Company Info for ote.gr | IcebreakerMembers
Providing services to select companies to bridge strategy with execution and align business objectives with measurable outcomes. Whether launching, transforming or scaling a brand, I help businesses turn challenges into clear paths forward.
My experience across large-scale organizations and multiple industries has shaped a cross-functional view, hands-on approach and collaborative mindset.
Worked on both agency and client side for significant brands such as OTE, COSMOTE, Germanos, IKEA, P&G, WIND Hellas, Συμβούλιο Ελέγχου Επικοινωνίας, ΦΑΓΕ, Athens 2004 Olympic & Paralympic Games, Gr. Sarantis, ΒΡ Fuels, Mattel. 
Professional Experience:
* Researcher in Information Retrieval, Data Mining Algorithms & Applications, Algorithms on Strings, Trees, and Sequences, Huge Data Manipulation (Data Bases, Data Streams, XML Data), Software Code Quality Measurement and Social Network Analysis.
* Web Application Developer
* Product Manager
* Project Manager
* RDBMS Administrator
* Resource Management Tools & Operations
Goals:
* Working in a challenging environment with respectable people.
* I am interested in opportunities which will push me out of my comfort zone and challenge myself more.
Specialties:
* Data Analysis & Data Acquisition: Weka, SPSS, Matlab, Scikit-Learn
* Programming in PHP (Yii, Zend, Symfony), QT (C++), Perl, Python (Django), C#, Delphi, JavaScript, NodeJs/ReactJs, .NET (MVC)
* Enterprise-level CDP & CMS: Netvolution, Drupal; Architecture design
* Databases: MySQL, MongoDB, SQL Server
* Search/Analytics: Solr &ElasticSearch
* Building & Deploying Applications: Phing, AWS (S3, EC2), Rackspace
* Technical Writing
* Version Control: Subversion, GIT, Mercurial
* Testing: JMeter, Selenium, SoapUI, Firebug, Fiddler 
Posts always reflect my personal views!
Cofounder and Chief Cryptographer at MystenLabs. Ex-Facebook cryptography lead (Libra, Novi, WhatsApp) and previously head of research at R3 (UK) for the Corda blockchain and Conclave SGX. Before that, a CTO in two Security + Big Data companies, Erybo (CA) and Safemarket (GR).
Technical Summary and Achievements:
• Ranked in the Top20 StackOverflow users coming from Greece (on Java related questions) and 1st between recent Greek StackOverflow members joined StackOverflow after 2014.
• 20+ years in software engineering acting as a Team Leader and Lead Software Developer in various US, UK and Greek based entities. CTO for 6 years in a Big Data and Security oriented US-based startup.
• An active Cryptography and Big Data researcher, currently focusing on blockchain security and novel smart contracts, post quantum signatures and zero knowledge proofs.
• Have published more than 50 scientific papers, mainly known for my work in Zero Knowledge Proofs, EdDSA scheme, Base64 attacks, Proofs of solvency community standard lead, Timed-Release Encryption, Graphical Passwords, the Saferandom protocol and Key-Compromise attacks having proposed some of the fastest protocols in the field and analysed potential attack vectors.
• Have received a Best Paper award for 3 times, filed 8 US patents, ranked 1st in Computer Science MSc studies, received one of the most appreciated national scholarship programs (4 years in a row) and ranked on the Top3 in National IT Innovation Contests twice.
• Teaching Assistant for ~10 years at the University of Macedonia (Java, R, Cryptography, Chaos Theory, Statistics).
• Founder of the largest Big Data Meetup group in Athens, Greece, with a healthy and growing community of 2000+ members. 
Completed various project pre-sales/solution architectures and project deliveries in online TV/IPTV/OTT & Media Industry from 2007 to 2020. My indicative responsibilities were Solutions Architecture, Systems Integration, IP network design, High Availability Systems design and implementation, Database design, Technical Project Leadership and Technical Coordination, etc. My past employers are OTE S.A, Ericsson (and Mediakind, the spinoff company from BU Media) and Deutsche Telekom Pan-Net.
I was responsible for the coordination of the Ericsson IPTV & Satellite TV support team in Greece as the local TV team leader from 2008 to 2016.
In 2021, I changed my focus to Fintech Industry by joining ChannelVAS, and since March 2022, I have joined Netcompany-Intrasoft Banking Solutions & Services as a Solutions Architect and have been assigned full time to Cosmote Payments technology team. 
