Principal Software App Engineer - Yahoo Mail at Yahoo!

Job description

Yahoo Mail is the ultimate consumer inbox with hundreds of millions of users. It’s the best way to access your email and stay organized from a computer, phone or tablet. With its beautiful design and lightning fast speed, Yahoo Mail makes reading, organizing, and sending emails easier than ever. A little about Yahoo Yahoo is a values-led company committed to building brands people love. We reach over one billion people around the world with a dynamic house of 50+ media, communication and technology brands. A global leader in digital and mobile, Yahoo brands are shaping the future of communication and media. Our mission Build brands consumers love Build platforms customers love Build a company talent loves We are looking for great talent - mobile, frontend and backend software developers, UX designers, and product engineers that can contribute to the development of our exciting next-generation products. If you are excited about the overall lifecycle of a product - building, coding, testing, launching and learning, this is the place to be, because you will learn and gain hands-on experience while engaged in projects with significant impact on the success of our businesses. You are a great problem solver, the capability to work independently as well as with a team, and the willingness to learn from our leadership. Android / React Native We are currently looking for a highly qualified Android developer with strong React Native experience to help us build the next generation of mobile mail experience for Yahoo. We need a dedicated and technically strong engineer with industry knowledge to make our apps even better and to drive the evolution and expansion of our current applications portfolio into new technology areas and market segments. Android / React Native BS, MS, or PhD in Computer Science or a related field, or equivalent practical experience 8+ years of experience building consumer-facing Android, mobile, or web applications Deep technical knowledge of Android application development using Kotlin and Java, with a solid understanding of Android framework components, application lifecycles, and Jetpack Compose Strong foundation in Computer Science, including data structures, algorithms, object-oriented design, and software engineering principles Experience designing and integrating RESTful APIs and third-party services Hands-on experience using AI-powered development tools such as Cursor, Claude Code/Desktop, Gemini, or similar, including CLI and cloud agent workflows as part of daily software development Strong communication, collaboration, and problem-solving skills with the ability to work effectively across cross-functional teams You will be Designing, developing, testing, and shipping features for Yahoo Mail's mobile experience, used by millions of users worldwide Owning projects end-to-end, from technical design and implementation through deployment, monitoring, and ongoing improvements Performing code reviews while contributing to and learning from a highly collaborative engineering culture Driving technical decisions and recommending scalable, maintainable solutions to complex engineering and user experience challenges Tackling challenging performance, reliability, and usability problems with elegant and efficient solutions Taking ownership of key features and technical areas that directly impact millions of users Collaborating closely with Product, Design, Data Science, and Engineering teams to deliver exceptional user experiences Mentoring teammates and helping raise the engineering bar across the team Leveraging AI coding assistants and software engineering agents to accelerate development while maintaining high standards for code quality, security, and performance Bonus points if you have Experience shipping Android applications to the Google Play Store Experience building email, messaging, or communication applications Experience with React Native or modern web technologies including React, JavaScript/TypeScript,