Natasa Ntavou

Key Skills

Software

Labelbox

Label Studio

Top Subject Matter

No subject matter listed

Top Data Types

Audio

Image

Text

Top Task Types

Bounding Box

Classification

Entity Ner Classification

Evaluation Rating

Segmentation

Freelancer Overview

I have hands on experience in data labeling for text, audio, and image datasets, both in English and Greek. My projects include text classification, entity recognition, and LLM evaluation, as well as image annotation for mapping and computer vision. I specialize in audio transcription and segmentation, delivering precise, high-quality datasets for speech recognition. With a background in multidisciplinary design projects and academic studies in the creative field, I bring strong analytical, detail-oriented, and problem-solving skills to AI training data tasks.

Labeling Experience

Multilingual Audio Annotation & Transcription

LabelboxAudioSegmentationClassification

Specialized in audio annotation for both English and Greek datasets, with a focus on transcription, segmentation, and intent classification. Tasks included aligning transcripts to audio with high timestamp precision, labeling speaker turns, and evaluating ASR (automatic speech recognition) outputs for quality. Built expertise in handling noisy recordings, dialectal variations, and context-specific speech patterns. Delivered large annotated datasets with high accuracy, making audio annotation my primary area of expertise.

Specialized in audio annotation for both English and Greek datasets, with a focus on transcription, segmentation, and intent classification. Tasks included aligning transcripts to audio with high timestamp precision, labeling speaker turns, and evaluating ASR (automatic speech recognition) outputs for quality. Built expertise in handling noisy recordings, dialectal variations, and context-specific speech patterns. Delivered large annotated datasets with high accuracy, making audio annotation my primary area of expertise.

2023

Image Annotation for Mapping Applications

LabelboxImageBounding BoxPolygon

Contributed to image annotation projects for mapping applications, labeling satellite and street imagery. Used bounding boxes, polygons, and polylines to annotate roads, buildings, and landmarks for geocoding and navigation tasks. Applied segmentation techniques for land cover classification and maintained annotation consistency across thousands of samples. Strengthened skills in computer vision dataset preparation with a focus on geospatial accuracy.

Contributed to image annotation projects for mapping applications, labeling satellite and street imagery. Used bounding boxes, polygons, and polylines to annotate roads, buildings, and landmarks for geocoding and navigation tasks. Applied segmentation techniques for land cover classification and maintained annotation consistency across thousands of samples. Strengthened skills in computer vision dataset preparation with a focus on geospatial accuracy.

2024 - 2024

Text Annotation & LLM Evaluation

LabelboxTextEntity Ner ClassificationText Summarization

Annotated English and Greek text for classification, sentiment, and NER tasks. Evaluated LLM outputs, performed summarization, and supported fine-tuning with accurate multilingual datasets.

Annotated English and Greek text for classification, sentiment, and NER tasks. Evaluated LLM outputs, performed summarization, and supported fine-tuning with accurate multilingual datasets.

2023 - 2023

Education

Work History