Johannesburg: Lead Java Developer (JHB Onsite) posted by Datafin
Posted on 2025-07-06 00:00:00
| Employer | Datafin |
|---|---|
| Category | Development |
| Location | Gauteng / Johannesburg |
Job Summary
Johannesburg – Gauteng – South Africa
- Design, develop, and maintain complex full-stack applications with a focus on performance, scalability, and maintainability.
- Lead architectural discussions and define technical roadmaps for Java-based backend systems and microservices.
- Mentor Junior Developers and review code to enforce best practices in design patterns, clean code, and testability.
- Collaborate with cross-functional teams to align technical solutions with business objectives.
- Champion the use of Spring Boot and modern frameworks to accelerate development and standardize services.
- Own and improve the CI/CD pipeline, code quality checks, and automated testing strategies.
- Optimize existing systems and troubleshoot performance bottlenecks across large-scale distributed environments.
- Contribute to the design and implementation of cloud-native, containerized applications using Kubernetes and Docker.
- Ensure systems are secure, resilient, and compliant with enterprise-grade SLAs.
- Monitor, analyze, and tune systems using observability tools (e.g., Prometheus, Grafana, ELK).
- Perform other duties as assigned.
- Bachelors Degree in Computer Engineering, Software Engineering, Computer Science, or a related field.
- 6+ Years of hands-on Java development experience, delivering scalable, enterprise-grade applications.
- Expert-level proficiency in Spring Boot and the Spring ecosystem, including Spring Data, Spring Security, and Spring Cloud.
- Proven experience designing and implementing microservices architectures and distributed systems.
- Strong experience with containerization and orchestration using Docker and Kubernetes and deploying scalable solutions on both cloud platforms and on-premises infrastructure.
- Deep knowledge of SQL and NoSQL databases, with proficiency in PostgreSQL, MySQL, and MongoDB, including schema design, indexing, query optimization, and performance tuning.
- Expertise in designing and developing RESTful APIs with secure authentication mechanisms.
- Solid command of DevOps and CI/CD practices, with hands-on use of tools such as Git, Maven, Jenkins, Helm, SonarQube, and monitoring solutions like Prometheus and Grafana.
- Familiarity with infrastructure as code, container security, and SRE principles is a strong plus.
- Experience in performance profiling and testing using tools such as JProfiler, JMeter, and unit/integration test frameworks.
- Exposure to Frontend frameworks like React or AngularJS is a plus for Full Stack collaboration.
- Strong grasp of Agile/Scrum methodologies and Test-Driven Development (TDD).
- Experience in the Telecommunications (Telco) domain including familiarity with network systems, billing platforms, service orchestration.
- French is a plus.
- Demonstrated leadership and mentoring experience, with the ability to guide teams, enforce best practices, and influence technical direction.
- Excellent analytical, communication, and stakeholder management skills.
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