Principal Backend Engineer, Yahoo Mail

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 Us: We build, enhance, and maintain one of the highest-scaling email platforms on the planet - impacting approximately 300 million users every month and serving billions of requests a day across servers around the world.The Core Mail Team encompasses the full breadth of Yahoo Mail's backend. Our Services group owns the middle tier that contains the APIs and business logic through which virtually all mail operations flow - REST APIs for our world-class mail clients (mobile, web, and beyond), standards-based protocols (IMAP, POP) for generic mail clients, industry-leading backend mail synchronization, Calendar, Contacts, and other foundational services in the Yahoo communication suite. We are actively driving significant modernization efforts to re-platform and scale these services for the future.Our Data group builds and operates the data platform that powers it all - the services and infrastructure responsible for storing and serving message metadata, message bodies, and attachments, as well as large-scale data migration and mailbox metadata systems, all on top of GCP (Spanner, GCS, GKE). This team designs and runs highly available distributed systems, maintains production readiness and BCP for multi-region deployments, and evolves schemas and data models at multi-petabyte scale.Together, we are critical to Yahoo's success - running highly scalable applications across private and public clouds that we are actively transforming to 100% native cloud. Our Services and Data groups collaborate closely with each other, Product, Infrastructure teams, and the broader Mail organization to deliver reliable, low-latency experiences for every user.Come join this amazing team of Engineers, Product Managers and Designers to work on next generation innovative experiences transforming how users connect with each other every day! Responsibilities: Design, implement, test, and debug features in mail supporting client features; revise and refine as requiredProvide technical leadership on high-impact projectsInfluence and coach a distributed team of engineersRequest and participate in code reviews Participate in agile development with weekly sprints, planning & estimating work, daily standup, & retrospectives Learn from a multitude of sources, including on the job project experience, reviewing code from others, team education sessions, collaborating with peers, frequently soliciting advice & shoulder reviews from leaders & architects, as well as online or class-based learning Take initiative to identify, solve, and pursue problems you discover to full completion Contribute to best practices and work culture of our team Drive the adoption and development of AI solutions to enhance system reliability and developer productivity.Stay current with evolving AI-assisted development tools and help define best practices for AI-assisted development.Promote and solicit ideas within project teams A Lot About You: You enjoy solving problems within a collaborative team. You have an interest in the full life-cycle of a product - designing, coding, testing, reviewing, launching, and troubleshooting. You will have the opportunity to participate in projects with significant impact on the success of Yahoo.Experience in OOP. Java or C++ preferredExperience in cloud native application development and architecture preferably in GCP or AWSStrong understanding of the fundamentals including Data Structures, Algorithms, OS and NetworkingExperience with development on Unix (Linux) platformExperience with implementing AI solutions to improve developer productivity and efficiency10+ years of professional software engineering experience 3+ years of experience leading teams by designing, building scalable high-performing distributed systemsProven expertise in the seamless integration of AI-driven coding agents and AI teams within existing development workflows, with an emphasis on enhancing debugging efficiency, accelerating code refactoring initiatives, optimizing code development cycles, and supporting strategic architectural explorationBS/MS in Computer Science or related field Preferred Qualifications: REST API (with Jersey and/or Servlets 3.0)Multi-threaded programming and/or understanding contention issuesLarge-scale, large user base developmentWeb-scale or enterprise-scale developmentImportant notes for your attentionApplications:All applicants must apply for Yahoo openings direct with Yahoo. We do not authorize any external agencies in India to handle candidates’ applications. No agency nor individual may charge candidates for any efforts they make on an applicant’s behalf in the hiring process. Our internal recruiters will reach out to yo