Work on high-impact JavaScript libraries, develop reusable code, and optimize applications for maximum speed and scalability. This internship is for those who love writing clean vanilla JavaScript and enjoy solving real-world frontend challenges. As a JavaScript intern at Wingify, you will contribute to user-facing features and optimize applications for maximum speed and scalability.
Key Highlights
Key Responsibilities
Technical Skills Required
Benefits & Perks
Nice to Have
Job Description
Internship – JavaScript
At Wingify, you’ll work on high-impact JavaScript libraries that power experiences for millions of users globally. These libraries form the backbone of VWO’s core features, making performance, scalability, and reliability absolutely critical.
If you love writing clean vanilla JavaScript, obsess over web performance, and enjoy solving real-world frontend challenges—this role is for you.
What You’ll Work On
- Build and enhance core JavaScript libraries used across customer websites
- Write reusable, modular code that scales across multiple products
- Develop high-performance frontend solutions with a strong focus on speed and efficiency
- Contribute to user-facing features that directly impact end users
- Optimize applications for maximum speed, scalability, and cross-browser compatibility
- Write and maintain automation tests to ensure code quality
- Debug complex issues across environments and browsers
Tech Stack
We love modern tooling and best practices:
- Vanilla JavaScript (core focus)
- TypeScript
- Rollup.js
- Cypress
- ESLint
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We are deeply focused on Web Performance – check out some of our work here:
https://engineering.wingify.com/posts/performance-improvements-in-vwo-smart-code/
What We’re Looking For
- 0–1 year of experience (freshers welcome)
- Strong fundamentals in JavaScript, HTML, and CSS
- Passion for vanilla JavaScript and frontend engineering
- Understanding of modular code design and reusable components
- Strong debugging and problem-solving skills
- Awareness of browser differences and compatibility challenges
- Interest in performance optimization and fast-loading web experiences
- Passion for writing clean, testable code with automation
- Curiosity to stay updated with the evolving frontend ecosystem
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Bonus Points
- Contributions to open-source projects
- Familiarity with frontend tooling and build systems
- Writing or sharing technical learnings (blogs, GitHub, etc.)
Why Join Us
- Work on real-world problems at scale
- Learn from a team that values engineering excellence and performance
- Opportunity to contribute to open source and engineering blogs
- Build products used by millions globally
Stipend: INR 25,000 Per Month
Duration: Minimum 6 Months
Location: Fully Remote (India)
Immediate Joiners are preferred
Full-Time - Internship Role
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