UX design is a broad term that breaks down into several similar roles. Your project may not need all of them, but it will not hurt to vividly understand the difference between the roles before you hire UX designer.
UX researcher
A UX researcher collects the data on the product and its potential, competitors, and target audience to inform the design process. The UX researcher’s main tools are user research, testing, analysis, and data.
UX strategist
The UX strategist defines the goals of the product experience and aligns these business goals with the end user’s experience. UX strategy results in building information architecture, wireframing, and UX writing.
UX/UI designer
Since UX and UI design are two different parts of a single consumer experience, UX/UI job is at the intersection of product experience and visual design. You may also hire a UX designer, who will be mainly concentrated on building or improving digital experiences, and a UI designer working on the visual part of the product.