Senior Java Backend Engineer

RekNomics; Chennai District; On-site; Confidential; Full time

Job summary

RekNomics in Chennai invites a Senior Java Developer to design and build scalable, high-performance backend applications. You will work on modern microservices, Spring Boot, and event-driven architectures, delivering systems from design to production.

You will thrive in a fast-paced Agile environment, write clean JUnit-tested code, review designs, and own modules end-to-end. Be prepared for challenges and show a builder mindset, with BE/BTech as the base qualification.

Qualifications

• 5+ years of core Java backend experience.
• Strong in Java, Spring Boot, Microservices, REST APIs.
• Experience with distributed systems and multithreading/concurrency.
• Strong Data Structures and Algorithms (DSA) fundamentals.
• Kafka experience preferred.
• JUnit/unit testing comfort.
• Builder mindset - designed and built systems, not just maintained them.

Responsibilities

• Design and build scalable backend microservices using Java and Spring Boot.
• Architect event-driven systems using Apache Kafka.
• Own modules end-to-end - from design to production deployment.
• Write clean, testable code with JUnit coverage.
• Participate in system design reviews and code reviews.
• Work in a fast-paced Agile product environment.

Skills

Java backend

Spring Boot

Microservices

REST APIs

Multithreading/Concurrency

DSA fundamentals

JUnit

Builder mindset

Education

BE/BTech in any stream

Tools

Kafka

Redis

Docker

Kubernetes

AWS

Job description

Job Description:

We are hiring a Senior Java Developer to design and build scalable, high-performance backend applications. This role is ideal for engineers who enjoy solving complex technical challenges and love building systems from scratch, not maintaining legacy code.

Tasks

What you'll do:

• Design and build scalable backend microservices using Java and Spring Boot
• Architect event-driven systems using Apache Kafka
• Own modules end-to-end - from design to production deployment
• Write clean, testable code with JUnit coverage
• Participate in system design reviews and code reviews
• Work in a fast-paced Agile product environment

Requirements

What we're looking for:

• 5+ years of core Java backend experience
• Strong in Java, Spring Boot, Microservices, REST APIs
• Experience with distributed systems and multithreading/concurrency
• Strong Data Structures and Algorithms (DSA) fundamentals
• Kafka experience preferred
• JUnit/unit testing comfort
• Builder mindset - designed and built systems, not just maintained them
• BE/BTech in any stream

Nice to have:

• Product company background
• Redis, Docker, Kubernetes, AWS exposure
• Active on HackerRank/LeetCode

Immediate joiners and candidates serving notice preferred.