Stella V.

Key Skills

Software

Internal/Proprietary Tooling

Top Subject Matter

Greek and English Language

Natural Language Processing

AI Safety

Top Data Types

Text

Document

Top Task Types

RLHF

Evaluation/Rating

Transcription

Data Collection

Freelancer Overview

As a Greek Language Specialist and AI Data Trainer with a Master of Arts in English and Greek Language, Linguistics, and Translation (Honors) from the National and Kapodistrian University of Athens, I offer a unique combination of high-level academic research and hands-on experience in large language model (LLM) optimization. Currently, I serve as an AI Data Trainer at Invisible Technologies, where I evaluate model-generated responses for fluency, factual accuracy, and cultural nuance to improve Greek language capabilities. My expertise includes auditing for "hallucinations," refining regional dialects and idioms, and ensuring Al outputs maintain a natural, human-like flow. With a background that spans corpus linguistics, computational linguistics, and professional copyediting, I bring the technical precision and logical reasoning necessary to align complex datasets with rigorous client-specific standards.

Labeling Experience

AI Data Trainer | Greek Language Specialist

TextEvaluation/Rating

In my current role as a Greek Language Specialist and AI Data Trainer at Invisible Technologies, I evaluate and rate model-generated responses to enhance the linguistic capabilities and accuracy of a Large Language Model. My work involves providing granular feedback on fluency, tone, and grammatical precision while auditing outputs for "hallucinations" by verifying factual consistency against trusted sources. By identifying and correcting subtle nuances, idioms, and regional dialects, I ensure that AI outputs maintain cultural relevance and a natural, human-like flow for the Greek-speaking world. Additionally, I apply complex evaluation methodologies and safety guardrails mastered during specialized immersion training to ensure high-reliability performance and alignment with strict data standards.

2025 - Present

Education

Work History