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Java Backend Developer - W2

Remote · Denmark Full-time

Job Summary We are looking for an experienced Java Backend Developer with strong expertise in designing, developing, and maintaining scalable, secure, and high-performance backend applications. The ideal candidate will have hands-on experience with Java, Spring Boot, REST APIs, microservices, databases, and cloud technologies. Exposure to Artificial Intelligence (AI), Generative AI, and AI-assisted software development tools is a plus. Candidates with an interest in integrating AI capabilities into backend applications will be preferred.

Key Responsibilities

  • Design, develop, test, and maintain scalable backend applications using Java and Spring Boot.
  • Build and maintain RESTful APIs and microservices architectures.
  • Develop clean, reusable, maintainable, and high-quality code following industry best practices.
  • Work with relational and NoSQL databases, including query optimization and data modeling.
  • Implement application security, authentication, authorization, and performance optimization.
  • Integrate backend services with third-party APIs, enterprise systems, and cloud-based applications.
  • Develop unit and integration tests using JUnit, Mockito, and related testing frameworks.
  • Work with CI/CD pipelines, Git, Docker, and cloud platforms to support application deployment.
  • Troubleshoot production issues, perform root-cause analysis, and improve application reliability.
  • Collaborate with architects, product owners, QA engineers, DevOps teams, and other developers in an Agile environment.
  • Leverage AI-assisted development tools, where appropriate, to improve productivity and code quality.

Required Technical Skills

  • Strong hands-on experience with Java 8/11/17 or newer.
  • Expertise in Spring Boot, Spring MVC, and Spring Framework.
  • Experience building REST APIs and microservices.
  • Strong knowledge of object-oriented programming, design patterns, and SOLID principles.
  • Experience with Hibernate/JPA and ORM frameworks.
  • Proficiency in SQL and relational databases such as PostgreSQL, MySQL, or Oracle.
  • Experience with Git and build tools such as Maven or Gradle.
  • Hands-on experience with unit testing using JUnit and Mockito.
  • Understanding of authentication and authorization using OAuth 2.0, JWT, or Spring Security.
  • Familiarity with messaging technologies such as Kafka or RabbitMQ.
  • Experience with Docker, CI/CD, and application monitoring.
  • Strong debugging, analytical, communication, and problem-solving skills.

Nice-to-Have

Skills – AI & Generative AI Candidates with experience in one or more of the following areas will have an added advantage:

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