Gilles Peskine engineered robust cryptographic infrastructure and test automation across the Mbed-TLS/mbedtls-framework repository, focusing on API modernization, build reliability, and secure integration of PSA Crypto. He refactored threading and entropy subsystems, streamlined configuration validation, and enhanced cross-platform compatibility using C, Python, and CMake. Gilles introduced modular build helpers, improved Docker-based CI pipelines, and delivered migration guides to support seamless upgrades. His work included rigorous test harness development, code refactoring for maintainability, and the removal of legacy APIs to simplify future integrations. The depth of his contributions ensured safer deployments, reduced maintenance overhead, and accelerated adoption of modern cryptographic standards.