Airbnb is seeking a Senior Backend Engineer to join their Guest & Host team in London. This role focuses on building new tools to facilitate co-hosting and improve host connections on the platform. As part of a collaborative team working with San Francisco-based engineering teams, you'll be responsible for scaling this initiative globally with new functionality. The position offers opportunities to work on innovative and technically challenging projects that support major company strategies, focusing on areas such as UX, scale, performance, robustness, and quality. You'll be instrumental in architecting and implementing complex features, collaborating across teams, and mentoring junior engineers. The ideal candidate brings 5+ years of backend development experience, strong expertise in Java/Kotlin, and a proven track record in large-scale service-oriented architectures. This role combines technical leadership with hands-on development, making it perfect for engineers passionate about building scalable solutions that impact millions of users worldwide. Working at Airbnb means joining a company committed to diversity and inclusion, with a global reach of over 5 million hosts and 2 billion guest arrivals.