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Fintso logo — Fintso Kotlin Backend Developer Intern at Fintso
Fintso

Kotlin Backend Developer Intern

InternshipHybridKolkata, West Bengal3 months18K/mo15 openingsImmediate / Rolling
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About this internship

Fintso is hiring a Kotlin Backend Developer Intern in Kolkata — a hands-on, mentor-led internship built for students and 2026 freshers who want real exposure to Kotlin server-side engineering rather than a certificate-only programme. About the role As a Kotlin Backend Developer Intern at Fintso…

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Skills you'll use

KotlinSpring BootCoroutinesREST APIsSQLGradleJUnit / MockKGitJVM FundamentalsClean Code

What you'll do

  • Work on building server-side Kotlin services and learning how a modern JVM stack fits together alongside the core team
  • Apply Kotlin, Spring Boot, Coroutines, 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)
  • 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 Kotlin, Spring Boot, Coroutines (or a genuine willingness to learn them)
  • Exposure to REST APIs, SQL, Gradle 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

Exposure to professional tools and workflowsPre-Placement Offer (PPO) opportunityFlexible working hoursNetworking with senior professionalsInternship CertificateBroad ownership and direct exposure to founders and senior decision-makers

Interview & selection process

3 rounds — typical selection flow for this role:

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

About Fintso

Fintso operates in the wealth technology 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 distance. The…
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