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Senior Frontend Developer at Gizmo

Gizmo.ai is looking for a Senior Frontend Developer with 8+ years of experience and a startup background to join their London team. This is a unique opportunity to shape the frontend architecture of a fast-growing AI platform while working alongside a world-class engineering team in the heart of the city's tech hub.

About this role

Role overview

Gizmo.ai is seeking a Senior Frontend Developer to lead the evolution of our user interfaces. You will be responsible for architecting scalable, high-performance frontend systems that power our cutting-edge AI platform. This is a critical role where your technical expertise will directly shape the product experience for thousands of users globally.

About the company

Gizmo

Gizmo

Software

Gizmo is an AI startup on a mission to make learning so easy that anyone can learn anything. We're building Duolingo for Anything - a platform that uses gamification and social mechanics to make learning fun. With over 1.5 million monthly active users and $5M in annual recurring revenue, we’re already one of the fastest-growing startups in the UK. Backed by leading investors, we recently raised $22M in Series A funding to accelerate our vision of helping 1 billion people learn.

What you'll do

What you will do

  • Architect and build sophisticated, responsive web applications using modern React and TypeScript workflows.
  • Collaborate closely with product and design teams to translate complex requirements into intuitive user interfaces.
  • Mentor junior developers and establish frontend engineering best practices across the organization to ensure code quality.

Who you are

Who this is a fit for

  • Possesses at least 8 years of professional software development experience with a mastery of modern frontend technologies.
  • Has a proven track record of success within a fast-paced startup environment, demonstrating adaptability and ownership.
  • Is based in London with easy access to Old Street or Liverpool Street stations for regular in-person collaboration.

Why this role

Why this role is remarkable

  • Join a high-growth AI startup at a pivotal stage, influencing both technical direction and product strategy.
  • Work in a collaborative, fast-paced environment where innovation is prioritized and technical debt is actively managed.
  • Enjoy a prime Central London location with a high-performance culture and the autonomy to drive significant architectural decisions.

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