Java Developer

Data Core Systems; Kolkata District; On-site; INR 1,500,000 - 2,100,000; Full time

Job summary

Data Core Systems in Kolkata is seeking a Senior Full Stack Developer to build scalable web and mobile applications with strong backend, API, and cloud expertise. You will own important components and contribute to end-to-end product development.

The role emphasizes architecture, engineering best practices, and mentorship, enabling you to lead critical initiatives within a collaborative team.

Qualifications

• Bachelors degree in Engineering / Computer Science / IT or related discipline.
• 810 years of experience in full stack and backend application development.

Responsibilities

• Design, develop, and maintain scalable backend systems, APIs, and enterprise applications.
• Contribute to application architecture, technical design, and scalable solution development for web and mobile platforms.
• Develop robust applications using Node.js, Java, Spring Boot, React.js, and related frameworks.
• Build and optimize REST APIs, microservices, and third-party integrations.
• Collaborate with frontend, QA, DevOps, and product teams for smooth project execution and delivery.
• Participate in architecture discussions, code reviews, debugging, and performance optimization activities.
• Work on AWS/cloud infrastructure deployment, monitoring, and optimization.
• Design and optimize database schemas, queries, and integrations across MySQL/PostgreSQL environments.
• Ensure engineering best practices, code quality, scalability, maintainability, and security standards.
• Handle production issues, performance bottlenecks, and technical troubleshooting.
• Mentor junior developers and contribute to continuous capability improvement within the team.
• Stay updated with evolving technologies, frameworks, and modern development practices.

Education

Bachelor's degree in Engineering / Computer Science / IT or related discipline

Tools

Node.js

Java

Spring Boot

React.js

REST APIs

Microservices

Job description

Role Overview

We are looking for an experienced Senior Full Stack Developer with

expertise and good architectural/design understanding to build scalable, secure, and high performance

web and mobile applications.

The ideal candidate should possess deep hands-on expertise in backend technologies, API

development, cloud infrastructure, system design, and modern frontend frameworks. The role

requires strong ownership, analytical capability, and the ability to contribute to scalable

architecture, engineering best practices, and end-to-end product development.

Key Responsibility

Design, develop, and maintain scalable backend systems, APIs, and enterprise applications.

Contribute to application architecture, technical design, and scalable solution development for

web and mobile platforms.

Develop robust applications using Node.js, Java, Spring Boot, React.js, and related frameworks.

Build and optimize REST APIs, microservices, and third-party integrations.

Collaborate with frontend, QA, DevOps, and product teams for smooth project execution and

delivery.

Participate in architecture discussions, code reviews, debugging, and performance optimization

activities.

Work on AWS/cloud infrastructure deployment, monitoring, and optimization.

Design and optimize database schemas, queries, and integrations across MySQL/PostgreSQL

environments.

Ensure engineering best practices, code quality, scalability, maintainability, and security

standards.

Handle production issues, performance bottlenecks, and technical troubleshooting.

Mentor junior developers and contribute to continuous capability improvement within the

team.

Stay updated with evolving technologies, frameworks, and modern development practices.

Position: Senior Full Stack Developer / Senior Backend Developer

Experience: 8-10 Years

Location: Kolkata

Role Overview

We are looking for an experienced Senior Full Stack Developer with strong backend development

expertise and good architectural/design understanding to build scalable, secure, and highperformance

web and mobile applications.

The ideal candidate should possess deep hands-on expertise in backend technologies, API

development, cloud infrastructure, system design, and modern frontend frameworks. The role

requires strong ownership, analytical capability, and the ability to contribute to scalable

architecture, engineering best practices, and end-to-end product development.

Required Qualification

Bachelors degree in Engineering / Computer Science / IT or related discipline.

810 years of experience in full stack and backend application development.

Strong hands-on expertise in:

• Node.js


• Java


• Spring Boot


• React.js


• REST APIs


• Microservices