Senior Java Microservices AWS Developer - 6-Month Contract - Hybrid (London)

Senior Java Microservices AWS Developer - 6-Month Contract - Hybrid (London)

We're looking for an experienced Senior Java Backend Developer to work on the design and delivery of large-scale, cloud-native applications within a complex enterprise environment. The role is hands-on and will focus on building and evolving Java microservices on AWS as part of a wider platform modernisation programme.

Key Responsibilities

• Design and develop Back End services using modern Java (Java 11+), Spring Boot, and microservices architecture.
• Build and maintain RESTful APIs for distributed, enterprise-grade systems.
• Develop scalable, high-performance microservices following best-practice design patterns.
• Design and implement cloud-native solutions using AWS services including Lambda, ECS Fargate, EC2, S3, RDS, and API Gateway.
• Contribute to event-driven architectures using Kafka or similar messaging technologies.
• Build and optimise multithreaded and concurrent Java applications.
• Containerise applications using Docker and deploy via Kubernetes.
• Implement and maintain CI/CD pipelines using tools such as Jenkins, GitHub Actions, or AWS CodePipeline.
• Ensure security, performance tuning, logging, and monitoring using AWS-native tooling.
• Collaborate closely with engineers, architects, and product stakeholders, taking ownership of features from design through to production.

What You Will Ideally Bring

• 10+ years' experience in Java Back End development.
• Strong hands-on experience with Java 11 or above, ideally Java 17.
• Extensive experience with Spring Boot, microservices, and core Spring frameworks.
• Solid understanding of concurrency, Multithreading, and Java design patterns.
• Strong hands-on AWS experience, including serverless and container-based architectures.
• Experience with Kafka or other message-based systems.
• Strong database experience with complex SQL and enterprise databases such as DB2 or Sybase, plus some NoSQL exposure.
• Experience with Docker, Kubernetes, and modern CI/CD practices.
• Strong testing background including JUnit, integration testing, and TDD.
• Experience working in Agile, enterprise-scale, regulated environments.

Contract Details

• Duration: 6 months (with potential extension)
• Day Rate: Up to £525 per day (Inside IR35)
• Location: London - Hybrid (2 days onsite per week)
• Start Date: ASAP