Niko worked on improving the reliability of AWS DMS endpoint configuration in the opentofu/terraform-provider-aws repository. Focusing on correctness, Niko addressed a bug where nested PostgreSQLSettings were not consistently applied during endpoint modification. Using Go and leveraging skills in AWS and Terraform Provider Development, Niko ensured that PostgreSQLSettings are always transmitted during Modify operations, even when top-level fields remain unchanged. The solution included an integration test to guard against future regressions and comprehensive documentation for downstream users. This work reduced the risk of misconfiguration and enhanced the predictability of DMS endpoint updates, reflecting a thoughtful and thorough engineering approach.