Your Tasks Customer Order Services (COS) is the strategic backbone for customer order data and processing at MediaMarktSaturn. It consolidates order information, standardizes access through a common API model, and orchestrates fine-grained workflows that power the end-to-end online order journey. Positioned as the main communication layer, COS connects the Order Management Systems (OMS) with major corporate applications — such as SAP Retail, Checkout, Payment systems, Invoicing applications, and Pick-and-Pack solutions — ensuring consistent, real-time order processing across the enterprise. Responsibilities & Duties

- Design, implement, and evolve COS REST APIs and event schemas (OpenAPI, API Gateway), enabling contract-first integrations and decoupling consumers from Order Management platform.




- Develop and orchestrate event-driven order workflows with Kafka/Kafka Streams and Temporal (basket-to-order, payment/checkout, digital activation, fulfillment, transport management), ensuring reliability, idem-potency, and auditability.
- Build and maintain data persistence and propagation: model order data in Protobuf, MongoDB, PostgreSQL, drive real-time synchronization to corporate systems, and support analytics via Pub/Sub to BigQuery with strong data quality and PII safeguards.
- Operate the platform on GCP/Kubernetes using GitOps (Flux): monitor and troubleshoot production, optimize performance and scalability, man]]>

📌 Experienced Software Engineer - Fulfillment Order Management (m/f/d) (Barcelona)
🏢 MediaMarkt España
📍 Barcelona