kostas xatzakos
@kostasxatzakos
I build backend APIs and applied machine learning systems.
GreeceWhat I'm looking for
I've built and unit-tested C#/.NET backend APIs and core services at Arx.net for a streaming platform, refining OAuth authentication and connecting infrastructure with personalized content recommendations.
I'm completing an Integrated Master in Information and Electronic Engineering while building ML/NLP pipelines, including a thesis that predicts CVE vulnerability severity using TF-IDF, Random Forest, Optuna, and DistilBERT.
Experience
Work history, roles, and key accomplishments
Internship
Arx.net
May 2025 - Nov 2025 (6 months)
Developed and unit-tested backend APIs and core services for a streaming platform using C# and .NET. Refined OAuth authentication and integrated backend infrastructure with recommendation systems.
Provided customer support services, handling inquiries and resolving issues to ensure customer satisfaction.
Seasonal Service Staff
Verycoco
Jan 2023 - Dec 2023 (11 months)
Provided seasonal service staff support during peak periods.
Seasonal Service Staff
BattleNet
Jan 2022 - Dec 2022 (11 months)
Provided seasonal service staff support during peak periods.
Seasonal Service Staff
O Kipos
Jan 2018 - Dec 2018 (11 months)
Provided seasonal service staff support during peak periods.
Education
Degrees, certifications, and relevant coursework
International Hellenic University
Integrated Master, Information and Electronic Engineering
2019 -
Pursuing an Integrated Master in Information and Electronic Engineering, with expected graduation in the present year.
Availability
Location
GreeceAuthorized to work in
Salary expectations
Job categories
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