Ljiljana Becker was born in Belgrade (Serbia) where she started with her piano and music theory training at the age of seven. She has studied music composition in Montenegro and Croatia with Prof. Željko Brkanović, (received BM in music compositionin in 1988) and in 1989 moved to Stuttgart (Germany) in order to attend a professional short-term specialization (Kontaktstudium) in musique concrète at the Staatliche Hochschule für Musik und Darstellende Kunst with Prof. Ulrich Süße.

Ljiljana continued her professional specialization (Aufbaustudium and Kontaktstudium) in New Music Theatre/Composition at the Rheinische Musikhochschule in Cologne with Prof. Mauricio Kagel, as well as musicology, Slavic philology and philosophy at the Cologne University. In 2002 she completed the graduate studies in interdisciplinary theatre at Towson University in Maryland (MFA in Theatre) where she was the recipient of College of Graduate Education and Research Fellowship for 2001/2002. (composition/electronic sound studies with Dr. William Kleinsasser) 

Ljiljana participated at the 2. Tonkünstlerfest Baden-Württemberg, Rheinisches Musikfest, Documenta IX and MusikTriennale Köln festivals, and was part of The Creator "pro-active, mentoring and cross cultural" TV production in Vancouver, the GEDOK Music Series in Cologne and Women Between Worlds and New Roots, multi-disciplinary & multi-cultural documentaries directed by Exsul van Helden. She was awarded two residencies at the Banff Centre for Arts and Creativity in Canada, Meet the Composer Grant for her orginal music for the Movin' Macbeth  thetre production in New York City, and the first prize for an abstract radiophonic form Modi’in (Hommage to Mauricio Kagel) by Radio Belgrade, Serbia. In 2018 Modi'in represented radio Belgrade at the Prix Palma Ars Acustica, Phonurgia Nova, Prix Italia, and Karl Sczuka international annual radio competitions organized by various groups of the European Broadcasting Union (EBU).

Ljiljana's projects have been performed in Europe, Canada and US. She is a member of the Baltimore Composers Forum (BCF) since 2002 where she serves as and officer and  pesident since 2009. She is also listed in Adkins Chiti Foundation: Donne in Musica. 

Fifth Mirror [Part I] has been released by Chen Li Music as part of their Pluralities CD. In September 2019 Modi'in [Part I] has been performed at the District New Music Coalition's New Music DC 2019 Conference, and in October Ljiljana toured throughout Maryland and DC with her New Music Theatre project The Suitcase/Der Koffer featuring mezzosoprano/actress Chris Roberts, Duo Crveno from Cologne, Germany, libretto by Juanita Rockwell, and cenography and puppets by Allison Campbell. She is featured in February 2022 issue of NewMusicBox online magazine's Different Cities Different Voices - Baltimore.

2022 marked the 30th anniversary of the Piazza virtuale project, and Ljiljana premiered her radiophonic collage, Ceci n'est pas une pipe - Revisited at Goethe Institute in Belgrade, Serbia, as part of the Slobodanka Stupar: Das ist keine Pfeife/zum zweiten Mal exhibition. 

In 2023 she has established 3State Concert Series that promotes interdisciplinary collaborations with the musicians, writers, visual artists, video and film makers, and choreographers and dancers.

In 2026 her project Perunika was awarded a grant by The Arts and Humanities Council of Montgomery County in Maryland, and was subsequently performed multiple times in Maryland and Washington, D.C.

Ljiljana is multilingual, and had also written under the professional name Jovanović.