# Principal Backend Engineer - Java [Capco](https://gurify.com/jobs?q=Capco) · UK - London · Posted 8 months ago Hybrid Principal [Backend](https://gurify.com/jobs/backend) [Java](https://gurify.com/jobs/java) [Apply on the original posting → (opens in a new tab)](https://job-boards.greenhouse.io/capco/jobs/7526625) ## Job description ### Principal Backend Engineer – Java ### Location: London (Hybrid) | Practice Area: Technology & Engineering | Type: Permanent ### Build scalable backend solutions that help shape the future of financial services. ### The Role Capco is growing our Engineering team, and we’re looking for experienced Principal Backend Engineers with strong Java skills and a passion for delivering innovative solutions in financial services. As a Principal Backend Engineer at Capco, you’ll contribute to high-impact, client-facing projects and work with cloud-native technologies across different domains within Financial Services & Energy. You’ll collaborate with talented engineers, contribute to architecture and engineering decisions, and have access to industry-leading learning and development opportunities. You’ll also use approved AI tools, automation and AI-enabled engineering workflows where appropriate to improve development speed, quality and productivity, while applying human judgement, responsible AI guardrails and appropriate review. ### What You’ll Do • Build and deliver scalable backend services using Java 11, 17+, designing APIs and microservices for enterprise systems. • Work across cloud platforms, particularly AWS, applying cloud-native deployment techniques and contributing to architecture and solution design. • Develop robust automated test coverage across unit, component, integration, end-to-end and performance testing. • Collaborate with clients, product managers and engineers in agile teams to design, deliver and troubleshoot large-scale distributed systems. • Use approved AI tools, automation and AI-enabled workflows to support engineering activities such as development, testing, troubleshooting and documentation, with appropriate human review and responsible AI controls. ### What We’re Looking For • Expertise in Java 11, 17+ and Spring Boot, with experience designing and delivering large-scale enterprise backend systems. • Experience with cloud-native and distributed architectures, including microservices, event-driven patterns and CQRS, preferably deployed within AWS. • Experience with CI/CD, Infrastructure as Code such as CloudFormation, and SQL and NoSQL databases. • Experience with Kafka, Java streaming, automated testing and troubleshooting distributed systems. • Curiosity and practical experience using approved AI, GenAI or AI-enabled development tools to improve engineering productivity, with an understanding of human-in-the-loop review, responsible AI, guardrails and escalation where required. ### Bonus Points For • An appetite to contribute to the wider Capco business through activities such as thought leadership, supporting RFPs and coaching or mentoring engineering colleagues. • Proficiency with GitLab for CI/CD processes and experience writing automation test cases in Cucumber using Behaviour Driven Development (BDD). • AWS Certified Solutions Architect – Associate or Professional level certification. • Knowledge of security best practices, including IAM Roles and KMS. • Experience exploring responsible AI-enabled engineering practices, including automation or Agentic AI workflows, while maintaining appropriate review, auditability and human oversight. ### Why Join Capco • Deliver high-impact technology solutions for Tier 1 financial institutions. • Work in a collaborative, flat, and entrepreneurial consulting culture. • Access continuous learning, training, and industry certifications. • Be part of a team shaping the future of digital financial services. • Help shape the future of digital transformation across FS & Energy. We offer a competitive, people-first benefits package designed to support every aspect of your life: ### Benefits • Core Benefits: Discretionary bonus, competitive pension, health insurance, life insurance and critical illness cover. • Mental Health: Easy access to CareFirst, Unmind, Aviva consultations, and in-house first aiders. • Family-Friendly: Maternity, adoption, shared parental leave, plus paid leave for sickness, pregnancy loss, fertility treatment, menopause, and bereavement. • Family Care: 8 complimentary backup care sessions for emergency childcare or elder care. • Holiday Flexibility: 5 weeks of annual leave with the option to buy or sell holiday days based on your needs. • Continuous Learning: Your growth, your way – minimum 40 hours of training annually. Take your pick from workshops, certifications and e-learning. Plus, a Business Coach assigned from Day One provides one-to-one guidance to support your goals and accelerate your development. • Healthcare Access: Convenient online GP services. • Extra Perks: Gympass (Wellhub), travel insurance, Tastecard, season ticket loans, Cycle to Work, and dental insurance. ### Inclusion at Capco We’re committed to making our recruitment process accessible and straightforward for everyone. If you need any adjustments at any stage, just let us know – we’ll be happy to help. We value each person’s unique perspective and contribution. At Capco, we believe that being yourself is your greatest strength. Our #BeYourselfAtWork culture encourages individuality and collaboration – a mindset that shapes how we work with clients and each other every day. #LI-DNI **Live in Capco’s hiring system.** Read from the company's own applicant tracking system, not reposted from a job board — so it's a real, open requisition rather than an ad that outlived the role. 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