Job Opportunities Mid-Level Java Developer

Job Duties

We are seeking a skilled Java developer with 3 years experience for our Neftex Technical Services Team. Reporting to the Team Lead you will contribute to the design development and maintenance of subsurface evaluation solutions across the energy sector. Successful candidates will be evidently enthusiastic and motivated people who we can train up in our processes and ultimately play a key role in quality assurance initiatives across different stakeholder groups. Please note although this is a hybrid position you will be required to attend our Abingdon Oxfordshire office a minimum of three days per week.

Minimum Qualifications

• Strong knowledge of Java Core including:
• Collections Framework Generics Streams Lambdas
• Exception handling and best practices
• Multithreading and concurrency (Executors synchronization CompletableFuture)
• Memory management and garbage collection basics
• Object-oriented principles (SOLID design patterns microservice architecture)
• Experience with Java and related frameworks (SpringBoot Eclipse RCP OData Hibernate JPA REST etc.)
• Backend development including REST APIs with Spring Boot Swagger/OpenAPI specifications Spring Security OAuth2/OIDC JWT.
• Git-based workflows and Gitlab CI/CD pipelines.
• Experience working in an Agile development environment (Scrum or Kanban).
• Familiarity with SQL Server PostgreSQL or other relational databases.
• Self-starter with a proactive attitude and ability to learn new technologies quickly.
• Undergraduate degree in Software Engineering Computer Science or a related field.

Preferred Qualifications

• Familiarity with GIS connectors.
• Familiarity with Azure DevOps GitLab and Git-based workflows.
• Experience with CI/CD pipeline automation and deployment scripting.
• Experience with automated testing including unit integration and regression testing.
• Eclipse Plugin development experience including SWT JFace Eclipse OSGi extension points views/editors preferences
• Knowledge of containerization and orchestration (Docker Kubernetes).

Key Responsibilities

• Design develop and maintain desktop and web applications using Java.
• Implement new services features and bug fixes as prioritized by the Product Owner.
• Build and integrate APIs to enable seamless communication between services and components.
• Collaborate with product owners architects and other developers to define requirements and deliver high-quality solutions.
• Participate actively in Agile ceremonies including sprint planning daily stand-ups backlog refinement and retrospectives.
• Write clean maintainable and well-documented code following industry best practices and internal standards.
• Implement automated tests (unit integration and functional) to ensure code quality and reliability.
• Monitor and optimize performance scalability and security.
• Apply and enforce security best practices including:
• Ensuring secure authentication and authorization flows.
• Implementing encryption for data in transit and at rest.
• Validating and sanitizing all inputs to prevent injection attacks.
• Keeping dependencies and libraries up to date to mitigate vulnerabilities.
• Troubleshoot and resolve issues across development staging and production environments.
• Maintain up-to-date knowledge of emerging technologies frameworks and industry trends relevant to day-to-day development.
• Contribute to technical documentation and knowledge sharing across teams.
• Communicate and escalate issues clearly and promptly to relevant stakeholders.

Qualifications