Hadeer was born in Banha, Egypt and her family immigrated to the US when she was seven years old. She completed her undergraduate studies at North Carolina State University in 2013 with a Bachelor of Science degree in Biochemistry and a Bachelor of Arts degree in Chemistry, awarded with highest honors. She distinguished herself by leading the NCSU chapter of the Alpha Chi Sigma Professional Chemistry Society. During medical school at the University of North Carolina-Chapel Hill, Hadeer participated in the Medical Student Research Scholar Program on a project entitled “Decellularized Human Placental Tissue as Scaffold for Bone Generation,” and was inducted into the John B. Graham Medical Student Research Society. She volunteered with the Samaritan Health Center to provide basic medical care to local refugee and underserved patients and to serve as an Arabic translator. She was also Co-leader of the International Health Alliance, promoting awareness of international healthcare opportunities and cultural awareness for students volunteering abroad. Hadeer enjoys cooking and baking (her father is a chef), and cardio kickboxing.