Worked on the hibernate/hibernate-orm repository to optimize SQL rendering performance by refactoring the Template#renderWhereStringTemplate method. Applied Java and SQL expertise to redesign the tokenization process, shifting from a nested O(N^3) approach to a more efficient O(N) list-based indexed access. This change reduced CPU usage and improved throughput for complex query generation in ORM workloads, directly benefiting data-intensive applications. The solution enhanced maintainability and code clarity while adhering to established code quality and signing standards. Demonstrated strong back end development skills by delivering a targeted feature that addressed a core performance bottleneck in Hibernate’s SQL rendering logic.