Job Overview

Key Responsibilities

1. Java Backend Development

• Develop, maintain, and enhance backend services using Core Java and advanced Java concepts.
• Work on GPS/IoT device communication servers and real-time data processing.
• Implement device communication protocols, packet parsing, decoding, and acknowledgment mechanisms.
• Write clean, reusable, maintainable, and thread-safe code.
• Debug existing code and resolve functional and performance-related issues.

2. Multithreading and Concurrency

• Develop multithreaded applications for handling concurrent device connections and data processing.
• Work with threads, ExecutorService, thread pools, synchronization, and concurrent collections.
• Identify and resolve race conditions, deadlocks, resource leaks, and thread-safety issues.
• Ensure safe server reinitialization and configuration updates without data loss or service interruption.

3. TCP/IP, MQTT, and Kafka

• Work with TCP/IP sockets and network communication for GPS devices.
• Develop and maintain MQTT-based communication and message-processing services.
• Work with Apache Kafka for asynchronous data processing, topics, partitions, and consumers.
• Troubleshoot connection failures, message-processing delays, consumer lag, and acknowledgment issues.
• Implement appropriate error handling, retry mechanisms, and resource cleanup to improve reliability.

4. Production Support and Performance Optimization

• Investigate and resolve production issues related to high CPU and memory usage, socket connections, and file descriptor exhaustion.
• Analyze Java thread dumps, heap dumps, application logs, and JVM metrics.
• Troubleshoot CLOSE_WAIT connections, connection leaks, and application hangs.
• Perform root cause analysis and implement permanent fixes for recurring issues.
• Support application monitoring, performance tuning, and server stability improvements.

5. Database Development

• Develop and optimize MySQL queries, joins, indexes, and database transactions.
• Troubleshoot slow queries using EXPLAIN and execution plans.
• Work with JDBC and connection pools such as HikariCP.
• Optimize database interactions for high-volume GPS data processing.

6. Code Quality and Team Collaboration

• Follow coding standards, object-oriented design principles, and software development best practices.
• Participate in code reviews, debugging, testing, and deployment activities.
• Collaborate with senior developers, QA engineers, and DevOps teams.
• Document technical changes, defects, and root cause analysis findings.

Required Technical Skills

• 2–4 years of hands-on experience in Java development.
• Strong knowledge of Core Java, OOP, collections, exception handling, and JVM fundamentals.
• Practical understanding of multithreading, synchronization, and concurrent programming.
• Knowledge of TCP/IP, socket programming, and client-server communication.
• Working knowledge of MQTT and Apache Kafka.
• Experience with MySQL, SQL queries, indexing, and query optimization.
• Familiarity with Linux commands, logs, process monitoring, and network troubleshooting.
• Experience with Maven or Gradle and Git.
• Good debugging, analytical, and problem-solving skills.

Good to Have

• Experience in GPS tracking, telematics, IoT, or real-time data-processing systems.
• Familiarity with Netty, Spring Boot, REST APIs, or RabbitMQ.
• Understanding of Docker, monitoring tools, and automated service recovery.
• Experience troubleshooting production issues in distributed applications.

Educational Qualification

Candidate Expectations

• Ability to understand existing code and independently troubleshoot assigned technical issues.
• Strong focus on code quality, system stability, and data integrity.
• Willingness to learn device communication protocols and complex backend workflows.
• Ability to work collaboratively and take ownership of assigned modules.