Calvin Spark developed a user-specific security key handling feature for the deanlee/openpilot repository, focusing on secure car parameter management. He implemented robust error handling for reading security keys from files and validated key criteria to ensure only compliant keys were accepted, directly supporting the product’s security objectives. Using Python and backend development skills, Calvin integrated the SecOCKey into the car’s parameter workflow, enabling per-user security key management. The work addressed the need for individualized security controls and improved operational safety. Although the scope was limited to one feature over the month, the solution demonstrated depth in secure backend engineering practices.