Case insensitive Query with Spring CrudRepository

Exactly as @Peter mentioned in the comment, just add IgnoreCase:

public interface DeviceTypeRepository 
    extends CrudRepository<DeviceType, Integer>, JpaSpecificationExecutor<DeviceType> {

    public Iterable<DeviceType> findByNameContainingIgnoreCase(String name);
}  

See documentation for a list of all supported keywords inside method names.