Worked on backend improvements for the Zitadel platform, focusing on reliability, security, and operational efficiency. In the zitadel/zitadel-charts repository, addressed Helm chart behavior by ensuring the FirstInstance.Skip flag was respected, which prevented unnecessary creation of machine keys and login client PATs, reducing both risk and resource usage. Later, in the zitadel/zitadel repository, implemented a feature to load system user private keys from PEM files on disk rather than environment variables, introducing a caching mechanism to minimize disk I/O. These contributions leveraged TypeScript, YAML, and Node.js, streamlining deployment workflows and enhancing security for system-user provisioning and authentication.