Worked on enhancing the durability and fault tolerance of the Postgres CDC Connector in the feldera/feldera repository, focusing on backend development and database management using Rust. Developed a checkpoint watcher mechanism that ensures replication slots advance only after a durable checkpoint is reached, allowing input adapters to defer acknowledgment until data is securely processed. This approach guarantees at-least-once delivery semantics and protects against data loss in the event of crashes, all without introducing new user-facing configuration. The work aligned with the FtModel::AtLeastOnce mode, preventing misconfigurations and improving the reliability of data ingestion pipelines in production environments.