During a two-month period, Buhhunyx contributed to MicrosoftDocs/azure-devops-yaml-schema and keycloak/keycloak, focusing on backend development, documentation, and security. In the Azure DevOps YAML Schema repository, Buhhunyx updated Maven task documentation to support JDK 21, enabling teams to adopt the latest Java version with minimal integration friction and improving documentation clarity using Markdown. In the Keycloak project, Buhhunyx addressed a security vulnerability by fixing a case-insensitive password policy bypass, ensuring passwords matching usernames in any case are rejected. This work included implementing robust unit tests in Java, demonstrating attention to secure authentication and comprehensive test-driven development practices.