Lead Java Engineer
Confirmed on the employer's own hiring board on Oct 6, 2026. First seen by Alion on Sep 29, 2026. Capgemini scores B on the Alion truth index.
Job Title: Lead Java Developer
Location: London
About the Job you are considering:
Join Capgemini’s Cloud & Custom Applications (C&CA) practice within the Financial Services business, where we help clients solve complex challenges through innovative, scalable, and business-critical technology solutions. Guided by our vision to Consult with Purpose. Continuously Evolve. Architect Tomorrow., we are seeking a Java Full Stack Developer to deliver high-quality applications that drive business value and support strategic transformation. You will work alongside trusted advisors, architects, and delivery teams to build secure, resilient, and future-ready solutions while embracing continuous learning, AI-enabled innovation, and engineering excellence.
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.
Key Responsibilities:
- Deliver scalable, high-quality application solutions that support critical business functions and client outcomes.
- Collaborate with business stakeholders, product teams, architects, and engineers to translate requirements into effective solutions.
- Design and develop secure, resilient, and maintainable applications that meet performance and reliability expectations.
- Build seamless integrations between business services and applications to improve operational efficiency and user experience.
- Contribute to solution design and architectural decisions that support long-term scalability and sustainability.
- Identify and implement opportunities for intelligent automation and AI-enabled innovation within application landscapes.
- Drive code quality through peer reviews, testing, continuous improvement, and adherence to engineering standards.
- Troubleshoot complex issues and ensure timely resolution while minimising business impact.
- Produce clear technical documentation that supports knowledge sharing and maintainability.
- Promote a culture of collaboration, continuous learning, and future-ready capability development across teams.
Required Skill:
- Proven experience delivering enterprise-scale full stack software solutions.
- Strong hands-on experience in Java development, including modern enterprise application
- design and development practices.
- Strong Python development experience.
- Experience designing and implementing distributed and microservices-based architectures.
- Strong understanding of API design, systems integration, and event-driven application patterns.
- Experience developing responsive user interfaces and integrating frontend and backend services.
- Strong knowledge of relational database concepts, data modelling, and performance optimisation.
- Understanding of software design principles, data structures, concurrency, and application performance tuning.
- Experience working within Agile delivery environments and collaborating with cross-functional teams.
- UK Broker Dealer and Capital Markets domain experience is essential.
- Strong analytical, problem-solving, stakeholder management, and communication skills.
- Awareness of AI-assisted development approaches and the ability to leverage emerging AI capabilities to improve delivery outcomes.
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 Manage Mentor, 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 organisations 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 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 2024 global revenues of €22.1 billion.
Make it real | www.capgemini.com