Senior Front-End Developer in Belfast

Founded in 1976, CGI is among the largest IT and business consulting services firms in the world, delivering innovative solutions across industries. As a Front-End Developer at CGI, you’ll design and build engaging, high-performance web applications that deliver meaningful impact for clients across industries. You’ll use modern technologies like React.js and TypeScript to create seamless, responsive user experiences that drive digital transformation. Working in an Agile and collaborative environment, you’ll partner with designers, backend engineers, and consultants to bring ideas to life. You’ll also mentor others and help shape our front‑end capability within a supportive, growth‑focused culture that values innovation, ownership, and teamwork.

Due to the secure nature of the programme, you will need to hold UK Security Clearance or be eligible to go through this clearance.

Your future duties and responsibilities:

• Design, develop, and maintain user‑facing applications using modern front‑end frameworks and tools.
• Collaborate closely with designers and backend engineers to create responsive, accessible, and high‑performing interfaces that enhance client outcomes.
• Contribute to Agile ceremonies, promote best practices, and support junior developers, helping build a culture of learning and technical excellence.
• Design, develop, and deliver high‑quality front‑end applications using React.js and TypeScript.
• Collaborate with cross‑functional teams to ensure seamless integration with backend services.
• Participate in Agile ceremonies and contribute to iterative delivery and improvement.
• Review code, implement testing, and optimise application performance.
• Mentor and support junior developers, promoting collaboration and knowledge sharing.
• Contribute to consistent front‑end practices across projects and teams.
• Apply UX/UI and accessibility best practices to ensure intuitive, inclusive designs.

Required qualifications to be successful in this role:

You should have proven experience developing front‑end applications using modern JavaScript frameworks, with a focus on React.js and TypeScript. You’ll bring strong collaboration skills, attention to detail, and a passion for creating clean, efficient, and user‑friendly code.

Essential qualifications:

• Extensive experience developing front‑end applications with React.js or similar frameworks.
• Strong understanding of JavaScript (ES6+), HTML5, and CSS3.
• Experience integrating with RESTful APIs and GraphQL services.
• Familiarity with Angular or Vue.js for cross‑project consistency.
• Experience working in Agile environments using Jira, Confluence, and Git.
• Excellent communication and teamwork skills.
• Proactive, growth‑oriented approach with attention to quality and performance.

Desirable qualifications:

• Experience in an IT consulting or client‑facing role.
• Familiarity with cloud platforms (Azure, AWS, or GCP).
• Knowledge of CI/CD pipelines and automated testing frameworks.
• Understanding of UX/UI principles and accessibility standards (WCAG).

Skills:

• Front End Development
• GraphQL
• React Native
• RESTful (Rest-APIs)
• Angular
• Vue.js

What you can expect from us:

Together, as owners, let’s turn meaningful insights into action. Life at CGI is rooted in ownership, teamwork, respect and belonging. Here, you’ll reach your full potential because you are invited to be an owner from day 1 as we work together to bring our Dream to life. That’s why we call ourselves CGI Partners rather than employees. We benefit from our collective success and actively shape our company’s strategy and direction.

Your work creates value. You’ll develop innovative solutions and build relationships with teammates and clients while accessing global capabilities to scale your ideas, embrace new opportunities, and benefit from expansive industry and technology expertise.

You’ll shape your career by joining a company built to grow and last. You’ll be supported by leaders who care about your health and well‑being and provide you with opportunities to deepen your skills and broaden your horizons.

Come join our team—one of the largest IT and business consulting services firms in the world.