Hybrid Senior Java Developer

at SRT Marine Systems plc

• Job title: Senior Java Developer
• Job type: Full Time
• Experience level: Senior
• Salary: Not specified
• Degree requirement: No Education Requirement
• Tech skills: Distributed Systems, Docker, Java, Kubernetes, MariaDB, Microservices, MySQL, RabbitMQ, RDBMS, Spring, Spring Boot, SpringBoot, SQL
• Location requirements: Hybrid, Cardiff, United Kingdom

About the role

• Senior Java Developer developing event-driven microservices for maritime surveillance technology. Focusing on scalable systems and API development within a hybrid work environment.

Responsibilities

• Design, implement, and maintain ~50+ Java Spring Boot microservices forming the core of our event-driven platform.
• Build scalable message processing pipelines consuming RabbitMQ queues carrying AIS and other sensor data.
• Optimise services for throughput, reliability, horizontal scaling, and low-latency processing.
• Implement robust CRUD REST APIs for internal and customer-facing features of the MDA system.
• Ensure API consistency, predictability, versioning, and documentation.
• Collaborate closely with UI teams to define data models and integration flows.
• Model relational data structures optimised for high-ingest, analytical workloads.
• Write efficient SQL queries, schema migrations, and performance optimisations.
• Ensure data correctness under concurrent, distributed write loads.
• Contribute to system architecture design and long-term platform evolution.
• Promote best practices around testing, code quality, monitoring, and observability.
• Mentor mid-level and junior engineers and provide guidance on coding standards and design patterns.

Requirements

• Strong experience building production back-end systems.
• Strong expertise in Java and Spring Boot.
• Experience with event-driven architectures and message brokers (RabbitMQ or similar).
• Proficiency with MariaDB, MySQL or other RDBMS, including schema design and SQL optimisation.
• Solid understanding of distributed systems concepts.
• Experience designing and implementing REST APIs.
• Familiarity with containerised deployment, specifically Docker (we do not use Kubernetes).
• Strong debugging skills in complex, multi-service environments.
• Excellent communication skills and ability to work with cross-functional teams.

Benefits

• Matched pension contributions up to 5%
• 25 days annual leave (rising to 28 with service)
• Private health care
• Flexible working opportunities
• Development and training programmes