Bertrand Braschi enhanced Shopify’s extensions-templates and cli repositories by standardizing payments extension naming and refactoring directory structures to improve maintainability. He introduced per-extension feature flags, enabling granular control over extension visibility and behavior, and corrected extension references to ensure accurate deployment. In Shopify/cli, Bertrand implemented module context-aware deployment targeting, adding conditional configuration fields and comprehensive tests to increase deployment accuracy. He also improved test reliability by aligning mocks and expectations for unauthorized handling, reducing CI flakiness. His work leveraged JavaScript, TypeScript, and Ruby, demonstrating depth in full stack development, configuration management, and robust testing practices across complex codebases.