Sr. Backend Java Developer

Company Description For More Open Positions Visit us at: http://recruiting.woongjininc.com/ Our Mission WOONGJIN INC. is a rapidly growing team who provides a range of unique, exceptional, and enhanced services to our clients. We have a strong moral code that includes the service of goodness without expectations of reward. We are motivated by the sense of responsibility and servant leadership. Benefits Medical Insurance Vision Insurance Dental Insurance 401(k) Paid Sick hours Job Description We are seeking an experienced Java Back-end Developer to join our team. The ideal candidate will be responsible for designing, developing, and maintaining robust and scalable back-end solutions using Java and related technologies. This Senior Developer will work closely with cross-functional teams to deliver high-quality software solutions that meet our business needs. Responsibilities: Design, develop and maintain high quality, production grade and secure RESTful web services and APIs using Java and Spring Framework, while modeling best practices for reliability, testability and operational excellence. Work with Spring Framework modules, including Spring Core, Spring MVC, Spring Security, Spring Data, Spring JDBC, and Spring Batch. Implement database integration using MyBatis, JDBC, Hibernate/JPA, and Oracle SQL. Implement caching mechanisms to improve application performance and scalability. Handle data serialization and deserialization using JSON, XML, Jackson, and other serialization frameworks. Develop and maintain API documentation using SpringFox and Swagger/OpenAPI. Implement real-time communication and integrations using WebSocket. Understand CDN integration, caching strategies, and content delivery optimization. Deploy, configure, monitor, and troubleshoot applications on Apache Tomcat and Oracle WebLogic. Implement application security using OAuth 2.0, JWT, SSO, and SSL/TLS. Develop unit and integration tests and participate in code reviews. Work with Maven, Git/GitHub, Jenkins, and CI/CD pipelines. Integrate and apply AI techniques (LLMs, AI assisted development tools etc.) to improve software engineering workflows, developer productivity and operational efficiency. Participate in production support, performance tuning, debugging, and root-cause analysis. Share your passion for staying on top of tech trends, experimenting and learning new technologies, and mentoring other members of our Engineering team. Qualifications Bachelor's degree in Computer Science, Engineering, or a related field. 5 Plus years of experience in Java back-end development. Proficiency in Java programming language and related frameworks (e.g., Spring, Spring Boot, Spring Batch). Strong understanding of object-oriented programming principles, data structures, and algorithms. Experience with Oracle SQL and database design principles. Proficiency in RESTful web services and API development. Experience with build tools such as Maven. Knowledge of version control systems, particularly Git. Strong knowledge of application servers such as Tomcat and WebLogic. Experience with continuous integration tools such as Jenkins. Familiarity with automated testing frameworks such as JUnit. Understanding of authentication and authorization mechanisms, including OAuth. Knowledge of SOAP web services and related technologies. Strong problem-solving skills and attention to detail. Excellent communication and collaboration skills. Ability to work effectively in a fast-paced, agile environment. Self-motivated, eager to learn, and willing to take on new challenges while actively contributing to team goals. Preferred Qualifications: Experience with other databases such as MySQL, PostgreSQL, or MongoDB. Familiarity with continuous integration/continuous deployment (CI/CD) pipelines. Understanding of software development best practices and design patterns. Experience with Python. Additional Information All your information will be kept confidential according to EEO guidelines.