Worked on enhancing TLS stability and interoperability for the Expensify/Bedrock repository, focusing on HTTPS support with custom certificates. Addressed a critical SSL regression by reverting the mbedTLS upgrade to version 2.28.8, restoring stable SSL behavior across deployments. Implemented SX509-based certificate handling in C and C++, enabling Bedrock to establish HTTPS connections using customer-provided certificates. This work improved compatibility with external systems requiring custom certificate chains and reduced the risk of TLS-related issues. Leveraged expertise in build systems, network programming, and SSL/TLS to deliver security and reliability improvements, though no new user-facing features were introduced during this period.