Senior Backend Engineer - Golang

Senior backend engineering role in SumUp's newly formed Commercial Systems and Intelligence squad, building the infrastructure that attributes merchant acquisition, calculates sales commissions and models the merchant lifecycle. You design data models, API contracts and rule definitions in Go, build a centralized Lifecycle Event Log with the Merchant Intelligence squad, and create internal backoffices and APIs for sales teams. You establish testing, observability and incident-response practices for the greenfield squad. The role requires strong Go (or typed-language) backend experience with distributed systems, PostgreSQL/Snowflake and Kafka-based event-driven architectures.