Job Description

Job Title: Senior Java Backend Engineer

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Experience: 5–7 Years

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Location: Bangalore/Hybrid/Remote

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Role Overview

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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.

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Key Responsibilities

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- Develop scalable backend applications and REST APIs using Java and Spring Boot.
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- Design and optimize systems handling millions of records and concurrent users.
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- Optimize PostgreSQL queries, joins, indexes, execution plans, transactions, locks and connection pools.
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- Design efficient PostgreSQL and MongoDB data models.
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- Implement pagination, batch processing, bulk operations, partitioning, archiving and asynchronous processing.
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- Develop fault-tolerant batch jobs that can restart or resume after failure.
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- Identify and resolve performance issues across the application, database and JVM layers.
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- Prevent API timeouts and connection-pool exhaustion during heavy operations.
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- Participate in architecture discussions, code reviews and technical mentoring.
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- Troubleshoot application and database performance issues in production.
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Required Skills

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- 5–6 years of backend development experience.
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- Strong hands-on expertise in Java 8+/17/21 and Spring Boot.
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- Spring Data JPA/Hibernate, REST APIs and transaction management.
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- Strong PostgreSQL knowledge, including complex SQL, EXPLAIN ANALYZE, indexing, partitioning, locking and performance tuning.
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- Working experience with MongoDB, including data modelling, aggregation, indexing and bulk operations.
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- Experience processing millions of records using batch, chunk-based, paginated or streaming approaches.
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- Good understanding of multithreading, concurrency, asynchronous processing and memory-effective application design.
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- Experience with Spring Batch or an equivalent framework.
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- Strong debugging, problem-solving and production-support capabilities.
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Preferred Skills

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- AWS: RDS, EC2, S3 and ALB/NLB.
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- Redis or similar caching technologies.
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- Kafka, RabbitMQ or another messaging platform.
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- Docker, CI/CD, monitoring and observability tools.
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- JVM profiling and performance tuning.
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- Experience working on high-volume enterprise applications.
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Ideal Candidate

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We need a hands-on engineer who can independently solve database and application performance challenges, design reliable high-volume processing solutions, and take technical ownership in a growing product-based organization.

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📌 Senior Sr. Engineer: Java Backend Developer (Bengaluru)
🏢 ezAtlas
📍 Bengaluru