Asian ladies tend to look different from Caucasian ladies. So it evokes a different picture. I don't think racism or sexism or anything needs to be cited.
Sure, you can point out that he seems to be writing from the default perspective of a white Caucasian (assuming everybody else is also a white Caucasian, unless mentioned otherwise). Is that a crime? I think not. If you are from a different background and curious about the "race" of the guys, just ask.
You sound like a real blast to hang out with. Perhaps we can exchange telephonic-network details and beep at each other on the phone. That is, if your protocol handshake is functioning in a timely fashion. My buffer has strict timeout definitions of two signals and then I will reset the network line, wait for the dial tone, and try again precisely 15:00 standard earth minutes later. Please encode any further communication in base64. dGhhbmsgeW91IGdvb2QgYnll
The point of a story is painting a picture. Adding additional descriptors paints a clearer picture in the mind of your reader. The author wanted you to call up in your mind's eye a man in a t-shirt, a man in a polo, and a woman of Asian descent. Maybe that's his experience with start-up interviews, maybe he wanted to force "diversity" upon the reader. Either way, the author chose to describe the Asian woman to you because he wanted you to picture an Asian woman. Why is that a problem?