Java Developer

Position: Java Developer (Spring Boot)

Experience: 4+ years

Number of Positions: 1

About the Role

We need a Java Developer with 4+ years of hands-on experience to build and maintain backend services for our enterprise and industrial automation projects. The role involves working on Spring Boot applications backed by MySQL, along with socket-based integrations with field devices (weighbridges, sensors, controllers) and third-party systems. Strong fundamentals are valued over a long list of frameworks.

Must-Have Skills

• Core Java: Java 8 or above collections, generics, streams, exception handling, and a working understanding of multi-threading and concurrency (Runnable, Executor Service, synchronization).
• Spring Boot: Building REST APIs, dependency injection, Spring MVC, Spring Data JPA / Hibernate, configuration through application.yml / application.properties, and profiles.
• MySQL: Writing efficient SQL queries, joins, indexes, basic schema design, ORM mapping with JPA, and transaction handling.
• Socket Programming: Hands-on with java.net.Socket and ServerSocket, TCP/IP client and server implementations, persistent connections, framing and parsing custom byte/text protocols, and basic threading for concurrent connections.
• Build & Version Control: Maven or Gradle, Git.
• Debugging: Reading logs, using IDE debuggers, basic profiling, and troubleshooting connectivity and performance issues.

Nice to Have

• Industrial protocols: Modbus TCP/RTU, OPC UA, MQTT.
• Apache HttpClient, RestTemplate, or WebClient for external integrations.
• Apache Kafka or other message brokers.
• Unit testing with JUnit and Mockito.
• Basics of Linux command line and Docker.
• Exposure to Azure App Services or AWS deployments.
• Swagger / OpenAPI documentation.

Key Responsibilities

• Develop and maintain Spring Boot microservices and REST APIs.
• Design and optimize MySQL schemas, queries, and indexes.
• Implement and maintain socket-based integrations with hardware devices and external systems.
• Handle connection lifecycle — timeouts, retries, reconnection, heartbeats — for long-running TCP integrations.
• Write clean, well-documented, and testable code.
• Participate in code reviews, debugging, and production troubleshooting.
• Collaborate with senior developers, QA, and project managers on sprint deliverables.

Qualifications

• Bachelor’s degree in Computer Science, Information Technology, Engineering, or equivalent.
• 4+ years of relevant Java backend development experience.
• Strong problem-solving skills and willingness to learn industrial and IoT integration patterns.