Our development, research and security teams spend their days building, testing and improving on the products you know and love and creating what's next. We're a community of people who are passionate about the technologies you care about. Every day, our user experience researchers spend hours learning about our consumers. We partner with product teams to create intuitive experiences and drive corporate strategy through a deep understanding of our users.

Working in AI, machine learning and many more research areas at a global scale of 1 billion users. Our scientists are at the center of our key products, providing both foundational research and impactful applied work. The Paranoids are the security organization protecting Yahoo’s products and experiences. Read about how they collaborate with business partners to enable stronger protections and safer experiences. Our developers create and deploy the Yahoo services you have come to depend upon, coding products using the latest technical innovations to put customer needs first.