifically for Tech Roles
Keep your eyes peeled on job boards that focus on tech roles. Sites like TechCareers or Stack Overflow Jobs can often have listings for companies like Jack & Jill that might not show up on broader job sites. Make it a habit to check these regularly, and don’t hesitate to apply directly through our website!
We think you need these skills to ace Founding Frontend Engineer (£120k + Equity) at Mozart AI
Some tips for your application 🫡
Show off your coding skills:When applying for a software engineering role, it's super important to showcase your coding skills. Make sure your CV includes your tech stack, any relevant programming languages you’re comfortable with, and examples of projects you've worked on. If you have a GitHub profile, link it up! We love to see code in action.
Tailor your portfolio:For a full-time role, we’d expect to see some solid examples of your work in your portfolio. Make sure to include at least two or three projects that highlight your problem-solving skills and your ability to work with different technologies. Focus on the projects that are most relevant to the position at Jack & Jill.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at Jack & Jill and how your skills align with the role. Show us your passion for software development. We dig enthusiastic candidates who understand the value of collaboration and continuous learning!
Be clear and concise:When it comes to writing your CV and cover letter, clarity is key. Avoid jargon that could confuse us and stick to simple, direct language. Highlight your achievements with quantifiable results where possible, and keep everything easy to read. A well-organised application goes a long way!
How to prepare for a job interview at Jack & Jill
✨Brush Up on Your Coding Skills
For a full-time software engineering role, it's crucial that we stay sharp with our coding abilities. Expect technical questions that might involve solving problems on the spot or discussing algorithms. Practise on platforms like LeetCode or HackerRank to get comfortable with the types of questions that often come up.
✨Know Your Tools and Frameworks
Make sure we’re well-acquainted with the tools and technologies listed in the job description. Familiarise ourselves with any specific frameworks or programming languages mentioned. If Jack & Jill uses React or Node.js, for instance, be ready to discuss how we’ve used them in previous projects or coursework.
✨Showcase Your Projects
Bring along a portfolio that highlights our best work. This could be code samples, GitHub repositories, or any side projects we’ve built. Make sure we can talk through our thought process for each project, especially the challenges we faced and how we solved them—this shows our problem-solving skills in action.
✨Prepare for Behavioural Questions
While technical skills are key, full-time positions also require cultural fit. Be ready to discuss our previous experiences and how we handle teamwork, conflict, and deadlines. Brush up on the STAR method—Situation, Task, Action, Result—to clearly articulate our past experiences when discussing how we've contributed to a team.
