- Building and operating containerized Java services through Git-based CI/CD in Kubernetes or comparable orchestration.
- API integration well beyond basic CRUD auth, pagination, rate limits, retries, and unreliable upstream behavior including hands-on Microsoft Graph or similarly complex enterprise APIs.
- Working experience consuming or implementing GraphQL, plus gRPC and Protocol Buffers.
- Deep JSON and XML parsing (Jackson, StAX/SAX/JAXB) with secure parser configurations, and byte-level diagnosis of text-encoding and binary-format issues.