Keep it short. One to two paragraphs with summary / goals / why you want to work there in the email body or in a cover letter helps as well. In the CV itself,

Keep it short. One to two paragraphs with summary / goals / why you want to work there in the email body or in a cover letter helps as well. In the CV itself, max two pages, bullet points with relevant technologies, most recent/relevant work experiences, URLs for Linkedin / github / projects.