Harizon O.

Key Skills

Software

Labelbox

Scale AI

Prodigy

CVAT

Supervisely

Roboflow

Label Studio

Dataloop

Google Cloud Vertex AI

Other

Top Subject Matter

Computer vision (object detection, bounding boxes, image classification, scene understanding)

Natural language processing (sentiment analysis, entity recognition, text categorization, content moderation)

Audio (transcription, speaker identification, audio classification, quality verification)

Top Data Types

Image

Text

Audio

Document

Top Task Types

Object Detection

Transcription

Classification

Freelancer Overview

Data Labeler & Annotator (Self-Employed / Project-Based) — Image Annotation. Brings 3+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Other. Education includes Diploma in Information and Communication Technology, PC Kinyanjui Technical Training Institute (2026) and Secondary School Diploma, Ombeyi Secondary School (2021). AI-training focus includes data types such as Image, Text, and Audio and labeling workflows including Object Detection, Entity (NER), and Transcription.

Labeling Experience

Data Labeler & Annotator (Self-Employed / Project-Based) — Audio Annotation

OtherAudioTranscription

Transcribed and labeled audio files for speech recognition systems and related audio models. Labeled audio content using provided instructions while performing quality verification to ensure accurate outputs. Maintained strong accuracy rates by following guidelines and handling multiple concurrent projects. • Audio transcription and labeling • Speaker identification support • Audio classification and quality verification • Consistent guideline-based annotation across tasks

2024 - Present

Data Labeler & Annotator (Self-Employed / Project-Based) — Text Annotation

OtherText

Annotated and categorized text data for natural language processing tasks, including entity recognition and classification. Applied sentiment-related labels and supported content moderation style labeling based on provided guidelines. Ensured annotation accuracy and consistency to help improve model performance. • Text categorization and sentiment labeling • Entity recognition (NER) and classification • Content moderation and quality checks • Followed complex guidelines for consistent labeling

2024 - Present

Data Labeler & Annotator (Self-Employed / Project-Based) — Image Annotation

OtherImageObject Detection

Provided image labeling and classification for computer vision projects, including identifying objects and relevant features in diverse datasets. Maintained high consistency by following complex annotation guidelines and quality standards. Supported downstream ML training by ensuring reliable annotations and correcting inaccuracies when found. • Object identification and feature/entity labeling • Image classification and scene understanding • Consistency checks across multi-project workloads • Quality feedback on annotation issues

2024 - Present

ICT Assistant — Data Support Role (Kibera Human Needs Project)

OtherDocumentClassification

Supported data organization and quality assurance activities by categorizing records and validating entries with high accuracy. Contributed to database organization and record keeping to maintain clean, usable datasets. Focused on guideline-following and attention to detail to support reliable data for analytical or AI-related use. • Data entry and validation with high accuracy • Data organization and categorization • Database record keeping and organization support • Data quality assurance and consistency checks

2024 - 2025

Education

Work History