API Developer Intern

About this internship

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Skills you'll use

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, 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 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

Interview & selection process

2 rounds — typical selection flow for this role:

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

About Calpion

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