During April 2025, Davor B worked on the Backbase/openapi-tools repository, focusing on enhancing the reliability of generated client SDKs. He addressed a bug in the WebClient API Template by ensuring Jakarta Bean Validation imports were correctly included, which resolved issues with missing validation annotations in generated clients. Using Mustache as the template engine and applying his skills in code generation, Davor validated the fix through local builds and client generation checks. This targeted update improved downstream integration stability by reducing build and runtime errors, demonstrating a solid understanding of Java, Jakarta Bean Validation, and OpenAPI code generation workflows.