The way we’ve been attracting Software companies to our UI/UX agency is through sideproject marketing. I wanted to write an article about this but here’s the tldr version of it: build small standalone projects that provide value and communicate the value you provide to potential customers. There are a few good articles about this but I feel sideproject marketing is highly underrated. You can use your skills as a developer/designer to market your service. Without feeling dirty about selling.