Johannesburg: Senior Java EE Developer posted by Sabenza IT & Recruitment

We are looking for an experienced Senior Java EE Developer with 7+ years of hands-on enterprise Java development experience. The ideal candidate will have a strong background in building secure, scalable, and high-performance backend systems within complex enterprise environments. You will contribute to solution architecture, lead development efforts, and collaborate across multidisciplinary teams to deliver robust business applications.

Key Responsibilities:

• Design, develop, and maintain enterprise-grade backend applications using Java EE/Jakarta EE standards.
  
• Build and optimize APIs, microservices, and integration layers using frameworks such as Spring / Spring Boot, JAX-RS, JPA, EJB, Hibernate.
  
• Develop and maintain high-performance server-side components and batch processing workflows.
  
• Implement unit tests, integration tests, and ensure code quality through best practices and standards.
  
• Participate in solution architecture design sessions for new and existing systems.
  
• Contribute to the design of scalable, modular, and resilient backend architectures.
  
• Identify performance bottlenecks and recommend system improvements.
  
• Work with relational databases such as PostgreSQL, Oracle, MySQL, SQL Server.
  
• Develop efficient SQL queries, stored procedures, and ORM mappings.
  
• Ensure data integrity, performance, and security.
  
• Integrate systems using REST, SOAP, JMS, Kafka, or other messaging platforms.
  
• Develop and maintain middleware components and enterprise integration patterns (EIP).
  
• Work with CI/CD pipelines (Jenkins, GitHub Actions, GitLab CI, Azure DevOps, etc.).
  
• Build containerized services using Docker; experience with Kubernetes is a plus.
  
• Experience deploying Java applications in AWS, Azure, or on-premise environments.
  
• Familiarity with infrastructure automation/configuration tools is considered an advantage.
  
• Implement application security best practices (authentication, authorization, OWASP standards).
  
• Work with identity providers (OAuth2, SSO, JWT, Keycloak, Azure AD, etc.).
  
• Lead development streams and mentor junior developers.
  
• Conduct code reviews and enforce development standards.
  
• Work closely with business analysts, testers, and product owners.
  

Requirements

• 7+ years enterprise Java development experience (required).
  
• Strong experience in Java EE/Jakarta EE, Spring, Spring Boot, and ORM frameworks.
  
• Solid understanding of REST APIs, microservices architecture, and enterprise integration.
  
• In depth AWS experience with experience encompassing services like API Gateway, EC2, Lambda, etc.
  
• Strong SQL and database design experience.
  
• Experience with message brokers (JMS, Kafka, RabbitMQ) and service-oriented architectures.
  
• Experience with Git and CI/CD automation.
  
• Experience deploying and monitoring Java applications in cloud or hybrid environments.
  
• Experience with Kubernetes / OpenShift, Apache Camel, MuleSoft, or other integration frameworks
  
• Monitoring tools (Prometheus, Grafana, ELK, Splunk)
  
• Caching frameworks (Redis, Hazelcast)
  
• Cloud certifications (AWS, Azure, GCP) are beneficial.