Stelios Lelis

Chief Data & Risk Officer, Optasia

Stelios has over 25 years’ experience in building and guiding the development of reliable, result-driven algorithms and cutting-edge machine learning solutions in various application fields. He is responsible for the development of innovative credit risk models for nano- and micro-finance, and his deep knowledge of algorithmic trends allow for the successful risk management of more than 300 million active users and more than $4 billion USD in loans granted annually.

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Stelios Lelis

Upcoming Sessions

Disrupt Lead AI Forum

October, 14, 2025
17:40 -
18:20 EEST
30' MINS
Integrating AI into Core Systems & Strategic Infrastructure
[Panel Discussion] AI in Enterprise IT & Cloud: Overcoming Legacy System Challenges
Many enterprises face significant challenges when attempting to integrate AI into legacy IT environments. This session will explore practical strategies for modernizing outdated infrastructure, transitioning to AI-powered cloud architectures, and strengthening cybersecurity resilience. From system interoperability to risk mitigation, we’ll unpack the technical and organizational levers needed to transform legacy systems into AI-ready foundations.
Thanasis Navrozoglou
Thanasis Navrozoglou
CEO, Natech Banking Solutions | Co-founder & Vice Chairman, Snappi
Emmanouil Serrelis
Emmanouil Serrelis
Group CTO, Alphabet Education Group
Kostas Ketsietzis
Kostas Ketsietzis
Business Editor, Insider
Dimitris Tsingos
Dimitris Tsingos
Co-Founder, President & CEO, Epignosis Learning Technologies
Stelios Lelis
Stelios Lelis
Chief Data & Risk Officer, Optasia

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