We all make mistakes—that’s what makes us human. But when you’re looking for a new job, it’s important to minimize those job application mistakes because it may cost you the position. Here are some of the biggest application mistakes candidates make (and how to avoid them). Spelling/Grammatical Errors: These types of errors, although they seem small in nature, can be a major red flag to employers. It shows you lack attention to detail, and many hiring managers or recruiters will think you rushed through your application. Read more.