Backend Engineer (Kotlin, Kafka, DevOps) [Interim]

Backend Engineer — IAM Platform Transformation (Kotlin, Kafka, DevOps) Interim contract | Hybrid (Netherlands, office in the Amsterdam metropolitan area) | Start date immediate, initial term to end of 2026 with possible extension Our client is a leading European food retailer running one of the most ambitious Identity & Access Management transformations in the sector. Across multiple operating companies and enterprise platforms, they are modernising authentication, authorisation, privileged access, identity governance, and application onboarding on cloud-first, security-by-design foundations. This role sits inside the central IAM engineering team enabling secure, compliant, and highly automated identity services for tens of thousands of colleagues, partners, and applications across Europe. You join a multidisciplinary engineering team building the platform capabilities that underpin the entire programme. You will work at the intersection of engineering, cybersecurity, and platform enablement — engineering modern IAM services while owning reliability, automation, and operational excellence at enterprise scale. The stack is cloud-native throughout: Azure, microservices on Kubernetes, CI/CD pipelines, Infrastructure as Code, and Kafka-driven integrations, shipped in small increments with continuous delivery. About Riverflex Riverflex was founded in Amsterdam and London in 2018, eventually growing into a global team of consultants united by a mission to help courageous leaders drive transformative change. Today, we offer an integrated service through three service pillars: strategy and transformation consulting that Creates Change, talent services that Build Teams, and business-accelerating products that Augment Intelligence. For more information, visit www.riverflex.com . Responsibilities You build and maintain scalable microservices in Kotlin/Java that power the IAM transformation landscape. You design and implement secure backend services across authentication, autho