Worked on the labd/commercetools-node-mock repository, delivering two core features over two months focused on pricing accuracy and flexibility. Developed dynamic external pricing for cart line items, implementing currency consistency validation and a fallback mechanism to platform pricing when external data was unavailable. Enhanced the system further by introducing high-precision money support, adding new APIs for calculating and creating high-precision monetary values and updating cart and order workflows to reduce rounding errors. Leveraged Node.js, TypeScript, and full stack development skills to improve the realism and reliability of pricing scenarios in mock-driven environments without addressing bug fixes.