I reviewed hundreds of resumes this month. Here are the common issues I found. Thread.
Talk more about the things you achieved and accomplished at each job in your resume. Never write “Worked on an iOS application.” You need to have more than 2 tiny bullet points. Give some detail!
Not using a resume template that stands out. I suggest you try using Canva (free & easy tool that also has resume templates) and making it unique.
Not staying consistent in formatting/font/etc. If you use bullet points, use one type. If you use tabbed spacing, meticulously go over the entire resume to make sure everything is aligned. If you use a font, keep it consistent. Don’t change in the size every three lines either.
Don’t make your resume 7 pages long. Or anywhere close to 7 pages. Recruiters are busy and reviewing dozens of resumes at any given time. They don’t have the time to read all seven pages.