Lead Java Fullstack Developer - London, UK

Capgemini; Greater London; Hybrid; GBP 90,000 - 130,000; Full time

Job summary

Capgemini is seeking a Lead Java Full Stack Developer to design, develop, test, and deploy scalable enterprise applications across frontend and backend platforms in a hybrid London-based setup.

You will lead frontend work with HTML/CSS/JavaScript/React/Redux/Jest and backend services with Java, Spring Boot, and REST APIs. Emphasis on TDD, CI/CD, and Agile delivery for high-quality software.

Qualifications

• Experience building scalable enterprise applications in an Agile environment.
• Strong frontend and backend development capabilities with React and Java Spring Boot.
• Test-driven development and automated testing with JUnit/Mockito/Cucumber/Selenium.

Responsibilities

• Lead development of responsive web applications using HTML, CSS, JavaScript, React.js, Redux, Node.js, and Jest.
• Design and develop backend microservices using Java, Spring Boot, JPA, Hibernate, REST APIs, and Microservices architecture.
• Ensure code quality with TDD and automated tests (JUnit/Mockito/Cucumber/Selenium).
• Work with SQL databases and optimize queries (MS SQL preferred).
• Implement and maintain CI/CD pipelines for automated builds, tests, and deployments.

Skills

HTML

CSS

JavaScript

React

Redux

Node.js

Jest

REST APIs

Java

Spring Boot

Junit

Mockito

CI/CD

SQL

Tools

Jira

Confluence

Bitbucket

GitLab

Nexus

SonarQube

Veracode

Maven

NPM

Job description

About the Job you are considering:

We are seeking a Lead Java Full Stack Developer with strong experience in building scalable enterprise applications across frontend and backend technologies The ideal candidate will be responsible for designing developing testing and deploying high quality solutions in an Agile environment

Hybrid working:

The places that you work from day to day will vary according to your role, your needs, and those of the business; it will be a blend of Company offices, client sites, and your home; noting that you will be unable to work at home 100% of the time.

Your Role:

• Lead the development of responsive web applications using HTML, CSS, JavaScript, React.js, Redux, Node.js, and Jest.
• Design and develop backend microservices using Java, Spring Boot, JPA, Hibernate, REST APIs, and Microservices architecture.
• Ensure code quality through TDD practices, writing unit and integration tests using JUnit, Mockito, Cucumber, and Selenium.
• Work with SQL databases (MS SQL Server preferred) and optimize database performance and queries.
• Implement and maintain CI/CD pipelines for automated build, testing, and deployment processes.

Your Skills:

• Strong expertise in HTML CSS JavaScript React JS Redux Nodejs and Jest
• Extensive experience with Java Spring Boot JPA Hibernate REST APIs Microservices JUnit and Mockito
• Good knowledge of SQL MS SQL preferred cloud platforms and messaging technologies
• Handson experience with Jira Confluence Bitbucket GitLab Nexus SonarQube Veracode Maven and NPM
• Strong understanding of TestDriven Development TDD CICD pipelines and automated testing tools such as Cucumber and Selenium
• Experience working in AgileScrum teams participating in design development testing and deployment activities

We are a Disability Confident Employer:

Capgemini is proud to be a Disability Confident Employer (Level 2) under the UK Government's Disability Confident scheme. As part of our commitment to inclusive recruitment, we will offer an interview to all candidates who:

• Declare they have a disability, and
• Meet the minimum essential criteria for the role.
• Please opt in during the application process.

Make It Real (what does it mean for you):

• You'd be joining an accredited Great Place to work for Wellbeing in 2024. Employee wellbeing is vitally important to us as an organisation. We see a healthy and happy workforce a critical component for us to achieve our organisational ambitions. To help support wellbeing we have trained 'Mental Health Champions' across each of our business areas, and we have invested in wellbeing apps such as Thrive and Peppy.
• You will be empowered to explore, innovate, and progress. You will benefit from Capgemini's 'learning for life' mindset, meaning you will have countless training and development opportunities from thinktanks to hackathons, and access to 250,000 courses with numerous external certifications from AWS, Microsoft, Harvard ManageMentor, Cybersecurity qualifications and much more.
• You will be joining one of the World's Most Ethical Companies, as recognised by Ethisphere for 13 consecutive years. We live our values by making ethical business choices every day. Working ethically is at the centre of our culture at Capgemini, meaning you will be helping to create a future we can all be proud of.

Why you should consider Capgemini:

Growing clients' businesses while building a more sustainable, more inclusive future is a tough ask. When you join Capgemini, you'll join a thriving company and become part of a collective of free-thinkers, entrepreneurs and industry experts. We find new ways technology can help us reimagine what's possible. It's why, together, we seek out opportunities that will transform the world's leading businesses, and it's how you'll gain the experiences and connections you need to shape your future. By learning from each other every day, sharing knowledge, and always pushing yourself to do better, you'll build the skills you want. You'll use your skills to help our clients leverage technology to innovate and grow their business. So, it might not always be easy, but making the world a better place rarely is.

About Capgemini:

Capgemini is an AI-powered global business and technology transformation partner, delivering tangible business value. We imagine the future of organizations and make it real with AI, technology and people. With our strong heritage of nearly 60 years, we are a responsible and diverse group of over 420,000 team members in more than 50 countries. We deliver end-to-end services and solutions with our deep industry expertise and strong partner ecosystem, leveraging our capabilities across strategy, technology, design, engineering and business operations. The Group reported 2025 global revenues of €22.5 billion.

Make it real. | www.capgemini.com