How to make an impact on build quality as a sdet/automation engineer

As a sdet/automation engineer if you are working with QAs/Test engineer after the release is deployed in QA then it’s already too late for you to make an impact in build quality, you need to work with developers and help them automate their unit testing and integration testing cycle by running automation suite or by providing them utilities/test scripts which can help them to deliver better quality builds to QA. Spend time with your developers to accelerate and enhance their testing activities and you would automatically see an increase in build quality and a decrease in build release timelines.