Michiel worked on backend robustness and scalability for election data in the kiesraad/abacus repository, focusing on supporting larger datasets and concurrent processing. He addressed potential integer truncation issues by implementing safe conversions using Rust’s try_from and enabled proactive linting for cast_possible_truncation. To further reduce overflow risks, Michiel refactored political group identifiers and candidate numbers to use the u32 type, ensuring the backend could handle increased data volumes. His work leveraged Rust and SQL, emphasizing backend development, data structures, and error handling. The depth of these changes improved the system’s reliability and scalability, laying groundwork for future data growth.