Thermax

Node.js Backend Developer Intern

InternshipIn OfficeKolkata, West Bengal2 months15K/mo9 openingsImmediate / Rolling

About this internship

Join Thermax in Kolkata as a Node.js Backend Developer Intern. This entry-level internship is designed for students and recent graduates who learn best by building, shipping and getting real feedback on Node.js backend and API engineering work. About the role As a Node.js Backend Developer Intern…

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Skills you'll use

Node.jsExpress.jsJavaScript (ES6+)REST APIsMongoDBPostgreSQLAsync ProgrammingJWT & AuthGitAPI Testing (Postman)

What you'll do

Work on building Node.js services, wiring them to a database and keeping them fast under real traffic alongside the core team
Apply Node.js, Express.js, JavaScript (ES6+), REST APIs to live, production-facing problems
Document your work clearly for reviewers and stakeholders
Participate in reviews and act on the feedback you receive
Collaborate across engineering, product, design or business as required
Follow the team's quality, testing and documentation standards

Who can apply

Pursuing or recently completed B.E./B.Tech (CSE/IT), BCA/MCA or B.Sc (Computer Science / IT)
Graduating batch 2026, 2027 or 2028 — final-year students and recent graduates welcome
60% / 6.0 CGPA and above preferred; strong project work is considered alongside academics
Working knowledge of Node.js, Express.js, JavaScript (ES6+) (or a genuine willingness to learn them)
Exposure to REST APIs, MongoDB, PostgreSQL is an advantage
Clear written and verbal communication in English, and care with detail in your work
No prior work experience required — this is a fresher-friendly internship
Based in Kolkata, West Bengal or willing to work from there for the internship period

Perks & benefits

Mentorship from a named mentorLive project experienceExposure to professional tools and workflowsPre-Placement Offer (PPO) opportunityFlexible working hoursStructured onboarding and a formal mentor at a large, established employer

Interview & selection process

2 rounds — typical selection flow for this role:

1Application screening & resume shortlisting by the talent team
2Technical interview on fundamentals and your projects

About Thermax

Thermax operates in the energy & environment engineering sector and has an active presence in Kolkata. Interns here are put on real work from the start, because the team's view is that the fastest way to learn a craft is to practise it under people who already do it well — not to watch it from a…

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