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Junior developer with front-end experience

London, GB💼 Full-time💰 $50,000–$50,000🗓 2026-09-01 → 2026-09-11

Core

Junior front-end developer building and maintaining the UI layer of a live, data-heavy public procurement product using React and Ruby on Rails.

Role type

Junior front-end engineer (React/Rails)

Builds

User interfaces for exploring, filtering, and understanding complex public procurement datasets

Domain

Public sector data / Government contracts

Deliverable

product features

Required skills

Modern JavaScript, React (functional components, hooks), Ruby on Rails views/partials, HTML, CSS (Flexbox, Grid), Unit testing (Jest/React Testing Library), Git workflows

Preferred skills

UI design eye (spacing, accessibility, responsive behavior), Utility-first CSS frameworks (Tailwind)

Technologies

React.js, Ruby on Rails, Stimulus, Tailwind CSS, Jest, React Testing Library, Git

Responsibilities

Build and maintain front-end code including React components and Stimulus controllers; Edit Rails views and partials to wire up React components; Implement UI designs from mockups or requirements; Fix bugs and make incremental improvements to existing views; Write and maintain unit tests for JavaScript and webpage components

Seniority

Junior, hands-on IC with mentorship

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