WalmartLabs (formerly known as Kosmix Corporation) is the technology division that develops e-commerce platforms and mobile applications that enable customers to shop in retail stores, online, and through their mobile devices. It develops various open source applications that include Lazo, a client-server online framework that allows front-end developers to create SEO compliant and component MVC structured Web application with an optimized first page load; Hapi, a framework for building restful API services that lets developers to focus on writing reusable business logic; and Joi, a validation system that is used to validate JavaScript objects based on a descriptive schema.