Thermax

Frontend Developer Intern

InternshipIn OfficeMumbai, Maharashtra3 months21K/mo3 openingsImmediate / Rolling

About this internship

Start your career in frontend engineering with Thermax as a Frontend Developer Intern in Mumbai. You will sit with a working team, use the same tools and systems they do, and own a defined piece of work from day one. About the role As a Frontend Developer Intern at Thermax, your core focus will be…

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Skills you'll use

HTML5CSS3JavaScriptReact.jsResponsive DesignGitREST APIsCross-browser TestingWeb AccessibilityPerformance Tuning

What you'll do

Work on building responsive, accessible user interfaces alongside the core team
Apply HTML5, CSS3, JavaScript, React.js 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/B.Sc (CS, IT) — 2026 freshers & final-year students welcome
Working knowledge of HTML5, CSS3, JavaScript (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 Mumbai, Maharashtra

Perks & benefits

Letter of RecommendationMentorship from a named mentorLive project experienceExposure to professional tools and workflowsPre-Placement Offer (PPO) opportunity

Interview & selection process

2 rounds — typical selection flow for this role:

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

About Thermax

Thermax operates in the energy & engineering sector and has an active presence in 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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