Castler

SDET / Automation Testing Intern

InternshipHybridNavi Mumbai, Maharashtra3 months42K/mo2 openingsImmediate / Rolling

About this internship

Castler is hiring a SDET / Automation Testing Intern in Navi Mumbai — a hands-on, mentor-led internship built for students and 2026 freshers who want real exposure to test automation rather than a certificate-only programme. About the role As a SDET / Automation Testing Intern at Castler, your…

Skills you'll use

Selenium WebDriverJava / PythonTestNG / PyTestAPI Testing (RestAssured)CI/CD (Jenkins)GitCypress / PlaywrightTest Framework DesignDebuggingReporting

What you'll do

Work on automating regression suites and wiring them into CI alongside the core team
Apply Selenium WebDriver, Java / Python, TestNG / PyTest, API Testing (RestAssured) 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 Selenium WebDriver, Java / Python, TestNG / PyTest (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 Navi Mumbai, Maharashtra

Perks & benefits

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

Interview & selection process

3 rounds — typical selection flow for this role:

1Application screening & resume shortlisting by the talent team
2Online aptitude / domain assessment
3HR discussion — stipend, start date, expectations and offer

About Castler

Castler operates in the escrow banking sector and has an active presence in Navi Mumbai. 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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