Mern Stack Developer

Vlink; Kolkata District; On-site; INR 900,000 - 1,500,000; Full time

Job summary

Vlink is seeking a Senior Full Stack Developer on a contractual basis to design, build, and maintain scalable web applications and backend services. The role emphasizes proficiency in JavaScript, ReactJS, NodeJS/ExpressJS, and MongoDB, with comfort using AI-assisted development tools to boost productivity and quality.

The candidate should independently deliver features, collaborate with cross-functional teams, and ensure robust, secure APIs while adhering to engineering best practices and modern

Qualifications

• Strong proficiency in JavaScript and ReactJS.
• Solid backend experience with NodeJS/ExpressJS and MongoDB.
• Good understanding of REST APIs, authentication, and integrations.
• Familiarity with Git, CI/CD workflows, and agile practices.
• Awareness of AI-assisted development tools and responsible usage.

Responsibilities

• Design, develop, and maintain scalable web apps using ReactJS and NodeJS.
• Build robust APIs and backend services with ExpressJS.
• Work with MongoDB for schema design, queries, and optimization.
• Collaborate with product, design, QA, and engineering teams to deliver features on time.
• Use AI-assisted tools for coding, debugging, refactoring, and test generation.
• Be aware of tools like Cursor, ChatGPT, code review assistants, and automation harnesses.
• Review code and guide junior developers; follow engineering best practices.
• Troubleshoot production issues and improve performance and scalability.

Skills

JavaScript

ReactJS

NodeJS/ExpressJS

MongoDB

REST APIs

AI-assisted development tools

Debugging

Problem-solving

Communication

Tools

Git

CI/CD

Job description

. Senior Software Engineer ::

Role Overview

We are looking for a Senior Full Stack Developer on a contractual basis with strong experience in JavaScript, ReactJS, NodeJS/ExpressJS, and MongoDB. The candidate should be able to independently design, build, and maintain scalable web applications and backend services.

They should also be comfortable using AI-assisted development tools to improve productivity, code quality, testing, and documentation.

Key Responsibilities

• Design, develop, and maintain scalable web applications using ReactJS and NodeJS.
• Build robust APIs and backend services using ExpressJS.
• Work with MongoDB for schema design, queries, optimization, and data modelling.
• Collaborate with product, design, QA, and engineering teams to deliver features within agreed timelines.
• Use AI-assisted development tools for coding, debugging, refactoring, documentation, and test generation.
• Stay aware of tools such as Cursor, ChatGPT, code review assistants, and automation/test harnesses.
• Review code, guide junior developers where needed, and follow engineering best practices.
• Troubleshoot production issues and improve application performance, reliability, and scalability.

Required Skills

• Strong proficiency in JavaScript and ReactJS.
• Strong backend development experience - NodeJS and ExpressJS and Mongo.
• Good understanding of REST APIs, authentication, authorization, and third-party integrations.
• Familiarity with Git, CI/CD workflows, and agile development practices.
• Practical awareness of AI-assisted development tools and responsible usage in software delivery.
• Strong problem-solving, debugging, and communication skills.