Senior Full Stack Developer

About the job you're considering

We are looking for an experienced Senior Full Stack Developer to join our Experience Engineering team and help create high-quality digital products and services for our clients.

This is a hands-on engineering role with real technical influence. You’ll work across frontend and backend technologies, collaborating with product, UX, architecture, engineering and client stakeholders to turn user and business needs into secure, scalable, accessible and maintainable solutions. You’ll help shape technical decisions while remaining close to the code and taking ownership throughout the software development lifecycle.

You’ll join multidisciplinary teams working on complex digital challenges, where you’ll have the opportunity to lead technical delivery, solve difficult engineering problems, mentor other developers and help raise engineering standards.

You won’t be expected to know every technology. We’re looking for someone with strong engineering fundamentals, good technical judgement and the ability to learn and adapt as projects and technologies change.

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.

• If you are successfully offered this position, you will go through a series of pre-employment checks, including:
• identity, nationality (single or dual) or immigration status, employment history going back 3 continuous years, and unspent criminal record check (known as Disclosure and Barring Service)

Your role

As a Senior Full Stack Developer, you’ll combine hands-on software engineering with technical leadership. You’ll take ownership of complex features and services, contribute to architectural decisions and help teams deliver reliable, maintainable software.

You’ll:

• •Design, build, test, deploy and support production-grade applications across frontend and backend technologies.
• •Take ownership of complex features and services across the software development lifecycle, from technical discovery and design through to deployment and production support.
• •Work with Product Owners, UX Designers, Architects, Engineers and client stakeholders to turn user and business requirements into effective technical solutions.
• •Help shape application architecture, APIs, integration patterns, data flows and cloud solutions, making pragmatic technical decisions and explaining the trade-offs involved.
• •Build responsive, accessible and performant user experiences using modern frontend engineering approaches.
• •Develop backend services and APIs that are secure, scalable, resilient and maintainable.
• •Champion engineering quality through automated testing, code review, secure development, CI/CD, observability and effective production support.
• •Lead technical discussions and code reviews, helping teams make good engineering decisions and navigate complex technical problems.
• •Mentor and support other developers through pairing, coaching, knowledge sharing and constructive technical feedback.
• •Contribute reusable patterns, components and approaches that improve engineering quality and developer experience across the wider team.
• •Explore appropriate uses of AI-assisted engineering and automation to improve productivity and software quality, following relevant client and Capgemini policies and approvals.

You can bring your whole self to work. At Capgemini, stiving for equity, diversity and inclusion is part of everyday life, and will be part of your working reality. We have built an inclusive and welcoming environment, for everyone.

Your skills and experience

We’re interested in experienced engineers who can demonstrate strong software engineering judgement and end-to-end delivery, rather than candidates who simply match a checklist of technologies.

You’ll bring:

• •Strong commercial experience delivering production software across the full stack, with depth in modern JavaScript and TypeScript engineering.
• •Strong hands-on experience with Node.js and one or more modern frontend technologies such as React, Angular or Vue.
• •Experience designing and developing APIs and backend services, using approaches such as REST or GraphQL.
• •Experience taking software through the full development lifecycle, including design, implementation, automated testing, deployment, monitoring and support.
• •A strong understanding of software design, architecture patterns, code quality, security and maintainability.
• •Experience working with cloud platforms such as Azure, AWS or GCP, alongside modern CI/CD and DevOps practices.
• •Good knowledge of frontend engineering principles including responsive design, accessibility, performance and component-based development.
• •Experience diagnosing complex technical problems and making pragmatic engineering decisions where there are competing requirements or constraints.
• •Experience working collaboratively with architecture, product, UX and engineering disciplines and communicating technical choices clearly to both technical and non-technical stakeholders.
• •Experience mentoring or supporting other engineers and helping improve engineering practices within a team.
• •The ability to learn unfamiliar technologies, understand how systems fit together and select appropriate solutions rather than being tied to a particular framework.
• •An interest in using AI-assisted development and automation responsibly to improve engineering productivity and quality, subject to appropriate client and Capgemini policies and approvals.

Experience in some of the following would also be valuable: design systems and component libraries; distributed or event-driven architectures; microservices; cloud-native engineering; infrastructure as code; observability; mobile or cross-platform development; or AI-enabled products.

Your Security Clearance

• To be successfully appointed to this role, it is a requirement to obtain Security Check (SC) clearance.
• To obtain SC clearance, the successful applicant must have resided continuously within the United Kingdom for the last 5 years, along with other criteria and requirements.
• Throughout the recruitment process, you will be asked questions about your security clearance eligibility such as, but not limited to, country of residence and nationality.
• Some posts are restricted to sole UK Nationals for security reasons; therefore, you may be asked about your citizenship in the application process.

What does 'Get The Future You Want' mean to you?

• 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’ll be bringing your unique skills and perspectives to the team, inspiring and taking inspiration from your teammates as you unlock value in everything you do. You’ll be joining a professional community of experts, who have got your back and will support you, every step of the way.
• You will be encouraged to have a positive work-life balance. Our hybrid-first way of working means we embed hybrid working in all that we do and make flexible working arrangements the day-to-day reality for our people. All UK employees are eligible to request flexible working arrangements.

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 hel