Principal Backend Engineer - Java

capco; United States; Hybrid; USD 132,000 - 185,000; Full time

Job summary

Capco in London is seeking a Principal Backend Engineer specializing in Java to design and deliver scalable enterprise services. You will craft APIs and microservices, work across cloud platforms, and contribute to architecture decisions.

You’ll apply AI-enabled workflows with human review, collaborate in agile teams, and help drive quality through automated testing and robust engineering practices.

Qualifications

• Expertise in Java 11, 17+ and Spring Boot.
• Experience with cloud-native and distributed architectures.
• Experience delivering large-scale enterprise backend systems.

Responsibilities

• 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.
• 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 with human review and responsible AI controls.

Skills

Java

Spring Boot

AWS

Microservices

Cloud-native

Distributed systems

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 microserv