About the Java Developer role
A Java Developer builds and maintains applications that run on the Java Virtual Machine, most often backend services, APIs, and enterprise systems. The work centers on writing object-oriented code, integrating with databases and message queues, and keeping high-traffic services fast and reliable. Java remains the backbone of banking, insurance, telecom, e-commerce, and large-scale SaaS platforms.
The role varies with your architecture. A team running Spring Boot microservices on Kubernetes needs different instincts than a team maintaining a twenty-year-old enterprise application, and both differ from Android-focused Java work. Name your Java version, frameworks, and deployment model in the posting so candidates can judge the fit honestly.
When hiring, prioritize depth over breadth. A developer who genuinely understands the JVM, concurrency, and Spring internals will adapt to any Java codebase, while a long list of framework names on a CV guarantees little. Also state whether the role includes on-call duties or performance tuning, since senior Java candidates ask about both.
Java Developer job description template
Job brief
We are looking for a Java Developer to design, build, and maintain the backend services that power our products. You will develop new features in Java and Spring, write well-tested and maintainable code, tune performance where it matters, and collaborate with frontend, QA, and DevOps colleagues to ship reliably. To succeed in this role, you should have solid object-oriented design skills and real production experience on the JVM. Ultimately, you will keep our core services fast, stable, and ready to scale.
Responsibilities
- Design, develop, and maintain backend services and APIs in Java
- Build features using Spring Boot or comparable frameworks in the team's stack
- Write unit and integration tests with tools such as JUnit and Mockito
- Design and optimize database interactions using JPA, Hibernate, or plain SQL
- Integrate services with message queues, caches, and third-party APIs
- Profile and tune application performance, including memory and garbage collection behavior
- Participate in code reviews and uphold the team's coding standards
- Troubleshoot and resolve production issues in collaboration with DevOps
- Contribute to architectural decisions for new services and major refactors
- Keep dependencies, Java versions, and security patches up to date
Requirements and skills
- Proven work experience as a Java Developer or backend developer on the JVM
- Strong command of core Java, including collections, generics, streams, and concurrency
- Hands-on experience with Spring or Spring Boot in production
- Solid understanding of object-oriented design principles and common design patterns
- Experience with relational databases and ORM tools such as Hibernate or JPA
- Familiarity with build tools such as Maven or Gradle and Git-based workflows
- Experience designing and consuming REST APIs
- Ability to write clear technical documentation and communicate design decisions
- BSc in Computer Science, a related field, or equivalent practical experience
Nice to have
- Experience with microservices, Docker, and Kubernetes
- Familiarity with Kafka, RabbitMQ, or other messaging systems
- Exposure to Kotlin or other JVM languages
- Oracle Certified Professional Java certification or similar credential
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