What matters in a resume is: Employer name, Your title, brief description of what you did in bullet points.
It does NOT need to use the STAR format.
Resumes and cover letters are in theory basically a proof of work check to ensure you're interested enough to spend time on the application.
What matters in a resume is: Employer name, Your title, brief description of what you did in bullet points.
It does NOT need to use the STAR format.