Max Kratz contributed to the element-hq/synapse and goauthentik/authentik repositories, focusing on infrastructure and documentation improvements. He upgraded the Docker Compose configuration for Synapse to use PostgreSQL 15, addressing end-of-life concerns and ensuring ongoing compatibility and deployment stability. This change reduced operational risk in both CI/CD and production environments. In goauthentik/authentik, Max enhanced integration documentation for Matrix Synapse JWT authentication, clarifying signing key requirements and providing detailed configuration examples. His work utilized Docker, PostgreSQL, Markdown, and YAML, demonstrating a methodical approach to both code and documentation that improved maintainability and reduced integration ambiguity for future adopters.