Deep experience designing, building, operating, and debugging RESTful APIs over HTTPS, including API contracts, authentication, authorization, error handling, idempotency, retries, timeouts, observability, backward compatibility, and production troubleshooting. Demonstrated ability to apply AI-assisted development tools such as Codex, Claude Code, GitHub Copilot, or similar tools to improve engineering productivity, code quality, documentation, testing, debugging, and operational workflows.