Designed and delivered large-scale, stateful architectures. Implemented robust patterns for coordinating multi-step workflows across services. Experience building reconciled workflows with audit trails and automated recovery. Bake in observability, fault tolerance, and graceful degradation. Understands caching, queueing, rate-limiting, and system tuning. Ability to break down complex trade-offs, document designs, and align stakeholders. Bias toward action and high standards for production-ready quality.