Based on your branding and UX requirements, I realize the user interface (UI) that matches your specific audience. I also ensure it will fit on any required support (responsive design) and that it respects accessibility and ergonomics constraints. Depending on needs and project size, I also deliver color palette, libraries, full design with size variants, individual elements as flat images, vector images, icons.
When needed, I additionally create illustrations and retouch pictures from simple fine tuning to compositing.
Prior to this, in case your project doesn't have a specialist in User Experience (UX), I analyze your project needs and may provide UX design that will fit with your audience.
I may also provide HTML/CSS/JS(vanilla) demos, integration and templates for animated interaction of design I produced.