Worked on enhancing the security and reliability of MQTT source integration within the vectordotdev/vector repository by addressing a bug related to mutual TLS authentication. Focused on backend development using Rust, the work involved ensuring that user-provided TLS client certificates were correctly passed to the rumqttc library, enabling proper mutual TLS connections for secure data ingestion. This fix improved compatibility and reduced support issues related to TLS, directly supporting secure customer deployments. The approach included validating end-to-end mTLS connections and updating relevant changelogs, demonstrating attention to both technical implementation and documentation within the Rust and MQTT ecosystem.