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# Mid & Senior Java Developers

- **Company:** MCS Group
- **Location:** Belfast, UK
- **Experience:** Experienced
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Amazon Web Services, Automation of Tests, Microsoft Azure, Cloud Engineering, Continuous Integration, Software Design Patterns, Distributed Systems, Github, Hibernate (Java), Object-Oriented Software Development, Secure Coding, Datadog, Spring-boot, Solid Principles, Apache Kafka, Restful APIs, Amazon Simple Queue Service (SQS), Serverless Computing, Jenkins
- **Published:** August 21, 2026
- **Apply:** https://www.nijobfinder.co.uk/job/2050799/mid-and-senior-java-developers/

## About the Role

* Strong commercial Java development experience.
 * Experience with Spring or Spring Boot.
 * A good understanding of object-oriented development, SOLID principles and common design patterns.
 * Experience designing and developing REST APIs.
 * Knowledge of automated testing and secure coding practices.
 * Experience with CI/CD tools such as Jenkins, GitHub Actions or similar.
 * Experience with AWS, Azure or GCP.
 * Strong communication skills and the ability to explain technical decisions clearly.

## Description

MCS Group is working with a major technology-led organisation as it builds a new engineering capability in Belfast. This is a significant period of growth, with multiple opportunities available for experienced Java Developers across mid-level, senior and technical leadership grades.You will join a collaborative engineering environment, delivering modern software solutions for large, complex projects. The work offers plenty of technical variety, combining hands-on development with opportunities to influence design, improve engineering practices and support other developers.The role

 * Design and build scalable backend applications and services using modern Java.
 * Develop secure REST APIs and integrations for complex, business-critical platforms.
 * Help modernise existing systems and move applications towards cloud-native architectures.
 * Contribute to technical design, architecture discussions and engineering standards.
 * Build automated tests and support applications from development through to production.
 * Diagnose performance issues and resolve complex live-service incidents.
 * Work alongside engineers, architects, testers and non-technical stakeholders.
 * At the more senior level, provide technical direction, mentor developers and take ownership of delivery.


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