Senior Full-Stack Engineer: Java/Spring + React (Hybrid)

CGI Group Inc.; City of Westminster; Hybrid; GBP 80,000 - 100,000; Full time

Job summary

A leading IT consulting firm in London is seeking a Senior Software Engineer to design and develop scalable applications using Java and React. You will take ownership of technical delivery, ensuring high-quality and user-focused solutions. Ideal candidates will have strong experience with Java frameworks and frontend technologies. The role supports hybrid work, offers excellent benefits, and values innovation and teamwork in a supportive culture.

Benefits

Insurance coverage

Medical benefits

Pension plan

Flexible time off

Share Purchase Plan

Member discounts

Health and Wellbeing Programme

Qualifications

• Strong experience with Java and frameworks such as Spring or Spring Boot.
• Solid experience with React, JavaScript (ES6+), HTML, and CSS.
• Experience designing and building RESTful APIs using JSON.
• Familiarity with relational and/or NoSQL databases.
• Experience using Git or other version control systems.

Responsibilities

• Design & develop backend services using Java and modern frameworks.
• Build & enhance responsive frontend applications using React.
• Develop & consume RESTful APIs to support scalable architectures.
• Write & maintain clean, well-tested, and maintainable code.
• Collaborate across multidisciplinary teams to deliver features end-to-end.
• Review code, share knowledge, and contribute to engineering best practices.
• Troubleshoot, optimise & improve application performance.
• Support CI/CD pipelines and deployment activities.

Skills

Java

Spring Boot

React

JavaScript (ES6+)

RESTful APIs

Git

Problem-solving mindset

Strong communication skills

Job description

A leading IT consulting firm in London is seeking a Senior Software Engineer to design and develop scalable applications using Java and React. You will take ownership of technical delivery, ensuring high-quality and user-focused solutions. Ideal candidates will have strong experience with Java frameworks and frontend technologies. The role supports hybrid work, offers excellent benefits, and values innovation and teamwork in a supportive culture.