About VWO
VWO is a leading Digital Experience Optimization platform trusted by over 3,000 businesses in 100+ countries, including global brands like Samsung, Vodafone, Toyota, HBO, and Domino's. What began 15 years ago as one of the world’s first A/B testing tools has since evolved into a comprehensive, enterprise-grade platform used by product, marketing, and growth teams to experiment, personalize, analyze behavior, and build exceptional digital experiences.
Today, VWO offers a full-stack suite for A/B testing, multivariate testing, feature rollouts, heatmaps, session recordings, behavioural analytics, surveys, personalization, and more across web, mobile, and server-side applications — all in one unified platform. We enable teams to make confident, data-driven decisions that drive user engagement, retention, and conversion
.
VWO is a profitable, founder-led business with $50M+ ARR, strong EBITDA margins, and a history of capital-efficient, sustainable growth. In January 2025, Everstone Capital acquired a majority stake in the company to help accelerate our global expansion — both organically and inorganicall
y.
We are a fully remote team of 450+ people, with go-to-market teams across the Americas, Europe, and APAC, and product and engineering anchored in India. Our culture values deep thinking, fast execution, and strong ownership — with minimal bureaucracy and high autonomy. Despite our scale, we continue to operate with the agility and ambition of a start
up.
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 experien
ces.
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 solut
ions.We are unwavering in our commitment to Web Performance, constantly striving to optimize and inno
vate.Discover some of our efforts here: https://engineering.wingify.com/posts/performance-improvements-in-vwo-smart
-code
Job Responsibi
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Skills & Exp
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Technical E
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Testing & A
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