Job Title: Senior Java Backend Engineer Experience: 5–7 Years Location: Bangalore/Hybrid/Remote Role Overview We are looking for a hands-on Senior Java Backend Engineer experienced in building scalable, high-performance enterprise applications. The candidate should have strong expertise in Java, Spring Boot, PostgreSQL and MongoDB, with proven experience handling large datasets, concurrent users, batch processing and performance-sensitive APIs. Key Responsibilities Develop scalable backend applications and REST APIs using Java and Spring Boot. Design and optimize systems handling millions of records and concurrent users. Optimize PostgreSQL queries, joins, indexes, execution plans, transactions, locks and connection pools. Design efficient PostgreSQL and MongoDB data models. Implement pagination, batch processing, bulk operations, partitioning, archiving and asynchronous processing. Develop fault-tolerant batch jobs that can restart or resume after failure. Identify and resolve perform...