antonios kokkalis
@antonioskokkalis
I am a Greek language specialist and AI trainer delivering precise annotated datasets.
GreeceWhat I'm looking for
I am an experienced Greek Language Specialist and AI Trainer with hands-on practice in data annotation, transcription, and linguistic quality assurance. I have contributed to improving large language models by producing high-accuracy labeled datasets and providing consistent, actionable feedback on grammar, fluency, factual accuracy, and cultural relevance.
Comfortable working with international remote teams, I apply tools such as Label Studio and Diffgram and pair linguistic expertise with practical web and SEO experience from running a travel site and managing digital campaigns. My background across customer support, sales, market analysis and programming gives me a cross-functional perspective that enhances data quality and model outcomes.
Experience
Work history, roles, and key accomplishments
Transcription & Categorization Specialist
Sigma AI
Feb 2025 - Jun 2025 (4 months)
Transcribed and categorized Greek audio data with strict adherence to guidelines, ensuring linguistic accuracy and cultural appropriateness for training datasets.
Greek Language Specialist
Invisible Technologies
Mar 2024 - Apr 2025 (1 year 1 month)
Conducted high-accuracy data annotation and citation evaluation for AI training, improving linguistic quality of Greek datasets and providing QA feedback to model teams.
Customer Support & Sales
Netone SA
Aug 2007 - Jul 2021 (13 years 11 months)
Provided customer service via phone and email and executed sales and upselling strategies to support revenue growth and customer retention.
Market Analyst
Eurobank Ergasias
Mar 2005 - Jun 2007 (2 years 3 months)
Conducted technical market analysis and advised on investment strategies to inform client decision-making and portfolio recommendations.
Regional Sales Manager
Panrico SA
Mar 2002 - Sep 2004 (2 years 6 months)
Led regional sales teams and executed strategic growth plans to expand market share and improve sales performance.
Customer Service Representative
Ergobank SA
Jan 1992 - Feb 2002 (10 years 1 month)
Managed daily customer requests and service responsibilities, maintaining high client satisfaction and efficient account handling.
Programmer
EVGA AVEE
Jan 1990 - Dec 1991 (1 year 11 months)
Developed applications on IBM AS/400 using COBOL, Pascal, and C++, supporting internal systems and operations.
Education
Degrees, certifications, and relevant coursework
antonios hasn't added their education
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Tech stack
Software and tools used professionally
Availability
Location
GreeceAuthorized to work in
Job categories
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