Senior Front-End Engineer: React & AI Web Apps (Lisbon)

Cox Enterprises, Inc.; Coventry; Hybrid; GBP 58,000 - 75,000; Full time

Job summary

Cox Automotive Europe is expanding its Lisbon Technology Hub and seeking a Senior Front-End Engineer to shape world-class web experiences across Europe. You’ll work with React, GraphQL, and micro-frontend architectures, leveraging AI-assisted tooling, and collaborating with product, design, and back-end teams.

You’ll contribute to cloud-native deployments on AWS, embrace modern rendering approaches (SSR, SSG, SPA, PWA), and help mentor engineers while driving accessibility and performance.

Qualifications

• Expert-level experience with React and modern front-end development.
• Strong experience designing and consuming GraphQL APIs.
• Experience building and supporting Micro-Frontend architectures.
• Strong knowledge of JavaScript/TypeScript, HTML, CSS, and responsive design principles.
• Experience with rendering approaches including SSR, SSG, SPA, and PWA.
• Experience deploying and supporting front-end applications in AWS environments.
• Knowledge of accessibility, usability, and front-end performance best practices.
• Experience with testing frameworks such as Jest and React Testing Library.
• Experience working in Agile environments with CI/CD practices.
• Hands-on experience with AI-assisted development tools such as GitHub Copilot, Claude Code, or similar.
• Strong communication and collaboration skills.
• Professional proficiency in English.

Responsibilities

• Design, build, and maintain engaging, scalable, and responsive user experiences.
• Develop and evolve micro-frontends using modern React-based architectures.
• Design and consume GraphQL APIs while collaborating with back-end teams.
• Apply rendering strategies including SSR, SSG, SPA, and PWA.
• Translate UX concepts into high-quality, accessible UIs.
• Incorporate automated testing and continuous delivery into releases.
• Optimise performance, accessibility, security, and overall UX.
• Participate in architectural discussions and influence technical design.
• Review code and provide guidance to engineers.
• Mentor and support junior developers.
• Leverage AI-assisted tools to enhance productivity while maintaining engineering excellence.
• Contribute to a culture of innovation and continuous learning.

Skills

React

GraphQL

Micro-Frontends

JavaScript/TypeScript

HTML/CSS

Accessibility

CI/CD

Agile

AI-assisted development tools

Communication & collaboration

Tools

Next.js

AWS

Terraform

GraphQL tooling

Jest

React Testing Library

Playwright

GitHub Copilot

Claude Code

New Relic

Job description

Cox Automotive Europe is expanding its Lisbon Technology Hub and seeking a Senior Front-End Engineer to shape world-class web experiences across Europe. You’ll work with React, GraphQL, and micro-frontend architectures, leveraging AI-assisted tooling, and collaborating with product, design, and back-end teams.

You’ll contribute to cloud-native deployments on AWS, embrace modern rendering approaches (SSR, SSG, SPA, PWA), and help mentor engineers while driving accessibility and performance.