Anca Antochi enhanced data processing error handling in the Azure-Samples/explore-iot-operations repository by introducing explicit Result-based return types in Rust for data transformation and filtering functions. This approach improved type-safe error handling and enabled earlier fault detection within IoT data pipelines, reducing the risk of downstream outages. Anca refactored existing code to adopt functional-style return patterns, updated related tests, and revised documentation to align with the new contract. The work focused on backend development and robust error diagnosability, resulting in more reliable data processing and easier incident resolution, though no major bugs were addressed during this period of contribution.