Website and app developing

Hello, I am looking for an experienced programmer to develop a website and an app for me. The programming language I require for these is Java, and I will need some design elements as well – I am open to suggestions in this regard. Additionally, I need the website and app to be compatible with mobile and tablet devices. If you think you have the expertise and technical acumen to design and develop this, I'd love to hear from you. Thank you for your time!