-Saradnik u nastavi, 2003.god., Viša elektrotehnička škola u Beogradu, Elektrotehnika i računarstvo
-Stručni saradnik, 2004.god., Viša elektrotehnička škola u Beogradu, Računarske tehnologije
-Asistent, 2009.god., Visoka škola elektrotehnike i računarstva strukovnih studija u Beogradu, Elektronika i telekomunikacije
-Predavač, 2012.god., Visoka škola elektrotehnike i računarstva strukovnih studija u Beogradu, Elektronika i telekomunikacije
-Profesor strukovnih studija, 2017.god., Visoka škola strukovnih studija za informacione tehnologije (ITS) u Beogradu, Informacione tehnologije
-Viši predavač strukovnih studija, 2023.god, Akademija tehničkih strukovnih studija u Beogradu, Računarstvo i informatika
-Profesor strukovnih studija, 2024.god., Akademija tehničko-umetničkih strukovnih studija u Beogradu, Računarstvo i informatika
-Autor/koautor više od 100 radova objavljenih u međunarodnim i nacionalnim časopisima i zbornicima radova međunarodnih i nacionalnih konferencija i simpozijuma
-Recenzent Nacionalnog tela za akreditaciju i obezbeđenje kvaliteta u obrazovanju (NAT), od 2022.god. (TT polje, Informacione tehnologije), https://www.nat.rs/lista-recenzenata/
-Recenzent u međunarodnim naučnim časopisima (Electronics and Electrical Engineering, http://www.ee.ktu.lt/, Digital Signal Processing, http://ees.elsevier.com/dsp/, IEEE Communications Letters, http://www.comsoc.org/cl)
-Učešće u radu zimske škole programiranja i dizajna IT FEST, https://www.it-skola.com/
-Inovacije u obrazovanju (uverenje izdato od strane Instituta za moderno obrazovanje Beograd, na stručnom skupu priznatom od strane Zavoda za unapređivanje obrazovanja i vaspitanja, 167-4/2023, od 10.4.2023.god)
-Učešće na stručnim projektima za potrebe privrednih subjekata (AlbaMT Group Limited, Malta; IT CENTAR, Niš; INTERFAST, Beograd; COMING-COMPUTER ENGINEERING d.o.o., Beograd; DATATEK d.o.o., Beograd; “ENEL” PS, Beograd)
H. Stefanović, Probabilistički modeli bežičnih kanala (Probabilistic Models for Wireless Channels), Monografija, Zadužbina Andrejević, Beograd, 2015, ISSN 0354-7671, ISBN 978-86-525-0219-6
V. Jeremic, R. Bucea-Manea-Tonis, S. Vesic, H. Stefanovic, “Revolucionizacija softverskog testiranja: Uticaj veštačke inteligencije, mašinskog učenja i Interneta stvari”, EdTech Journal, Vol. 3, Br. 1. pp. 8-11, 2023, ISSN 2812-8753, ISSN (Online) 2812-8761
https://edtechjournal.org/index.php/ed/issue/view/4/4
G. Bjelobaba, M. Paunovic, A. Savic, H. Stefanovic, J. Doganjic, Z. Miladinovic Bogavac, “Blockchain Technologies and Digitalization in Function of Student Work Evaluation”, Sustainability, Vol. 14, No. 9, Aticle Number 5333, 2022, ISSN 2071-1050
https://doi.org/10.3390/su14095333
https://www.mdpi.com/2071-1050/14/9/5333
H. Stefanovic, B. Kocic, A. Savic, N. Popovic, “Cryptocurrencies as an accelerator of sustainable development“, Annals of Spiru Haret University-Economic Series, Vol. 13(22), Issue 1, pp. 127-135, 2022, ISSN 2393-1795, ISSN-L 2068-6900
http://anale.spiruharet.ro/economics/issue/view/141/pdf_26
doi: https://doi.org/10.26458/2216
I. Jovanovic, M. Majstorovic, H. Stefanovic, “Zaštita i upravljanje bezbednosnim rizicima, predlog kriptoloških mera i rešenja za preduzeće Vesimpex”, EdTech Journal, Vol. 2, Br. 2. pp. 34-41, 2022, ISSN 2812-8753, ISSN (Online) 2812-8761
https://www.edtechjournal.org/index.php/ed/article/view/27/38
H. Stefanovic, A. Savic, R. Veselinovic, G. Bjelobaba, “An application of visual cryptography scheme with digital watermarking in sharing secret information from car number plate digital images“, International Journal of Engineering Inventions–IJEI, Vol. 10, Issue 2, pp. 1-11, February 2021, e-ISSN 2278-7461, p-ISSN 2319-6491
http://www.ijeijournal.com/papers/Vol10-Issue2/A10020111.pdf
M. Jevremovic, H. Stefanovic, D. Stojakovic, N. Staletic, “Can we predict the effects of using the interactive features of the website?“, Annals of Spiru Haret University-Economic Series, Vol. 12(21), Issue 4, pp. 181-192, 2021, ISSN 2393-1795, ISSN-L 2068-6900
http://anale.spiruharet.ro/economics/issue/view/137/pdf_25
doi: https://doi.org/10.26458/2149
H. Stefanovic, A. Djokic, “Analysis and visualization of Smart House data set in Python programming language“, International Scientific Conference on Information Technology, Computer Science, and Data Science SINTEZA 2024, Proceedings of papers, pp. 128-134, Belgrade, Serbia, May 16, 2024
DOI: https://doi.org/10.15308/Sinteza-2024-128-134
https://portal.sinteza.singidunum.ac.rs/paper/964
H. Stefanovic, A. Djokic, “Evaluation of the compression ratio of various files after the application of Huffman coding technique“, International Symposium on Operations Research-SYM-OP-IS 2024, Proceedings of papers, pp. 158-163, Tara, Serbia, September 16-19, 2024, ISBN 978-86-6022-703-6
https://symopis2024.ftn.uns.ac.rs/wp-content/uploads/2024/11/SYM-OP-IS-2024_PROCEEDINGS_final.pdf
A. Djokic, H. Stefanovic, “Analysis and visualization of COVID-19 data set in Python programming language“, International Scientific and Professional Conference POLITEHNIKA 2023, Proceedings of papers, pp. 496-500, Belgrade, Serbia, December 15, 2023, ISBN 978-86-7498-110-8
http://skup-politehnika.atssb.edu.rs/
S. Ersoy, A. Savic, G. Bjelobaba, H. Stefanovic, “Collaborative Learning of Mathematics Supported by Blockchain Technology in the Context of Mandelbrot and Julia Sets“, International Conference Science and Higher Education in Function of Sustainable Development-SED 2023, Proceedings of papers, pp. 1-181 – 1-189, Vrnjačka Banja, Serbia, June 5-8, 2023, ISBN 978-86-82078-18-0
https://sed.akademijazs.edu.rs/fajlovi/papers/proceedings/1-27.pdf
N. Dragovic, S. Andjelic, G. Radic, H. Stefanovic, “Xamarin Platform – Development of cross-platform C# apps for mobile devices“, LINK IT & EdTech23 International Scientific Conference, Book of Proceeding, pp. 67-77, Belgrade, Serbia, May 26-27, 2023, ISBN ISBN-978-86-87175-20-4
https://docs.google.com/document/d/1kkM6bI7O1Pk7y_rbQiVQgSj7jswORapd/edit
H. Stefanovic, A. Savic, G. Bjelobaba, N. Popovic, “Simulation and Analysis of Blockchain Operations Model with RSA Algorithm in CrypTool2“, E-business Technologies Conference-EBT 2023, Proceedings of papers, pp. 171-175, Belgrade, Serbia, June 15-17, 2023, ISBN 978-86-7680-427-6
https://www.ebt.rs/wp-content/uploads/2023/06/proceedingsEBT2023-FINAL-07.06.2023.pdf
Dj. Sarcevic, D. Rudnjanin, A. Djokic, H. Stefanovic, “An analysis of different chaining modes in symmetric cryptographic algorithms applied in digital image transmission“, International Scientific Conference UNITECH 2023, Proceedings of papers, Vol. 1, pp. 314-317, Gabrovo, Bulgaria, November 17-18, 2023, ISSN 1313-230X
A. Savic, H. Stefanovic, G. Bjelobaba, N. Popovic, “The simulation model of blockchain transaction“, International Symposium on Operations Research-SYM-OP-IS 2022, Proceedings of papers, pp. 607-612, Vrnjacka Banja, Serbia, September 19-22, 2022, ISBN 978-86-403-1750-4
https://symopis2022.ekof.bg.ac.rs/download/Zbornik%20-%20Sym-Op-Is%202022.pdf
H. Stefanovic, B. Kocic, A. Savic, N. Popovic, “Cryptocurrencies as an accelerator of sustainable development“, International Conference on Economic Sciences and Business Administration-ICESBA 2021, Book of Abstracts, pp. 135-136, Bucharest, Romania, November 26-27, 2021, ISBN 978-606-20-0475-0
https://icesba.eu/pdf/ICESBA_2021.pdf
N. Popovic, H. Stefanovic, “An Adaptive Colour image Segmentation using Edge Detection and Clustering based on Machine Learning“, International Scientific Conference Globalisation Challenges and the Social-Economic Environment of the EU, Proceedings of papers, pp. 350-355, Novo mesto, Slovenia, May 20, 2021, ISBN 978-961-6770-50-7
N. Popovic, G. Bjelobaba, H. Stefanovic, A. Savic, N. Stefanovic, “The Knowledge Evaluation System in Function of Achieving Competences“, E-business Technologies Conference-EBT 2021, Book of Extended Abstracts , pp. 136-137, Belgrade, Serbia, June 10-11, 2021, ISBN 978-86-7680-390-3
https://ebt.rs/wp-content/uploads/2021/09/BookOfAbstract.pdf
G. Bjelobaba, H. Stefanovic, A. Savic, N. Stefanovic, N. Popovic, “A New Approach to Scientific-Research Paper Evaluation“, E-business Technologies Conference-EBT 2021, Book of Extended Abstracts , pp. 130-132, Belgrade, Serbia, June 10-11, 2021, ISBN 978-86-7680-390-3
https://ebt.rs/wp-content/uploads/2021/09/BookOfAbstract.pdf
G. Bjelobaba, N. Popovic, A.Savic, V. Vasiljevic, H. Stefanovic, M. Ilic, “Computer Networking Teaching and Learning Multimedia Education System“, International Business Information Management Association-IBIMA, Proceedings of papers, pp. 8852-8862, Cordoba, Spain, May 30-31, 2021, ISBN 978-0-9998551-6-4, ISSN 2767-9640
https://ibima.org/accepted-paper/computer-networking-teaching-and-learning-multimedia-education-system/
N. Popovic, G. Bjelobaba , H. Stefanovic, “Primena zaštitnog kodovanja i kodova za kontrolu grešaka u sistemu za vrednovanje znanja“, International Symposium on Operations Research-SYM-OP-IS 2021, Proceedings of papers, pp. 255-260, Banja Koviljača, Serbia, September 20-23, 2021, ISBN 978-86-7589-151-2
http://symopis2021.matf.bg.ac.rs/download/Zbornik-SYM-OP-IS2021.pdf
H. Stefanovic, A Savic, N. Popovic, “Application of the One-Time Pad (OTP) cipher in business communications“, International Conference Science and Higher Education in Function of Sustainable Development-SED 2021, Proceedings of papers, pp. 1-23 (1-6), Uzice, Serbia, October 8, 2021, ISBN 978-86-82078-11-1
A. Savic, G. Bjelobaba, N. Popovic, H. Stefanovic, “One-Time Pad Cipher (OTP) Use Cases and Simulation Examples for Electronic Financial Transactions“, International Conference on Business, Technology and Innovation-UBT 2021, Conference Book of Abstracts, pp. 187, Pristina, Kosovo, October 29-30, 2021, ISBN 978-9951-550-47-5
https://knowledgecenter.ubt-uni.net/cgi/viewcontent.cgi?article=3163&context=conference
M. Jevremovic, H. Stefanovic, D. Stojakovic, N. Staletic, “Can we predict the effects of using the interactive features of the website?“, International Conference on Economic Sciences and Business Administration-ICESBA 2021, Book of Abstracts, pp. 127-128, Bucharest, Romania, November 26-27, 2021, ISBN 978-606-20-0475-0, ISSN: 2392-8174 ISSN-L: 2392-8166
https://icesba.eu/pdf/ICESBA_2021.pdf
H. Stefanovic, R. Veselinovic, G. Bjelobaba, A. Savic, “Primena vizuelne kriptografije u procesu deljenja informacija o vozilima parkiranim u krugu kompanije“, International Symposium on Operations Research-SYM-OP-IS 2020, Proceedings of papers, pp. 143-148, Belgrade, Serbia, September 20-23, 2020, ISBN 978-86-7395-429-5
https://symopis.sf.bg.ac.rs/download/Zbornik%20SYMOPIS%202020.pdf
H. Stefanovic, S. Janicijevic, G. Bjelobaba, A Savic, “An application of K-means clustering for customer segmentation in one luxury goods company“, International Conference Science and Higher Education in Function of Sustainable Development-SED 2019, Proceedings of papers, pp. 2-15 – 2-21, Mecavnik-Drvengrad, Uzice, Serbia, May 24-25, 2019, ISBN 978-86-83573-95-0
H. Stefanovic, R. Veselinovic, G. Bjelobaba, A. Savic, “Primena Hough-ove transformacije i različitih tehnika povezivanja detektovanih ivica prilikom izdvajanja registarskih tablica u digitalnoj slici“, International Symposium on Operations Research-SYM-OP-IS 2019, Proceedings of papers, pp. 226-231, Kladovo, Serbia, September 15-18, 2019, ISBN 978-86-7680-363-7
http://symopis2019.fon.bg.ac.rs/download/SYM-OP-IS%202019%20Proceedings.pdf
H. Stefanovic, N. Davidovic, V. Vasiljevic, S. Obradovic, “Primena novih tehnologija i programa za procenu parametara pozicioniranja satelitske prijemne antene“, International Scientific Conference Contemporary Materials 2019, Proceedings of papers, Book LII, pp. 191-201, Banja Luka, Bosnia and Herzegovina, September 1-3, 2019, ISBN 978-99976-42-30-1
http://savremenimaterijali.info/index.php?idsek=26
V. Vasiljevic, H. Stefanovic, S. Obradovic, A. Savic, “Some advantages of multi-beam transmit diversity scheme in wireless communication system“, International Scientific Conference UNITECH 2019, Proceedings of papers, Vol. 1, pp. I-306–I-310, Gabrovo, Bulgaria, November 15-16, 2019, ISSN 1313-230X
H. Stefanovic, I. Tepsic, D. A Cucic, “Mihajlo Pupin: Naučni radovi, naučni skupovi, predavanja (1890-1900)“, Phlogiston 30/2022, pp. 221-258, 2022, ISSN 0354-6640, ISSN (Online) 2620-1720, UDC 51:929
https://www.muzejnt.rs/programi-i-desavanja/casopis-flogiston
https://www.scribd.com/document/616566806/Flogiston-30
G. Zajić, N. Slavković, A. Slavković, H. Stefanović, “Sajber bezbednost i razvoj kriptovaluta”, Akademija tehničkih strukovnih studija Beograd, 2023, ISBN 978-86-7498-107-8