Company: Jack & Jill
Location: London
Job Description:
Job Title
Senior Frontend Engineer
Salary
£150k + Equity
Company Description
Agentic AI data intelligence startup based in London Bridge
Job Description
Join a high-growth team of nine as a Senior Frontend Engineer building an AI-native platform for global enterprises. You will bridge the gap between design and engineering, shipping high-quality code at pace while shaping the core user experience. This is a high-ownership role for a builder who loves solving complex data problems with simple, elegant solutions.
Location
London, UK
Why this role is remarkable
- Work alongside an elite founding team including multiple Rhodes Scholars and former leaders from GoCardless and Spotify.
- Tackle the frontier of applied AI by building an agentic platform that cleanses and standardizes massive enterprise spend data without complex integrations.
- Influence every aspect of the product culture as an early employee, enjoying significant ownership over the frontend architecture and technical direction.
What You Will Do
- Design, build, and maintain a scalable frontend architecture using React or Vue to deliver a seamless, high-performance data intelligence experience.
- Collaborate directly with the design team to translate complex AI-driven data insights into intuitive, effective, and delightful UI components.
- Take full ownership of the development lifecycle from initial idea and design to deployment, ensuring the codebase remains resilient and maintainable.
The ideal candidate
- Extensive professional experience with modern frontend frameworks like React or Vue, backed by a portfolio of side projects or visible product work.
- A product-minded engineer with “high agency” who thrives in ambiguous startup environments and prefers shipping features over following rigid tickets.
- Strong design instincts and a passion for UX, with the ability to act as a technical sparring partner on product decisions and data visualization.
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Posted: June 11th, 2026