Google's Core team is seeking a Senior Software Engineer to help build the technical foundation behind Google's flagship products. This role involves developing essential building blocks for user experiences and driving innovation across the company. You'll work on critical projects with opportunities to switch teams as needed. The position requires expertise in full-stack development, including both backend (Java/Kotlin) and frontend (JavaScript/TypeScript) technologies. You'll be responsible for writing code, leading design reviews, maintaining documentation, and ensuring system quality. The role offers the unique opportunity to impact technical decisions across Google while working with cross-functional teams. The Core team serves as owners and advocates for underlying design elements, developer platforms, product components, and infrastructure, looking across Google's products to build central solutions and strengthen existing systems. This is an excellent opportunity for experienced engineers who want to contribute to large-scale systems that affect billions of users.