Senior Java Software Engineer

Thomson Keene are partnering with a leading global financial institution to hire a Senior Java Developer for a high-performing Payments Technology team responsible for building and supporting highly scalable, business-critical payment processing platforms.

Please note: This is a daily rate contract on an initial 6-18 months w/ 3 days per week on-site in South Dublin

This is a hands-on engineering role where you'll design, build, enhance and support high-volume, low-latency distributed systems that power global payments. Working within an Agile environment, you'll collaborate with Product Owners, Architects, Developers and QA Engineers to deliver resilient, event-driven solutions used across international banking operations.

What You'll Be Doing

• Designing and developing enterprise-scale Java applications
• Building microservices and REST APIs using Spring Boot
• Developing event-driven architectures leveraging Kafka and messaging technologies
• Creating scalable, high-performance payment processing solutions
• Driving software delivery through CI/CD and DevOps best practices
• Optimising application performance, troubleshooting production issues and supporting mission-critical systems
• Collaborating across engineering, architecture and product teams to deliver complex technical solutions
• Contributing to engineering standards, code quality and continuous improvement initiatives

Required Experience

• Strong hands-on development experience with Java
• Expertise in Spring Boot, Microservices and REST APIs
• Experience with Apache Kafka, messaging platforms and asynchronous processing
• Strong SQL and database design skills
• Experience building distributed systems and event-driven architectures
• CI/CD pipeline development and DevOps practices
• Containerisation experience with Docker and Kubernetes
• Strong debugging, root-cause analysis and performance tuning capabilities
• Experience securing APIs using OAuth2, JWT and related authentication technologies
• Agile software delivery experience including code reviews and engineering best practices

Desirable Experience

• Payments technology or banking systems experience
• ISO 20022 messaging standards
• Mulesoft integrations
• Oracle, MongoDB and Redis
• JBoss / OpenShift environments
• AWS, Azure or other cloud platforms
• Experience within highly regulated enterprise environments

Why Apply?

• Build software that processes high-value global payment transactions
• Work on large-scale distributed systems and modern cloud-native architectures
• Join a globally recognised engineering organisation
• Exposure to mission-critical, high-throughput platforms
• Opportunity to influence architecture, engineering standards and platform evolution