Senior Java Engineer - Distributed Systems & Real-Time Data

Location: London Hybrid, 3 days per week onsite
Contract: 12 months
Rate: Up to £550 per day inside IR35

We are looking for a highly experienced Senior Java Engineer to join a major financial services organisation, working on highly scalable, mission-critical platforms supporting real-time data processing and distributed systems .

Key Responsibilities

• Design, develop and optimise highly scalable distributed and event-driven systems.
• Build real-time streaming and data-processing solutions using Apache Flink and Kafka.
• Develop enterprise applications using Java, Spring Boot and microservices architectures.
• Design fault-tolerant solutions capable of operating in high-throughput, mission-critical environments.
• Apply architectural patterns including CQRS and Event Sourcing.
• Develop and optimise REST APIs and backend services.
• Deploy and operate applications using Kubernetes, Docker and Terraform.
• Work within Azure/cloud-native environments.
• Improve system performance, resilience, scalability and availability.
• Implement appropriate security controls including OAuth and identity/access management.

Essential Experience

• Extensive commercial Java development experience, ideally including Java 17/21.
• Strong hands-on Spring Boot and microservices experience.
• Strong experience designing and developing distributed systems.
• Hands-on Apache Flink experience.
• Strong Apache Kafka and event-driven architecture experience.
• Experience building real-time/stream-processing platforms.
• Understanding of high-throughput, low-latency and fault-tolerant system design.
• Kubernetes and Docker experience.
• Experience working with Microsoft Azure.
• CI/CD and automated testing experience.

About Korn Ferry

Korn Ferry unleashes potential in people, teams, and organizations. We work with our clients to design optimal organization structures, roles, and responsibilities. We help them hire the right people and advise them on how to reward and motivate their workforce while developing professionals as they navigate and advance their careers. To learn more, please visit Korn Ferry at

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