Web Developer

Web Developer

Summary

Location: Crawley

Day Rate: Negotiable

Duration: 3 months initially (16 weeks)

Availability: ASAP

About the Role

As a Web Developer within Mastercard's Digital Development & Delivery team, you will be responsible for building and maintaining high-quality customer-facing digital experiences across our .com and mobile platforms.

You will work hands-on with modern front-end technologies, including React, Next.js, GraphQL, and headless CMS systems (Adobe AEM), delivering exceptional, secure, accessible, and high-performing interfaces.

Collaborating closely with Product Owners, UX/UI designers, QA engineers, and partner teams, you will develop scalable front-end solutions that align with our design system and digital platform strategies. You will also support L3 operational activities as part of production excellence.

Key Responsibilities:

Front-End Development Delivery

• Build reusable, efficient, and high-performing UI components.
• Implement responsive, accessible, and secure user interfaces.
• Integrate front-end components with GraphQL and RESTful APIs.

Code Quality and Testing

• Write clean, maintainable code following coding standards and best practices.
• Contribute to peer code reviews and participate in test automation where appropriate.
• Support automated and manual testing activities across the development lifecycle.

Operational Support and Continuous Improvement

• Participate in L3 support activities, assisting with triage and issue resolution.
• Monitor site performance and collaborate on improvement initiatives.
• Stay updated with modern front-end technologies, frameworks, and patterns.

Collaboration and Agile Delivery

• Work closely with Product Owners, Designers, and Engineers to deliver sprint commitments.
• Contribute to backlog refinement, sprint planning, and team ceremonies.
• Assist in maintaining technical documentation and knowledge sharing.

Security, Accessibility, and Compliance

• Develop with security, accessibility (WCAG), and regulatory compliance in mind.
• Ensure that web interfaces are tested for performance, SEO, and observability metrics.

Required Skills & Experience:

• Bachelor's degree in Computer Science, Software Engineering, or relevant experience.
• 2+ years of professional front-end development experience.
• Proficient with React, Next.js, and modern JavaScript (ES6+).
• Solid understanding of HTML5, CSS3 (SASS/LESS), and responsive web design principles.
• Experience integrating with GraphQL APIs and RESTful services.
• Familiarity with headless CMS platforms (Adobe AEM desirable).
• Exposure to CI/CD pipelines, Git version control, and Agile delivery.
• Good understanding of web performance, security, and accessibility standards.
• Knowledge of web analytics, SEO, and observability concepts is advantageous.
• Collaborate effectively within cross-functional agile squads.
• Communicate clearly and respectfully with technical and non-technical colleagues.
• Provide input on technical designs, solutions, and delivery estimates.
• Support a culture of code quality, peer reviews, and best practice sharing.