Senior Java Developer

Bahwan CyberTek; Chennai District; On-site; INR 800,000 - 1,200,000; Full time

Job summary

Bahwan CyberTek is seeking an experienced Core Java Developer based in Chennai. The ideal candidate will possess strong expertise in Core Java (Java 8 or above) and backend development.

Candidates should have hands-on experience with databases, particularly PostgreSQL, including schema design and performance tuning. Knowledge of RESTful, SOAP web services, and messaging protocols such as MQTT is essential.

Qualifications

• 5+ years of experience with Core Java and backend development.
• Strong familiarity with PostgreSQL database optimizations and complex SQL queries.
• Experience in building microservices and proficiency with messaging protocols.

Skills

Core Java (Java 8 or above)

PostgreSQL

REST APIs

SOAP-based services

MQTT

OOP

design patterns

Tools

Maven

Gradle

Git

Job description

We are looking for an experienced Core Java Developer with strong backend development expertise and hands‑on experience in PostgreSQL, MQTT, RESTful and SOAP‑based web services.

Core Skills

• Strong expertise in Core Java (Java 8 or above) — including Collections, Streams, Concurrency, Exception Handling, and Generics.
• Excellent understanding of OOP, design patterns, and data structures.
• Proficient in building and consuming REST APIs using frameworks like Spring Boot or JAX‑RS.
• Experience with SOAP‑based services (JAX‑WS, Apache CXF, or similar).

Database

• Strong working experience with PostgreSQL (schema design, optimization, indexes, stored procedures).
• Proficiency in writing complex SQL queries and performance tuning.

Messaging / IoT

• Experience with MQTT protocol for lightweight messaging or IoT applications (HiveMQ, Eclipse Paho, EMQX, etc.).
• Familiarity with asynchronous and event‑driven programming.

Other Technical Competencies

• Knowledge of Maven/Gradle, Git, and CI/CD tools.
• Familiarity with JSON, XML, and serialization/deserialization mechanisms.
• Understanding of microservices architecture and deployment best practices.
• Working knowledge of Linux‑based environments.