Jefimija was born in Serbia, where she began music education at the Academy of the Arts in Novi Sad, specializing in piano before devoting to organ fulltime. In 2013, she came to the U.S. to pursue a B.M. in organ performance from the University of Indianapolis, where she graduated at the top of her class in 2017. In 2019, Jefimija received her M.M. from Indiana University Jacobs School of Music, where she studied under Christopher Young. Jefimija has performed solo recitals at Christ Church Cathedral and Northminster Presbyterian Church in Indianapolis, First Presbyterian Church in Bloomington and Evansville, and St. Francis Seraph in Cincinnati, and has held many principal organist positions throughout her career. Jefimija currently serves as flue voicer and assistant organ builder at M.P. Rathke Inc., an organ building shop in Cincinnati. She lives with her husband Jim and their two felines Henri and Jiji, and spends her free time hiking, reading, painting, knitting, and traveling.