Worked on the influxdata/iceberg-rust repository, delivering a performance-focused refactor of writer builders in Rust for backend development. The main contribution involved redesigning IcebergWriterBuilder, RollingFileWriterBuilder, and FileWriterBuilder to support non-consuming build semantics, allowing builders to be reused without cloning. This approach reduced memory allocations and enabled the creation of multiple writers with identical configurations, streamlining multi-writer scenarios. The changes improved both performance and developer ergonomics, laying groundwork for scalable writer pipelines in high-throughput environments. The work addressed a specific issue and was implemented entirely in Rust, demonstrating a strong grasp of backend architecture and efficient resource management.