Lập trình viên Backend (Java)

At least 1 year of experience in backend development using Java Spring Boot (Spring Web/MVC, Data JPA, Validation). Experience in designing and developing RESTful APIs using Swagger/OpenAPI, Postman. Basic knowledge of PostgreSQL (table design, JOINs, transactions, indexing). Proficiency in Git and ability to work in a basic Linux environment. Ability to build/run Spring Boot JAR applications, with knowledge of reverse proxy (Nginx/Apache) or embedded Tomcat. [Preferred] Experience configuring Apache/Nginx and managing Tomcat. [Preferred] Knowledge or hands-on experience with CMC Cloud or other cloud platforms; familiarity with Docker. [Preferred] Ability to collaborate with frontend teams (Next.js) in handling CORS, user authentication flows, and logging/monitoring. [Preferred] Experience using Redis/cache, message queues, and writing JUnit/MockMvc for unit testing.