Java API Developer

As a Java API Developer, you'll be responsible for developing and maintaining robust APIs and web services using Java and Node.js. You'll work with technologies like Spring Boot, design REST and SOAP services, and engage in microservices architecture. Moreover, a strong emphasis is placed on applying TDD principles, ensuring the code's functionality using Junit or Mockito. Collaboration with various technology and business teams is critical, as you’ll be ensuring seamless interactions across platforms.

A successful Java API Developer must have strong skills in Java, Node.js, and experience with frameworks such as Spring and Hibernate. It’s essential to understand cloud principles, especially AWS services, and have hands-on experience with microservices. Proficient SQL skills, familiarity with CI/CD processes, and knowledge of web service testing tools will also set you apart. Critical thinking and the ability to multitask in a demanding environment are key traits you'll need.

Cloud experience is extremely important for our Java API Developer role. We expect candidates to have at least two years of hands-on experience with AWS services such as S3, Lambda, and API Gateway. Understanding cloud-first principles enables developers to build scalable applications efficiently, making this knowledge highly desirable in candidates.

As a Java API Developer with us, you’ll have numerous opportunities to grow your career. Initially, you’ll focus on developing APIs and integrations, but with demonstrated proficiency, you can move into senior developer roles or even leadership positions such as a team lead or project manager. Continuous learning is encouraged, with options for specialized training or roles in cloud architecture or systems design.

Beyond core Java and Node.js, you should be familiar with Spring frameworks, REST and SOAP APIs, and ORM technologies. Knowledge in cloud services like AWS and CI/CD tools such as Jenkins is crucial. Experience with testing tools like Postman and proficiency in SQL will assist you in the role tremendously. Familiarizing yourself with logging and monitoring tools can also be beneficial.

Object-Oriented Programming (OOP) is crucial in Java and API development as it helps in designing modular and reusable code. You can create classes and objects which allow for easy maintenance and scalability of applications. In API development, employing OOP principles can lead to cleaner code and better organization of business logic, which is essential for maintaining robust APIs.

When discussing your experience with designing RESTful web services, highlight specific projects where you implemented REST principles. Describe how you managed resources, used appropriate HTTP methods, and structured your URLs effectively. Detail the tools and frameworks used, such as Spring Boot, and share how you ensured security and performance in your APIs.

Multithreading in Java allows for concurrent processing, improving application efficiency. Discuss how you utilize Java’s threading APIs like Executors or implementing the Runnable interface. Give examples of when you've implemented multithreading successfully and how you managed synchronization and thread safety to avoid issues like deadlocks.

In your response, list specific AWS services you’ve utilized, such as Lambda for serverless architecture, EC2 for scalable computing, and S3 for storage. Provide examples that illustrate how you leveraged these services to build, deploy, or manage APIs, focusing on the benefits gained in performance and scalability.

Discuss the testing frameworks you are familiar with, emphasizing your experience with JUnit and Mockito for unit testing. Provide insights on how you incorporate Test-Driven Development (TDD) in your workflow, including examples of how testing has improved your projects' reliability and maintainability.

Describe how cloud-first principles guide your development decisions, such as leveraging cloud services for scalability and flexibility. Share examples of applications you’ve built or migrated to the cloud, focusing on how this approach benefited performance and resource management.

Choose a project that posed unique challenges, elaborating on the technical hurdles you faced and the solutions you implemented. Highlight your role, collaboration with team members, and any innovative approaches you took to overcome obstacles, demonstrating your problem-solving abilities.

Walk through your debugging process, mentioning tools and techniques you find effective, such as using logging, breakpoints, and analytical tools. Provide a real example where your debugging efforts led to successfully resolving a critical issue.

In your response, describe how CI/CD tools streamline the deployment process, maintain code quality, and enhance collaboration. Specify the tools you’ve used, such as Jenkins or Bamboo, and how they integrate into your workflow for automated testing and delivery.

Discuss several design patterns you've utilized, explaining why specific patterns are suitable for your APIs, such as Singleton for database connections or Observer for event handling. Share how their implementation improved code structure and functionality in your projects.