Castler

Backend Developer Intern

InternshipIn OfficeMohali, Punjab6 months40K/mo3 openingsImmediate / Rolling

About this internship

Castler has an open Backend Developer Intern position in Mohali for motivated freshers and final-year students. You will work on live backend engineering projects and finish with something you can genuinely talk about in interviews. About the role As a Backend Developer Intern at Castler, your…

Skills you'll use

Node.js / Java / PythonREST APIsSQL (MySQL / PostgreSQL)MongoDBAuthentication & AuthorisationCachingGitUnit TestingLinuxAPI Documentation

What you'll do

Work on writing APIs, data models and background jobs that power the product alongside the core team
Apply Node.js / Java / Python, REST APIs, SQL (MySQL / PostgreSQL), MongoDB 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/BCA/MCA — 2026 freshers & final-year students welcome
Working knowledge of Node.js / Java / Python, REST APIs, SQL (MySQL / PostgreSQL) (or a genuine willingness to learn them)
Strong fundamentals in your discipline and clear problem-solving ability
Care with detail and the discipline to document your work
Clear written and verbal communication in English
Based in or willing to work from Mohali, Punjab

Perks & benefits

Networking with senior professionalsInternship CertificateLetter of RecommendationMentorship from a named mentorLive project experience

Interview & selection process

3 rounds — typical selection flow for this role:

1Application screening & resume shortlisting by the talent team
2Practical assignment or case study with a short walkthrough
3HR discussion — stipend, start date, expectations and offer

About Castler

Castler operates in the escrow banking sector and has an active presence in Mohali. 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 work…

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