Senior Full Stack Engineer (frontend leaning) in London

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 million monthly active users and $4M in annual recurring revenue, we’re already one of the fastest-growing startups in the UK. Backed by leading investors, we recently raised $16M in Series A funding to accelerate our vision of helping 1 billion people learn.

Role Overview

As a Fullstack Developer at Gizmo, you’ll report directly to the Founders and play a key role in shaping the product experience for our rapidly growing user base. While you’ll be comfortable working across the full stack, your focus will be on delivering world-class frontend experiences that make learning intuitive, playful, and engaging. You’ll work closely with our wider engineering team to build, test and ship features that bring our vision to life. You’ll be joining a fast-paced, collaborative team during an exciting stage of growth, with plenty of opportunity to make a significant impact and grow alongside us as we scale.

Key Responsibilities

• Build, maintain and own user-facing features with a focus on performance, usability, and delightful interactions across web and mobile platforms.
• Collaborate closely with designers and product managers to translate Figma designs and product requirements into functional, high-quality code.
• Contribute across the full stack. While frontend will be your focus, you’ll also work on back-end services and APIs when needed.
• Own features end-to-end, from technical design and implementation to release, iteration, and ongoing improvement.
• Participate in code reviews, technical planning, and team stand-ups, helping us maintain a high engineering standard.

Requirements

• Strong fullstack fundamentals with a frontend focus and experience building projects end-to-end. You have a sharp eye for UX, accessibility and performance.
• You are skilled with React, TypeScript and Tailwind.
• Preference (not essential) for proficiency in Python and Postgresql and are comfortable working with APIs and contributing to back-end logic.
• Driven by impact - you prioritise work that moves the needle.
• Self-starter with a maker mindset. We’re looking for ex-founders or individuals with start-up experience.
• You are a fast learner who’s not afraid of new challenges - you are ambitious and motivated to build something meaningful.
• Open-minded and feedback-oriented, always striving to learn and improve.

Highly competitive salary. You’ll own a piece of what you’re building - meaningful equity included. Hybrid working model with 4 days in the London Liverpool Street office. The opportunity to become one of the earliest employees in one of the UK’s fastest-growing startups.