Their application asks for your specific date of birth, which is illegal under EEOC regulations and can set the stage for age discrimination. In the interest of "demographics" they also ask regarding sexual identity, ethnicity, and disability status. While those questions do have a "prefer not to say" option, the nature of the application questions leads me to believe they're looking for a very specific "type" of person, e.g. white, young, tech-savvy male. Common with start-ups. I closed out the app and moved on.