Must be comfortable navigating a polyglot environment that includes Java interop, multiple integration protocols (REST, message queues, serverless), multiple databases and data platforms including Oracle, MySQL, Microsoft SQL Server, Microsoft Fabric, Snowflake, AWS, and various integration partners and systems. Write production code, perform deep-dive code reviews across the integration layer (core service interop, partner APIs, message queue consumers, etc.), and guide the team through complex technical problems.