During August 2025, this developer delivered the Billing Checkout Setup API within the wireapp/wire-web-packages repository, enabling embedded checkout initiation by accepting team ID and currency as part of a broader billing and checkout setup flow. The work focused on backend and API development using TypeScript, emphasizing RESTful endpoint design and integration with existing billing infrastructure. The implementation aimed to streamline customer onboarding and automate revenue setup, reducing integration friction for downstream consumers. All changes passed continuous integration and testing, with no major bugs or regressions reported. The contribution laid a foundation for faster, more reliable billing processes within the platform.