Senior Java Contractors x 3

Oliver Bernard; Greater London; Hybrid; GBP 83,000 - 120,000; Full time

Job summary

Oliver Bernard is seeking three senior Java Developers to join a high-performing engineering team delivering cloud-native applications. You will design, develop and maintain Java microservices, work with Kafka, AWS and Kubernetes, and collaborate in an Agile environment to deliver scalable, resilient platforms.

The role focuses on building event-driven systems, with strong emphasis on engineering quality, automation, and production-ready deployments. Hybrid onsite in London, ASAP start.

Qualifications

• Extensive Java development experience, Java 11+ preferred.
• Proven experience with Apache Kafka and event-driven architectures.
• Cloud-native development on AWS with containerized services.
• Experience deploying and operating on Kubernetes and managing microservices.
• Strong understanding of REST APIs and distributed systems; solid CI/CD practices.

Responsibilities

• Design, develop and maintain high-performance Java microservices.
• Build and enhance event-driven architectures using Kafka.
• Develop cloud-native applications on AWS.
• Deploy and operate applications using Kubernetes.
• Collaborate with architects, product owners and engineering teams to deliver scalable solutions.
• Participate in code reviews and contribute to continuous improvement across the development team.
• Support production releases and help troubleshoot complex technical issues where required.
• Strong commercial experience with Java (Java 11+).
• Hands-on experience with Apache Kafka and AWS services.
• Experience deploying and managing applications on Kubernetes.
• Experience with CI/CD and automated testing; Agile/Scrum experience.

Skills

Strong communication

Stakeholder engagement

Agile/Scrum experience

Problem solving

Quick start mindset

Tools

Java

Kafka

AWS

Kubernetes

Spring Boot

Docker

Terraform

CI/CD

REST APIs

Observability tools

Job description

Contract: 6-month rolling contract

Start Date: ASAP

Overview

We are looking for three experienced Senior Java Developers to join a high-performing engineering team delivering large-scale, cloud-native applications. You'll be working on modern distributed systems, building highly scalable services using Java, Kafka, AWS and Kubernetes within an Agile environment.

This is an excellent opportunity for contractors who enjoy solving complex technical challenges and delivering resilient, event-driven platforms.

Key Responsibilities

• Design, develop and maintain high-performance Java microservices.
• Build and enhance event-driven architectures using Kafka.
• Develop cloud-native applications on AWS.
• Deploy and operate applications using Kubernetes.
• Collaborate with architects, product owners and engineering teams to deliver scalable solutions.
• Participate in code reviews and contribute to continuous improvement across the development team.
• Support production releases and help troubleshoot complex technical issues where required.
• Strong commercial experience with Java (Java 11+ preferred).
• Hands-on experience with Apache Kafka.
• Strong knowledge of AWS services.
• Experience deploying and managing applications on Kubernetes.
• Experience with REST APIs and distributed systems.
• Strong understanding of software engineering best practices, CI/CD and automated testing.
• Experience working in Agile/Scrum environments.
• Excellent communication and stakeholder engagement skills
• Spring Boot
• Docker
• Terraform or Infrastructure as Code
• Observability and monitoring tools
• Experience with high-volume, low-latency systems
• Financial Services or other enterprise-scale environments
• Inside IR35
• 6-month rolling contract
• Hybrid working: 2-3 days per week onsite in London
• Quick start preferred

What You'll Be Working On

You'll be joining an experienced engineering team delivering modern, cloud-native platforms using Java, Kafka, AWS and Kubernetes. The focus is on building resilient, scalable services that support business-critical applications, with a strong emphasis on engineering quality, automation and continuous delivery.