Principal Software Engineer - Integration & Data Architecture

GHX is a healthcare supply chain exchange. At its core, what we do is move transaction data reliably between thousands of trading partners. Integration and data architecture are not supporting concerns here; they are central to how our product works and how we scale. This role owns the long-term stewardship of both problems: how data is modeled, accessed, and owned within our services, and how it flows reliably across them. You will work directly with application teams as a hands-on technical partner and architect, setting technical direction, establishing integration and data patterns, and ensuring the architectural quality we build today does not become tomorrow's maintenance burden. Your peers are strong backend engineers building real products. You earn trust through depth and direct engagement, not architecture diagrams from a distance. What You'll Do Integration Architecture & Event-Driven Systems Define GHX's integration patterns: outbox, saga, CDC, event-carried state transfer, dual-write mitigation, and when to choreograph vs. orchestrate Guide service boundary design: where to draw domain lines, how to handle shared reference data, and how to prevent shared-database coupling between services Own the messaging and eventing layer: topic and queue design, schema contracts, partitioning, retention, consumer group management, dead-letter handling, replay, and operational monitoring Lead the architectural direction for replacing GHX's homegrown event bus with a cloud-native messaging platform, and establish the standards teams will build on after the transition Guide teams on streaming vs. batch trade-offs and on replacing batch- or file-driven pipelines with event-driven flows where latency and reliability require it API Design, Contracts & DevOps Establish REST API design standards: resource modeling, versioning strategy, error contracts, pagination, and backward compatibility Own the API governance lifecycle: versioning policy, deprecation timelines, breaking