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Hillary Osei

Hillary Osei

AI Data Annotator

USA flagLoganville, Usa
$40.00/hrExpertMicro1MercorRemotasks

Key Skills

Software

Micro1
MercorMercor
RemotasksRemotasks
TelusTelus
Internal/Proprietary Tooling
Other

Top Subject Matter

Large Language Models
Search Domain Expertise
Tech Domain Expertise

Top Data Types

TextText
AudioAudio
VideoVideo
DocumentDocument

Top Task Types

ClassificationClassification
Object DetectionObject Detection
Text GenerationText Generation
Question AnsweringQuestion Answering
Text SummarizationText Summarization
RLHFRLHF
Evaluation/RatingEvaluation/Rating
Data CollectionData Collection
Prompt + Response Writing (SFT)Prompt + Response Writing (SFT)

Freelancer Overview

AI Data Annotator. Brings 3+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Internal and Proprietary Tooling. Education includes Master of Science, Western Governors University (2025) and Bachelor of Arts, New York University (2022). AI-training focus includes data types such as Text and Audio and labeling workflows including Evaluation, Rating, and Classification.

ExpertEnglishSpanish

Labeling Experience

AI Data Annotator

TextEvaluation Rating
As an AI Data Annotator at Welocalize, I evaluated outputs from Large Language Models for accuracy and user intent alignment. I assessed search relevance and provided ground truth annotations across domains including tech, education, medicine, and culture. My efforts contributed to improving LLM performance and mitigating biased or harmful outputs. • Reviewed and rated AI-generated responses for factual accuracy and relevance • Labeled data to create training sets for AI model improvement • Used proprietary tools in human-in-the-loop workflows for annotation • Ensured compliance with safety and quality guidelines

As an AI Data Annotator at Welocalize, I evaluated outputs from Large Language Models for accuracy and user intent alignment. I assessed search relevance and provided ground truth annotations across domains including tech, education, medicine, and culture. My efforts contributed to improving LLM performance and mitigating biased or harmful outputs. • Reviewed and rated AI-generated responses for factual accuracy and relevance • Labeled data to create training sets for AI model improvement • Used proprietary tools in human-in-the-loop workflows for annotation • Ensured compliance with safety and quality guidelines

2023 - Present

English Linguistic Tester

AudioClassification
As an English Linguistic Tester, I labeled and annotated audio and video data for Apple's voice assistant training. I performed linguistic QA on AI-generated text and search responses, validating semantic relevance and tone. Structured guidelines and internal tools were used to ensure high throughput and consistent annotation. • Labeled intent, tone, accuracy, and regional/cultural consistency • Annotated audio and video for NLP and voice assistant optimization • Utilized detailed annotation guidelines and internal tools • Flagged bias, ambiguity, and errors to support responsible AI

As an English Linguistic Tester, I labeled and annotated audio and video data for Apple's voice assistant training. I performed linguistic QA on AI-generated text and search responses, validating semantic relevance and tone. Structured guidelines and internal tools were used to ensure high throughput and consistent annotation. • Labeled intent, tone, accuracy, and regional/cultural consistency • Annotated audio and video for NLP and voice assistant optimization • Utilized detailed annotation guidelines and internal tools • Flagged bias, ambiguity, and errors to support responsible AI

2023 - 2024

Education

N

New York University

Bachelor of Arts, Algorithmic Bias and Intersectional Critique in the Digital Age

Bachelor of Arts
2022 - 2022
W

Western Governors University

Master of Science, Data Analytics

Master of Science
2025

Work History

H

Harvester Investment Corporation

Data Quality Analyst

Decatur, GA
2020 - 2022