During November 2025, Simon contributed to the actualbudget/actual repository by implementing multi-currency support, specifically adding Guatemalan Quetzal (GTQ) and Danish Krone (DKK) to the platform. He updated core currency definitions and currency settings using TypeScript and React, enabling accurate pricing and reporting for users in GTQ and DKK regions. Simon organized the work in a dedicated branch to streamline code review and released comprehensive documentation outlining the business impact of these changes. This feature expanded the system’s payment and reporting capabilities, demonstrating a focused approach to front end development and currency architecture within a short project period.