Senior Java Backend Engineer

Senior Java Backend Engineer

Location: Burgess Hill, UK

Work Arrangement: Hybrid – 3 days onsite per week

Job Type: Contract/Permanent

Role Overview

We are looking for a Senior Java Backend Engineer to design, develop, maintain, and optimize robust server-side applications. The ideal candidate will have strong software engineering fundamentals, experience working with legacy systems, and a passion for writing clean, scalable, and maintainable code.

Key Responsibilities

• Design, develop, refactor, and maintain server-side applications.
• Write clean, efficient, and testable code.
• Develop and maintain unit tests and troubleshoot production issues.
• Analyze and optimize application performance.
• Work with asynchronous programming and backend services.
• Contribute to Continuous Integration (CI) and build processes.
• Modernize and maintain legacy codebases.
• Integrate with bespoke backend services and APIs.
• Design effective solutions for complex and open-ended problems.
• Collaborate effectively within a cross-functional engineering team.
• Contribute to open-source initiatives where applicable.

Required Skills & Experience

• Strong experience in Java backend development and server-side application engineering.
• Solid understanding of software development, testing, refactoring, and debugging.
• Experience with REST APIs and/or GraphQL (GQL).
• Experience with Gradle or similar build tools.
• Good understanding of CI/CD practices.
• Experience working with legacy systems and complex backend environments.
• Strong problem-solving and performance optimization skills.
• Self-motivated with the ability to work independently and collaboratively.
• Bachelor’s degree in Computer Science, Engineering, or a related field, or equivalent practical experience.

Technologies

• Java
• Kotlin
• Gradle
• REST
• GraphQL (GQL)
• RAML
• CI/CD
• Unit Testing
• Asynchronous Programming