Frontend Engineer: Data Visualization (Hybrid, London)

iO Associates; Greater London; Hybrid; GBP 65,000 - 90,000; Full time

Job summary

iO Associates is seeking a Frontend Software Engineer for a hybrid London role, crafting complex, high-performance web applications to visualise and navigate data. You will own core frontend components, extend them for customer-specific workflows across sectors, and move prototypes from concept to production with robust, reusable abstractions.

A strong eye for UX, accessibility and responsive design, plus experience with React, TypeScript and modern tooling, will help you thrive in a fast-paced,

Qualifications

• Frontend engineer with experience building complex, high‑performing web apps for data visualisation.
• Strong React/TypeScript proficiency and modern frontend tooling experience.
• Experience with real‑time data patterns and WebSockets is desirable.
• Experience with 3D data visualisation and related libraries is a plus.

Responsibilities

• Build core frontend components and interfaces, and extend them for customer‑specific workflows across sectors.
• Collaborate across teams to visualise and navigate data with robust, reusable abstractions.
• Rapidly turn prototypes into production code while prioritising performance and maintainability.

Skills

React

TypeScript

Vite

Tailwind CSS

gRPC/protobuf

3D visualization

WebSockets

Testing (Vitest/Jest/Playwright)

Storybook

UX/UI accessibility

Data visualization

Job description

iO Associates is seeking a Frontend Software Engineer for a hybrid London role, crafting complex, high-performance web applications to visualise and navigate data. You will own core frontend components, extend them for customer-specific workflows across sectors, and move prototypes from concept to production with robust, reusable abstractions.

A strong eye for UX, accessibility and responsive design, plus experience with React, TypeScript and modern tooling, will help you thrive in a fast-paced,