interior designer       
noun [ C ] uk/ɪnˌtɪə.ri.ə dɪˈzaɪ.nər/ us/ɪnˌtɪr.i.ɚ dɪˈzaɪ.nɚ/
 室内设计师
a person who plans the decoration of the inside of a building such as a house or office
  “Modern and cosy” is the look this interior designer is known for. “现代和舒适”的外观是这位室内设计师令人熟知的风格。 
 They hired an interior designer to help plan the kitchen renovation. 他们聘请了一位室内设计师来帮助规划厨房的装修。 
 See: interior design
 - More examples
 - Interior designers transformed the bedroom, sitting room, and living room into warm, chic spaces.
 - She’s an interior designer who grew up in a log cabin.
 - The partners are interior designers specializing in office spaces.