What people are saying.
“Although Ioannis joined the PCRF/PCF engineering area relatively recently, he quickly took ownership of an impressive and growing number of tasks. He delivered comprehensive analyses on CPU usage limits, charging migration, and product compatibility, always showing high quality, collaboration, and willingness to share knowledge across teams.”
Marco Vecchiato, Supplier & Roadmap Management Senior Engineer, Vodafone IT, 2026“Ioannis brings exceptional expertise, reliability, and a very positive attitude. His deep technical knowledge, willingness to help, and consistent contributions add real value to the team and projects”
David Sánchez, Specialist E2E Solution Architect, Vodafone SP, 2026“Ioannis delivers high-quality work aligned with Vodafone’s priorities. His commitment to excellence, technical expertise, and creative problem-solving have a significant impact on project outcomes.”
Dimitrios Apostolakis, Data Core Engineering & Delivery Senior Engineer, Vodafone GR , 2025“Ioannis approaches technical challenges with strong attention to detail and accuracy. He is proactive, curious, and engaged, anticipating risks before they arise and bringing valuable insight even when working on new or unfamiliar topics.”
Carmen Manzillo, Data Platforms & Smart Services Senior Engineer, Vodafone IT, 2025“Ioannis pays close attention to customer needs and requirements. Even in complex network environments, he simplifies problems, delivers the requested feasibility work, and addresses the real technical issues with ownership and quality.”
Ioanna Markaki, Data Platforms Senior Engineer, Vodafone GR, 2024“Ioannis is supportive, collaborative, and consistently produces high-quality work. He listens, shares information openly, and makes it easy for colleagues to ask for his support.”
Çiğdem Atar, Data Core Planning Expert, Vodafone TR, 2024“Ioannis is careful, reliable, and always willing to do his best, with a clear focus on objectives and end-customer experience. He listens, shares information openly, and brings a positive and supportive attitude that makes collaboration easy.”
Maria Concetta Carnuccio, New Services Application Manager, Vodafone SP, 2023“Ioannis has shown strong leadership and critical thinking when tackling innovation challenges, from Mobile Private Networks to MEC deployment on AWS. He contributes with vision, explores new ways of working, and helps teams move forward by combining technical insight, business value, and collaborative spirit.”
María Purificación Puebla, Speciaist Demand Manager, Vodafone SP, 2023During his PhD, Ioannis proved to be an exceptional doctoral researcher, combining strong analytical thinking, technical depth, and a highly independent working style. He produced high-quality research outputs, including strong publications in 5G, MEC, cost-aware Network Function placement and lifecycle management, with clear academic impact and strong citation performance. He led the development of innovative experimental testbeds, ran extensive validation experiments, and evaluated 5G-oriented optimization algorithms with both theoretical and practical relevance. His ability to transform complex research problems into concrete, reproducible engineering results made him a valuable member of the research group and a pleasure to supervise.
Angelos Antonopoulos, Research and Innovation Director, Nearby Computing, 2022I supervised Yiannis during part of his PhD research at Iquadrat. He consistently demonstrated strong technical expertise, analytical thinking, and research independence, with the ability to address complex challenges in 5G networks, specifically in NFV orchestration, MEC, and latency-aware resource allocation. He is highly motivated, collaborative, and capable of delivering high-quality research and development outcomes.
Elli Kartsakli, Senior Telecommunications Researcher, Iquadrat Informatica, 2019“Alerta (Nagios alerting) was a clear success story, and Yiannis’ involvement in the project was critical. He provided requirements, tested and troubleshot issues, coordinated with internal teams and external vendors, and handled challenges in the right way. Throughout the year, he brought quality to the position and the team while also mentoring colleagues and supporting difficult monitoring and troubleshooting tasks.”
Giorgos Atsaros, Support Manager, Upstream Systems, 2017“Yiannis showed significant growth as an engineer during the year, working independently and consistently within the team’s targets. He helped newer team members adapt to our processes, communicated well across teams, and brought a strong sense of ownership to his work. When assigned the challenging alerting infrastructure setup project, he delivered solid results and added real value to the team.”
Giorgos Atsaros, Support Manager, Upstream Systems, 2016“Ioannis delivered excellent work during his time as a research assistant at the Media Networks Laboratory of NCSR Demokritos. He handled OpenStack installation and configuration, server maintenance, and system administration with professionalism and skill. He also contributed to major European research projects, demonstrating strong technical expertise in cloud computing and network technologies.”
Dr. Anastasios Kourtis, Director, Media Networks Laboratory, NCSR Demokritos, 2014“Ioannis is highly skilled in Cloud Computing and computer infrastructure management. During our collaboration, he demonstrated strong organizational skills, excellent teamwork, and a consistent eagerness to learn. His critical thinking and ability to handle complex tasks make him an exceptional professional.”
Dr. Anastasios Kourtis, Director, Media Networks Laboratory, NCSR Demokritos, 2013“Ioannis stood out as one of the top students in our engineering program. Throughout his thesis and practical work, he demonstrated exceptional discipline, strong analytical skills, and the ability to deliver high-quality results under demanding deadlines. His teamwork, dedication, and passion for research make him an outstanding candidate with great potential for future innovation.”
Assoc. Prof. Charalabos Skianis, Head of Department, University of the Aegean, 2013