Worked on the spring-projects/spring-data-elasticsearch repository to enhance the reliability of entity mapping when using scripted fields in Elasticsearch. Addressed a bug in the MappingElasticsearchConverter by introducing checks to ensure scripted fields exist before attempting to populate entities, thereby reducing runtime errors and improving data integrity. Developed comprehensive unit tests to validate both default and custom-named scripted field scenarios, ensuring future changes do not reintroduce the issue. The work leveraged backend development skills with a focus on Java and Spring Data, demonstrating careful attention to stability and correctness in complex data mapping workflows involving Elasticsearch scripted fields.