Domain Architect

Must-Have

1. 10+ years engineering, 5+ years building payment systems
2. Domain-driven design: bounded contexts, domain events, context mapping
3. Expert C# / .NET 8+ and still codes
4. Temporal (preferred) or similar durable workflow engine in production
5. Kafka in production
6. Azure PaaS: App Service, Cosmos DB, APIM, Key Vault --> Similar technology on Google Cloud Platform
7. Containerization, running code in Kubernetes
8. Idempotency, saga, and reconciliation patterns in production
9. PCI DSS and tokenization
10. OpenTelemetry or APM observability design
11. Track record of aligning multiple teams on a shared architecture

Nice-to-Have

1. Temporal Nexus or Worker Versioning
2. EBT SNAP / WIC processing
3. Digital wallets: Apple Pay, Google Pay
4. Gateway APIs: Aurus, Adyen, Client, Worldpay, Chase
5. Network tokens, DPAN, multi-capture, marketplace split settlement
6. Multi-cloud: Azure + Google Cloud Platform
7. LaunchDarkly-driven migrations
8. .NET Aspire, Testcontainers, Mockoon/WireMock
9. Retail finance feeds (TLOG, sales audit, GL)
10. Grocery/omnichannel retail
11. Google Cloud Platform experience