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Geofrey Nyangacha

Geofrey Nyangacha

Data Annotator - AI & Machine Learning

KENYA flag
Nairobi, Kenya
$12.00/hrIntermediateTelus

Key Skills

Software

TelusTelus

Top Subject Matter

No subject matter listed

Top Data Types

VideoVideo

Top Label Types

Segmentation
Action Recognition
Evaluation Rating

Freelancer Overview

Detail-oriented AI Data Specialist & Evaluator with over a year of experience at TELUS International supporting Large Language Model (LLM) development. Expert in RLHF, text classification, and sentiment analysis using platforms like MultiMango and Labelbox. Armed with a triple certification from HP LIFE (Critical Thinking, AI for Business, and AI Foundations), I specialize in identifying model hallucinations and ensuring logical consistency. I combine technical expertise in data labeling with a strategic understanding of AI’s business applications to deliver high-quality, responsible machine learning datasets.

IntermediateEnglishSwahili

Labeling Experience

Telus

DATA LABELLER

TelusVideoSegmentationAction Recognition
The TELUS SONIC project involved audio data labeling at scale to improve speech recognition and conversational AI systems. The project scope required reviewing and annotating various audio data types. The data types included various accents, speech clarity levels, and noise conditions. The project aimed to improve the robustness of speech recognition and conversational systems. The project activities included audio transcription, speech segmentation, speaker identification, and labeling non-speech events such as noise, silence, and speech overlaps. The activities were performed according to strict SONIC annotation guidelines. The project activities involved handling high-volume data with thousands of audio files. The activities were performed within daily productivity and accuracy requirements. The quality indicators included adherence to strict labeling guidelines, multi-stage quality assurance activities, inter-annotator agreements, spot audits, and continuous feedback.

The TELUS SONIC project involved audio data labeling at scale to improve speech recognition and conversational AI systems. The project scope required reviewing and annotating various audio data types. The data types included various accents, speech clarity levels, and noise conditions. The project aimed to improve the robustness of speech recognition and conversational systems. The project activities included audio transcription, speech segmentation, speaker identification, and labeling non-speech events such as noise, silence, and speech overlaps. The activities were performed according to strict SONIC annotation guidelines. The project activities involved handling high-volume data with thousands of audio files. The activities were performed within daily productivity and accuracy requirements. The quality indicators included adherence to strict labeling guidelines, multi-stage quality assurance activities, inter-annotator agreements, spot audits, and continuous feedback.

2024

Education

M

Moi University

Bachelor of Business, Maritime Management

Bachelor of Business
2017 - 2022

Work History

R

REMOTE

DATA ANNOTATOR

Nairobi
2024 - Present