Mu Sigma

API Developer Intern

InternshipIn OfficeDelhi, Delhi3 months23K/mo13 openingsImmediate / Rolling

About this internship

Mu Sigma is hiring an API Developer Intern in Delhi — a hands-on, mentor-led internship built for students and 2026 freshers who want real exposure to API engineering rather than a certificate-only programme. About the role As an API Developer Intern at Mu Sigma, your core focus will be building…

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Skills you'll use

REST API DesignJSONNode.js or JavaAuthenticationOpenAPI/SwaggerPostmanSQLError HandlingAPI VersioningGit

What you'll do

Work on building the interfaces between systems, and the versioning discipline that keeps them from breaking alongside the core team
Apply REST API Design, JSON, Node.js or Java, Authentication 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/ECE), BCA/MCA or B.Sc/M.Sc (Computer Science / IT)
Graduating batch 2026 or 2027 — final-year students and recent graduates welcome
60% / 6.0 CGPA and above preferred; strong project work is considered alongside academics
Working knowledge of REST API Design, JSON, Node.js or Java (or a genuine willingness to learn them)
Exposure to Authentication, OpenAPI/Swagger, Postman 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 Delhi, Delhi or willing to work from there for the internship period

Perks & benefits

Exposure to professional tools and workflowsPre-Placement Offer (PPO) opportunityFlexible working hoursNetworking with senior professionalsInternship CertificateStructured onboarding and a formal mentor at a large, established employer

Interview & selection process

3 rounds — typical selection flow for this role:

1Application screening & resume shortlisting by the talent team
2Team-fit / behavioural interview with the team
3HR discussion — stipend, start date, expectations and offer

About Mu Sigma

Mu Sigma operates in the analytics consulting sector and has an active presence in Delhi. 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 distance. The…

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