Worked on the LaunchDarkly Go Server SDK and related test services, focusing on backend reliability and testability. Delivered listener-based flag change notifications across Go and Node.js test services, using Go’s concurrency features and Node’s EventEmitter API to enable dynamic registration and cleanup of listeners without modifying the SDKs themselves. Enhanced end-to-end testing by expanding contract coverage and improving CI reliability through targeted linting upgrades and stabilization of flaky tests. Leveraged skills in Go, TypeScript, and continuous integration to reduce CI failures, accelerate release cycles, and ensure robust validation of feature flag behavior across multiple backend environments and test harnesses.