core Java backend/system-level developer

Job Description (JD)  – Must Have (Core Skills) ·        Strong Core Java developer (minimum Java 1.8; current work in Java 17/21) ·        Strong command of: o   OOP concepts o   Java Collections o   Exception handling o   Multithreading & concurrency (locks, executors, sync, thread pools) o   Experience in inter‑service communication (REST, TCP, messaging) ·        Experience with: o   ZMQ for TCP-based communication o   HTTP‑based communication in Python (or any other language) components ·        Ability to work independently with minimal supervision ·        Hands-on experience with Caching, memory optimization and maintaining latest data in temp & process memory ·        Experience in distributed messaging systems ·        Comfort working in Linux environments   Good to Have ·        Working knowledge of Python ·        Experience with Job Scheduler ·        Familiarity with ReactJS (only optional, front-end exposure) ·        Experience with CI/CD pipelines and Agile methodology ·        Exposure to low‑latency applications   Not Required No requirement for Spring, Spring Boot, Hibernate or ORM experience.