Java Developer job description

Job brief

We are seeking a highly skilled Java Developer to join our core engineering team and help us build the next generation of our scalable platform. You will be responsible for developing backend services, refining our distributed architecture, and ensuring our systems can support millions of transactions per day. We value clean code, strong architectural intuition, and a collaborative spirit that seeks to solve complex problems in a fast-evolving technical environment. If you are passionate about Java and eager to drive innovation, we would love to have you on our team.

What is a Java Developer?

A Java Developer is a specialized software engineer responsible for architecting and maintaining robust server-side applications using the Java ecosystem. By leveraging frameworks like Spring Boot, Hibernate, and Jakarta EE, a Java Developer creates the backbone of enterprise-grade systems, handling complex business logic and high-volume data processing. Their expertise is essential in building secure, scalable, and reliable software that drives digital operations across banking, e-commerce, and healthcare sectors.

What does a Java Developer do?

A Java Developer spends their day writing high-quality, thread-safe code, designing microservices architectures, and optimizing Java Virtual Machine (JVM) performance to ensure low-latency system responses. They frequently collaborate with frontend developers to expose RESTful APIs, work alongside QA engineers to implement comprehensive JUnit test suites, and partner with DevOps teams to manage containerized deployments using Docker and Kubernetes. Additionally, they troubleshoot complex production issues, perform memory profiling, and participate in code reviews to maintain long-term technical standards.

Key responsibilities

• Design and implement scalable backend microservices using Java 17+, Spring Boot, and reactive programming paradigms to support high-traffic business requirements.
• Develop and maintain secure RESTful APIs and SOAP web services, ensuring seamless integration with frontend frameworks and third-party enterprise platforms.
• Optimize application performance and memory management by conducting JVM tuning, analyzing heap dumps, and identifying bottlenecks in high-concurrency environments.
• Implement robust database interactions using Hibernate or JPA, ensuring efficient transaction management and complex query optimization for PostgreSQL or Oracle databases.
• Author comprehensive unit and integration tests using JUnit, Mockito, and Testcontainers to maintain high code coverage and support CI/CD release cycles.
• Collaborate with architects and engineering leads to design distributed system components, message queues (Kafka/RabbitMQ), and caching layers like Redis.
• Execute security best practices by implementing OAuth2, JWT authentication, and mitigating common vulnerabilities within the application layer.
• Provide technical mentorship to junior developers through thorough pull request reviews, documentation of system architecture, and knowledge-sharing sessions.

Requirements and skills

• Bachelor’s degree in Computer Science, Software Engineering, or a related technical discipline with 4+ years of professional backend development experience.
• Expert-level proficiency in Java SE/EE, including deep understanding of concurrency, multi-threading, collections, and reflection.
• Hands-on experience building and deploying cloud-native applications using AWS (Lambda, EKS, RDS) or Azure, including familiarity with Terraform.
• Proven capability in developing and consuming RESTful APIs using Spring Boot, with strong knowledge of JSON/XML data serialization.
• Extensive experience with relational database systems (PostgreSQL, MySQL) and ORM frameworks such as Hibernate or MyBatis.
• Advanced knowledge of build and automation tools including Maven or Gradle, and proficiency in version control workflows using Git/GitHub.
• Familiarity with containerization and orchestration technologies, specifically Docker and Kubernetes, for managing microservice lifecycles.
• Strong technical communication skills, with the ability to translate complex system requirements into actionable development tasks for cross-functional stakeholders.

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