Website development is very important, with technology advancing so rapidly you need to stay current and adopt the latest trends. In the web dev industry, if you snooze you lose!
A web developer is someone who takes a web design (often created by a web designer or a design team) and turns it into a functional website. Web developers do this by writing many lines of code, often using multiple programming languages.
A back-end developer is someone who deals more with server-side tech, AKA the functional aspects of a website. This would cover databases and web applications, it is very important to make sure that these are secure, scalable, and easy to maintain.
If you are looking specifically for a “web designer” then they may not have a solid understanding of code. Likewise, a “web developer” may not have any UX or graphic design skills. Web design and web development are two separate beasts, this is something you should consider when mapping out your project.