Backyard Landscaping

I am looking for a skilled landscaper to help transform my small backyard in an "L" shape into a private oasis. The ideal candidate will have experience in designing and implementing privacy plants, creating steps to a backyard sliding door, and creating a seating area with a small bar and kitchen, as well as a spa. Although I have a rough idea of what I want, I am open to suggestions and creative input from the landscaper. The backyard is less than 500 sq ft, so the ability to maximize space and create a functional and aesthetically pleasing design is essential.