Junior Full Stack Engineer in Cardiff

Location

Cardiff (Hybrid) — flexible working

Job Description

We are looking for a Junior Full‑Stack Engineer to help us design and build high‑quality software used across our enterprise environment. You’ll work in a cross‑functional agile team and contribute across the full development lifecycle, while growing your skills through pairing, code reviews, and mentorship. This is a great fit if you enjoy working across the stack – React/Next.js & TypeScript on the front end and Java/Spring Boot on the back end.

Key Responsibilities

• Deliver features across the stack: build UI with React/Next.js + TypeScript and services/APIs with Java/Spring Boot.
• Collaborate closely: pair programming, code reviews, refactoring, and writing tests (unit, component, end‑to‑end).
• Quality & accessibility: follow clean code, secure coding practices, WCAG‑aligned accessibility, and front‑end testing strategies.
• Help maintain clear, up‑to‑date technical documentation to make onboarding easier for new team members.
• Agile ways of working: actively engage in stand‑ups, planning, reviews, and retrospectives.

Knowledge, Skills and Experience

Required qualifications

• Some commercial experience (or substantial project/placement work) building web applications.
• Front end: basics with React and TypeScript; familiarity with Next.js (routing, data fetching).
• Back end: fundamentals in Java and Spring Boot (building simple REST endpoints, data access).
• Testing mindset: exposure to Jest/React Testing Library and JUnit on the server side.
• Version control: comfortable with Git, branches, pull requests, and code reviews.
• Databases: basic SQL and awareness of document/relational databases.
• Communication: clear written and spoken English; collaborative and open to feedback.
• Education: Bachelor’s or Master’s in Computer Science/related field or equivalent practical experience (e.g., bootcamp, strong portfolio, internships).

Other qualifications

• Azure familiarity and CI/CD with Azure Pipelines or GitHub Actions.
• Containers & cloud basics: Docker, environment configuration, and deployment fundamentals.
• OpenAPI/Swagger (design/consumption) and API tools (e.g., Postman, Bruno).

What do we offer?

• A dynamic, international and challenging work environment.
• Training and support to reach your full potential including the opportunity for continuous professional development.
• Attractive terms and conditions, including competitive salary, pension package and a range of flexible benefits and rewards.
• Challenging tasks with individual development and training opportunities.

Equal opportunities for all

The success of our organisation stands with the quality of our people and the ideas they have. Insights and innovative solutions for our customers are the result of an interplay of cultures, knowledge and experience. That is why diversity is extremely important to Atradius. To ensure that all colleagues within Atradius can develop their qualities, we promote an inclusive culture in which everyone feels involved and valued. We encourage and welcome everyone to apply to our positions.

Contact

Elan BOOTH, Human Resources, is available by e‑mail at Elan.Booth@atradius.com.