Hellen Onyango

Key Skills

Software

Other

Label Studio

Appen

Clickworker

Top Subject Matter

Voice and Language AI Training

Top Data Types

Audio

Text

Image

Top Task Types

Transcription

Text Generation

Entity Ner Classification

Bounding Box

Classification

Segmentation

Object Detection

Text Summarization

Freelancer Overview

Freelance Annotations and Transcription Specialist. Core strengths include Other. Education includes Bachelor of Arts, University of Nairobi (2022) and Bachelor of Science, NIBS Technical College (2019). AI-training focus includes data types such as Audio and labeling workflows including Transcription, Evaluation, and Rating.

Labeling Experience

Data Labeling and Image Annotation Specialist

Label StudioImageBounding Box

I performed 2D image annotation using bounding boxes, lines, and splines to identify objects like vehicles and pedestrians. My tasks also included polygon and segmentation mapping for precise object outlines and 3D LiDAR point cloud annotation for self-driving car datasets. Additionally, I conducted video annotation and supported text/audio labeling tasks. • Used bounding box and segmentation techniques to annotate images. • Labeled 3D sensor data and performed video tracking tasks. • Transcribed and categorized audio, and evaluated AI-generated text. • Utilized tools to maintain consistent and accurate dataset labeling.

I performed 2D image annotation using bounding boxes, lines, and splines to identify objects like vehicles and pedestrians. My tasks also included polygon and segmentation mapping for precise object outlines and 3D LiDAR point cloud annotation for self-driving car datasets. Additionally, I conducted video annotation and supported text/audio labeling tasks. • Used bounding box and segmentation techniques to annotate images. • Labeled 3D sensor data and performed video tracking tasks. • Transcribed and categorized audio, and evaluated AI-generated text. • Utilized tools to maintain consistent and accurate dataset labeling.

2022 - Present

AI Data Annotation and Content Review Specialist

Label StudioTextEntity Ner Classification

I reviewed and corrected AI-generated text to enhance accuracy and clarity for various machine learning models. My responsibilities included annotating and labeling datasets, ensuring alignment with linguistic guidelines, and identifying errors in transcription and segmentation. I worked under tight deadlines while maintaining high standards of quality and consistency. • Labeled and categorized text-based data for AI model training. • Annotated dialogues based on tone, sentiment, and context. • Flagged ambiguous or low-quality data for further review. • Ensured output met strict quality benchmarks.

I reviewed and corrected AI-generated text to enhance accuracy and clarity for various machine learning models. My responsibilities included annotating and labeling datasets, ensuring alignment with linguistic guidelines, and identifying errors in transcription and segmentation. I worked under tight deadlines while maintaining high standards of quality and consistency. • Labeled and categorized text-based data for AI model training. • Annotated dialogues based on tone, sentiment, and context. • Flagged ambiguous or low-quality data for further review. • Ensured output met strict quality benchmarks.

2022 - Present

Education

Work History