Senior Kotlin Engineer (m/f/d) - B2B Sales & Distribution team

At Flix, we offer a tech-driven environment where innovation meets real-world impact, with competitive pay, strong growth opportunities, and a culture of collaboration and ownership.

B2B Sales & Distribution team in Demand Division builds and operates the backend platform powering Flix's partner-facing ecosystem — including a self-management platform for partners, a back office portal for internal users, and an AI agentic bot supporting partner operations. As a Senior Kotlin Backend Engineer (m/f/d), you can make an impact by supporting a significant modernization of backend architecture and working in an AI-native development environment.

About the Role

• Design and develop backend services in Kotlin and Spring Boot
• Build and maintain REST APIs used by internal and external partners
• Participate in architectural decisions and technical modernization initiatives
• Improve observability, performance, and reliability of backend systems using DataDog
• Contribute to CI/CD pipelines and cloud infrastructure on AWS and Kubernetes
• Work in and contribute to an AI-native development environment — including AI-integrated code review automation and an internal Claude Code plugin marketplace covering engineering standards: Kotlin/Spring Boot conventions, architectural patterns, testing practices, database guidelines, and team-specific conventions.

About You

• 5+ years of professional backend development experience with JVM languages with at