Worked on the aleph-im/pyaleph repository to address precision issues in storage pricing for small files, focusing on backend development and cost calculation. Improved the reliability of price computations by enforcing the use of Decimal data types in all size-related calculations, which eliminated rounding errors that previously affected billing accuracy. Added targeted unit and regression tests in Python to ensure the fix remained robust against future changes. This work enhanced the transparency and trustworthiness of storage costs for users handling small files, aligning with business requirements for accurate billing. Utilized Python and SQL, emphasizing data integrity and thorough testing practices.