Cognizant

MERN Stack Developer Intern

InternshipIn OfficeKolkata, West Bengal3 months28K/mo3 openingsImmediate / Rolling

About this internship

Cognizant has an exciting internship opening for a MERN Stack Developer Intern in Kolkata, ideal for freshers and final-year students who are eager to learn by doing. Over this internship you will focus on building full-stack JavaScript apps on the MERN stack, collaborate with cross-functional…

Skills you'll use

MongoDBExpress.jsReactNode.jsJavaScriptREST APIsHTML/CSSGitTypeScriptProblem Solving

What you'll do

Build React frontends and Node/Express APIs
Design MongoDB schemas and queries
Implement authentication and CRUD flows
Test and debug across the MERN stack
Ship features through Git and reviews
Document work clearly and act on feedback

Who can apply

Students in their final year and recent graduates (freshers) interested in a MERN Stack Developer Intern role
Freshers looking to build a career in software development
Candidates based in or willing to commute to Kolkata
Career-switchers and self-taught developers who meet the skill requirements
Anyone eager to gain real, mentor-led coding experience

Perks & benefits

Internship Certificate on completionLetter of Recommendation for strong performersHands-on mentorship from experienced engineersReal-world, portfolio-worthy project experiencePre-Placement Offer (PPO) opportunity based on performanceFlexible, learning-focused work environment

Interview & selection process

4 rounds — typical selection flow for this role:

1Online application & resume shortlisting by Cognizant.
2Online coding / aptitude assessment relevant to the MERN Stack Developer Intern role.
3Technical interview — DSA, system fundamentals and a hands-on coding task.
4HR / managerial round — expectations, compensation, availability and offer.

About Cognizant

About Cognizant Cognizant is a leading global professional services company that helps clients modernise technology, reimagine processes and transform experiences. It is one of India's largest IT employers with major delivery centres across Chennai, Hyderabad, Pune and Kolkata. Products &…

Visit Cognizant’s official website ↗

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