Senior Java Software Engineer

Location: London

Working Model: Hybrid (2 days onsite per week)

Contract Length: 6 Months

Day Rate: £400–£450 per day (Inside IR35)

About the Role

We are seeking a Senior Java Developer to join a dynamic engineering team delivering high-impact digital transformation solutions for a major UK retailer. You will work with modern backend technologies, microservices, event-driven systems, and cloud-based architectures to build scalable, secure, and high-performing applications.

Key Responsibilities

• Develop and maintain backend services using Java, Spring Boot, and Spring Security
• Design and implement microservices and event-driven architectures using Kafka
• Build and maintain CI/CD pipelines (GitHub Actions, Jenkins, shell scripting)
• Create unit, integration, and performance tests (Mockito, Gatling, JMeter)
• Troubleshoot, monitor, and optimise applications using New Relic and Grafana

Essential Skills

• Strong experience with Java, Spring Boot, and microservices
• Hands-on with Kafka
• Strong CI/CD background (Jenkins, GitHub Actions)
• Experience with PostgreSQL and MongoDB
• Excellent communication and stakeholder engagement skills

Desirable Skills

• Exposure to AWS or AI technologies
• Performance testing (Gatling, JMeter)
• Monitoring tools (New Relic, Grafana)
• Shell scripting
• Secure coding practices and Spring Security knowledge