Sinch is seeking a Senior Backend Engineer to join their SaaS Engage Platform team, focusing on Contacts and Inbox services. The role involves developing high-impact, scalable distributed backend services using Java, MongoDB, and Kafka. As part of a cross-functional, autonomous team, you'll be responsible for the entire software development lifecycle, from design to deployment. The position requires expertise in microservices architecture, event-driven systems, and non-relational databases. You'll work on critical messaging and engagement functionalities, ensuring reliability and performance at scale. The ideal candidate brings 6-8 years of backend development experience and strong collaborative skills. Sinch offers a competitive package including health benefits, flexible work arrangements, and growth opportunities in a global, multicultural environment.