About Wingify: Wingify is backed by Everstone Capital, a leading global private equity firm with assets under management exceeding USD 8 billion across India and Southeast Asia.
We are a global SaaS company building category-leading products in Digital Experience Platform Founded in India, Wingify is best known for its flagship product VWO (Visual Website Optimizer) — a powerful experimentation and personalization platform used by thousands of brands worldwide.
In 2026, Wingify merged with AB Tasty, creating one of the world’s largest independent experimentation and personalization platforms.
Today, the combined entity:
- Generates $100M+ in Annual Recurring Revenue (ARR)
- Serves 4,000+ customers globally
- Has 800+ employees across North America, Europe, and APAC
- Operates from 11 global offices
- Is valued at approximately $400–500M
As a Lead JavaScript Engineer, you will be required to work on various JavaScript libraries that are served on our customers’ websites thereby impacting millions of users. These libraries are the core of all the features of VWO.
We love vanilla JavaScript and work with cutting-edge technologies like TypeScript, Rollup.js, Cypress, and ESLint.
What You’ll Do:
- Develop and maintain core JavaScript libraries used across our products.
- Own the architecture, development, and maintenance of our core JavaScript libraries.
- Build reusable, modular code to be shared across various JavaScript projects.
- Review code, mentor peers, and set coding standards and best practices for the team.
- Collaborate with Product and Engineering teams to implement features that deliver real value to customers.
- Lead efforts to optimize for speed, size, and reliability—web performance is at the heart of everything we do.
- Write thorough unit and integration tests to ensure cross-browser compatibility and regression-free deployments.
- Contribute to the open-source community by sharing insights, writing blog posts, and participating in discussions about the technologies we use.
What You’ll Bring:
- 5–8 years of experience in JavaScript development, with at least 1–2 years in a lead or senior role.
- Deep expertise in Vanilla JavaScript, with a strong grasp of the browser environment, DOM, and JavaScript APIs.
- Solid experience with TypeScript, HTML, and CSS.
- Comfort with using AI tools to boost productivity and code quality — AI-assisted development is a core expectation in this role.
- Proficiency in build tools and workflows like Rollup.js, ESLint, and modern JavaScript bundling strategies.
- Passion for web performance and a deep understanding of how browsers work under the hood (rendering, layout, events, caching, etc.).
- Strong debugging skills and experience with automated testing frameworks (we use Cypress).
- Experience writing cross-browser compatible code, including support for older browsers where needed.
- Familiarity with advanced JavaScript concepts: Promises, async/await, modularity, data binding, etc.
- A continuous learner who stays up to date with the latest trends and best practices in front-end development.
Why Join Us?
- You’ll work on high-impact products used by global brands and millions of users.
- You’ll be part of a passionate team that truly cares about code quality, performance, and developer experience.
- We foster a transparent, performance-oriented culture with plenty of room for learning and experimentation.
Location: Fully Remote (India)
At Wingify, we are committed to fostering an inclusive and diverse workplace. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, sexual orientation, gender identity, national origin, disability, or any other characteristic protected by applicable laws.