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R
Racheal Oginni

Racheal Oginni

Freelance Data Annotation Specialist (AI/ML Projects)

USA flagSt. Louis, Usa
$45.00/hrIntermediateData Annotation TechAppenMicro1

Key Skills

Software

Data Annotation TechData Annotation Tech
AppenAppen
Micro1
Other

Top Subject Matter

AI/ML Dataset Labeling
Project/Program Management
Regulatory Compliance & Risk Analysis

Top Data Types

TextText
ImageImage
AudioAudio
DocumentDocument

Top Task Types

ClassificationClassification
Bounding BoxBounding Box
SegmentationSegmentation
Object DetectionObject Detection
Text SummarizationText Summarization
TranscriptionTranscription
Evaluation/RatingEvaluation/Rating
Data CollectionData Collection
Prompt + Response Writing (SFT)Prompt + Response Writing (SFT)
Function CallingFunction Calling
Fine-tuningFine-tuning
Question AnsweringQuestion Answering
Text GenerationText Generation

Freelancer Overview

Freelance Data Annotation Specialist (AI/ML Projects) with 5+ years of professional experience across program management, operations, compliance, and structured analysis. Core strengths include quality assurance, detailed annotation review, pattern recognition, and providing structured, actionable feedback to improve AI model performance and output reliability. Education includes Master of Business Administration, Washington University in St. Louis (2025) and Bachelor of Science, Obafemi Awolowo University (2018). AI-training focus includes data types such as Text, Image, and Audio and labeling workflows including classification, categorization, and quality evaluation, with consistent adherence to annotation guidelines and high accuracy standards.

IntermediateEnglishYorubaSpanish

Labeling Experience

Freelance Data Annotation Specialist (AI/ML Projects)

OtherTextClassification
As a Freelance Data Annotation Specialist, I delivered high-quality annotations for large-scale AI/ML datasets encompassing text, image, and audio data. I maintained a high level of annotation accuracy by following detailed guidelines and conducting thorough self-QA reviews to ensure data consistency. My work contributed to improving AI/ML model performance across multiple client projects. • Achieved ≥98% annotation accuracy rate through rigorous process. • Collaborated with distributed annotation teams via online platforms. • Identified and documented edge cases and data inconsistencies. • Provided structured feedback to update annotation guidelines and model outputs.

As a Freelance Data Annotation Specialist, I delivered high-quality annotations for large-scale AI/ML datasets encompassing text, image, and audio data. I maintained a high level of annotation accuracy by following detailed guidelines and conducting thorough self-QA reviews to ensure data consistency. My work contributed to improving AI/ML model performance across multiple client projects. • Achieved ≥98% annotation accuracy rate through rigorous process. • Collaborated with distributed annotation teams via online platforms. • Identified and documented edge cases and data inconsistencies. • Provided structured feedback to update annotation guidelines and model outputs.

2025 - Present

Education

P

Project Management Institute

Project Management Professional Certificate, Project Management

Project Management Professional Certificate
2025 - 2025
W

Washington University in St. Louis

Master of Business Administration, Business Administration

Master of Business Administration
2023 - 2025

Work History

U

US Bank

Banker

St. Louis
2026 - Present
W

Washington University in St. Louis

Student Program Manager

St. Louis
2024 - 2025