Senior Software Engineer - JavaScript (Client Side)

As a Senior JavaScript Engineer, you will play a pivotal role in developing and maintaining high-performance JavaScript libraries that power all the core features of VWO. These libraries are deployed on our customers’ websites, directly impacting millions of users worldwide and enabling seamless digital experiences.

At Wingify, we have a deep passion for vanilla JavaScript and work with advanced technologies like TypeScript, Rollup.js, Cypress, and ESLint to build robust, scalable solutions.

We are unwavering in our commitment to Web Performance, constantly striving to optimize and innovate.

Discover some of our efforts here: https://engineering.wingify.com/posts/performance-improvements-in-vwo-smart-code

Job Responsibilities

• Develop and maintain core JavaScript libraries that serve as the backbone of our projects.
• Write clean, modular, and reusable code that can be leveraged across multiple JavaScript libraries and projects.
• Engage with the developer community by sharing your expertise and experiences through blog posts, open-source contributions, and discussions. Explore our Engineering Blog and GitHub page to see how we give back to the community.

Skills & Experience

Required Qualifications

• Experience: 3–6 years in software development with a strong focus on JavaScript.
• Proficiency: Expertise in Vanilla JavaScript, HTML, and CSS.
• TypeScript: Hands-on experience with TypeScript in production environments.
• Browser Knowledge: Deep understanding of browser internals, including the DOM, browser events, JavaScript APIs, and canvas rendering.
• Optimizations: A strong focus on delivering optimized content for fast user experiences.

Technical Expertise

• Knowledge of high-level programming concepts like Promises and data-binding.
• Experience writing modular, maintainable JavaScript code.
• Exceptional debugging skills to identify and resolve issues efficiently.
• Strong understanding of cross-browser compatibility and differences across modern and legacy browsers.

Testing & Automation

• A passion for writing automated tests to ensure reliability and stability across devices and browsers.
• Experience with testing frameworks such as Cypress or similar tools.

Soft Skills

• A mindset of continuous learning to stay updated with the ever-evolving front-end ecosystem.
• A collaborative attitude and willingness to share knowledge and improve team practices.

What We Value

• A passion for problem-solving and writing elegant, high-performance code.
• A keen interest in the latest advancements in web development technologies.
• A proactive approach to contributing to the broader engineering community.

Company Overview:

VWO made history in 2010 by revolutionizing A/B testing with the launch of the world's first visual editor for webpage modifications, eliminating the need for coding. This innovation catapulted VWO's parent company, Wingify, to become one of India's most successful SaaS companies. Today, VWO is the global pioneer in conversion optimization, empowering marketers to boost conversion rates and drive sales on their websites. With a client base exceeding 2500, VWO promotes a data-driven approach that fosters experimentation and growth. VWO's latest version bundles a myriad of features into a single package, including A/B testing, Heatmaps, Session Recordings, Funnels, Form Analytics, Personalization, Server-Side Testing, and Program management.

To see what we have released recently and in the past, you can check here.

Why Join VWO?

Would you like to own the product vision, strategy, and execution of a product suite used by over 2,500 clients in 90+ countries across various industry domains? Embark on a thrilling journey with a top SaaS company in India as it scales from a $50 million to a $100 million revenue powerhouse. Wingify, a leading player in conversion optimization, aspires to be the most admired tech company to emerge from India.