Cult.fit

SaaS Product Developer Intern (Full Stack)

InternshipHybridKolkata, West Bengal3 months23K/mo13 openingsImmediate / Rolling

About this internship

Cult.fit is hiring a SaaS Product Developer Intern (Full Stack) in Kolkata — a hands-on, mentor-led internship built for students and 2026 freshers who want real exposure to multi-tenant SaaS product development rather than a certificate-only programme. About the role As a SaaS Product Developer…

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Skills you'll use

React.jsNode.js or PythonREST APIsPostgreSQLMulti-Tenancy BasicsRole-Based Access ControlGit & GitHubFeature Flags & ReleasesAutomated TestingProduct Thinking

What you'll do

Work on building product features that must work safely for many customer accounts at once alongside the core team
Apply React.js, Node.js or Python, REST APIs, PostgreSQL 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 M.Sc (Computer Science)
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 React.js, Node.js or Python, REST APIs (or a genuine willingness to learn them)
Exposure to PostgreSQL, Multi-Tenancy Basics, Role-Based Access Control 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

Internship CertificateLetter of RecommendationMentorship from a named mentorLive project experienceExposure to professional tools and workflows

Interview & selection process

2 rounds — typical selection flow for this role:

1Application screening & resume shortlisting by the talent team
2Team-fit / behavioural interview with the team

About Cult.fit

Cult.fit operates in the health & fitness tech 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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