Worked on the spring-projects/spring-ai repository to enhance MongoDB index creation reliability across multiple Spring Data MongoDB versions. Developed a reflection-based compatibility shim that bridges the legacy ensureIndex() API with the newer createIndex() API, addressing API drift and ensuring robust index management for both Spring Boot 3.4.x with MongoDB 4.4.x and 3.5.x with 4.5.x+. This solution centralized version-aware indexing logic, reducing upgrade risk and simplifying future maintenance. Leveraged Java, MongoDB, and Spring for backend development, delivering a testable approach that improves production stability and lays the groundwork for ongoing cross-version API support in evolving environments.