Worked on strengthening security and reliability for MobileCoin integrations within the Signal-Android and Signal-iOS repositories, focusing on cryptographic measurement updates and attestation configuration alignment. Updated enclave measurements and replaced outdated service configuration hashes to support MobileCoin v7.x across both mainnet and testnet, reducing the risk of misconfiguration and improving transaction security. Ensured cross-platform consistency by aligning cryptographic measurements and integrating security advisories, which enhanced the resilience of payment flows. Utilized Java and Swift for mobile development, applying expertise in API integration and cryptography to prepare both platforms for future MobileCoin releases and improve long-term maintainability and risk management.