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Firstsource

MERN Stack Developer Intern

InternshipHybridKolkata, West Bengal5 months13K/mo3 openingsImmediate / Rolling
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About this internship

Firstsource has an open MERN Stack Developer Intern position in Kolkata for motivated freshers and final-year students. You will join a supportive engineering team, take ownership of meaningful web features, and grow the practical skills employers actually look for. As a MERN Stack Developer…

Skills you'll use

MongoDBExpressReactNode.jsJavaScriptREST APIs

What you'll do

  • building React front-ends
  • creating Express / Node.js APIs
  • designing MongoDB schemas
  • shipping features end to end
  • Collaborate with the team and document your work
  • Take ownership of assigned web features and act on code-review feedback

Who can apply

  • Pursuing or recently completed a degree in CS / IT / any relevant stream — 2026 freshers & final-year students welcome
  • Foundational knowledge of MongoDB, Express, React (or a strong willingness to learn them)
  • Understanding of HTML, CSS and JavaScript basics; familiarity with Git is a plus
  • Good communication, problem-solving and a genuine eagerness to learn
  • Based in or willing to work from Kolkata
  • A portfolio, personal website or web project you can show (a plus, not mandatory)

Perks & benefits

Mentorship from experienced engineersReal-world web project experienceHands-on with modern web tools & frameworksPre-Placement Offer (PPO) opportunityFlexible working hours

Interview & selection process

2 rounds — typical selection flow for this role:

  1. 1Application screening & resume shortlisting by the talent team
  2. 2Online coding / web-fundamentals assessment (HTML, CSS, JavaScript)

About Firstsource

Firstsource operates in the it services space and actively invests in early-career engineering talent across Kolkata. Its culture is practical and learning-oriented: mentorship, code reviews and real project work are part of everyday life, and interns are treated as genuine members of the…
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