Juwon Betiku

Key Skills

Software

Appen

Top Subject Matter

AI Model Training/Data Quality

AI/Analytics Data Operations

Compliance/Data Validation

Top Data Types

Text

Document

Top Task Types

Object Detection

Classification

Freelancer Overview

Senior Data Quality Manager. Brings 2+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Appen, Internal, and Proprietary Tooling. Education includes Bachelor of Science, University of Lagos (UNILAG) (2012). AI-training focus includes data types such as Text and Document and labeling workflows including Evaluation and Rating.

Labeling Experience

Senior Data Quality Manager

AppenText

In this role, I reviewed and annotated AI model outputs using complex multi-step rubrics for enterprise training data. I managed a team of data annotators, maintained evaluation frameworks, and collaborated with machine learning engineers to enhance data quality. I also provided structured feedback and refined annotation guidelines to boost consistency and quality across workflows. • Maintained annotation accuracy rates above 95% in high-volume pipelines. • Identified subtle errors, edge cases, and flagged ambiguous cases for process improvement. • Built standard checklists and frameworks to improve reviewer calibration. • Reduced rework rates by approximately 35% via process documentation and guideline feedback.

In this role, I reviewed and annotated AI model outputs using complex multi-step rubrics for enterprise training data. I managed a team of data annotators, maintained evaluation frameworks, and collaborated with machine learning engineers to enhance data quality. I also provided structured feedback and refined annotation guidelines to boost consistency and quality across workflows. • Maintained annotation accuracy rates above 95% in high-volume pipelines. • Identified subtle errors, edge cases, and flagged ambiguous cases for process improvement. • Built standard checklists and frameworks to improve reviewer calibration. • Reduced rework rates by approximately 35% via process documentation and guideline feedback.

2022 - Present

Data Operations Manager

Text

I managed structured data evaluation and review workflows for AI and analytics projects, applying complex rubrics to support deliverable quality for thousands of users. I implemented quality tracking dashboards, identified inconsistencies, and coordinated team efforts to maintain data quality across multiple client accounts. I also assessed vendor datasets and model outputs, ensuring data completeness and supporting proactive data specification clarification. • Led quality reviews for model outputs using multi-step evaluation criteria. • Developed documentation and dashboards to support decision consistency. • Collaborated with data science teams to track accuracy and error patterns. • Flagged and resolved ambiguous specifications in client deliverables.

I managed structured data evaluation and review workflows for AI and analytics projects, applying complex rubrics to support deliverable quality for thousands of users. I implemented quality tracking dashboards, identified inconsistencies, and coordinated team efforts to maintain data quality across multiple client accounts. I also assessed vendor datasets and model outputs, ensuring data completeness and supporting proactive data specification clarification. • Led quality reviews for model outputs using multi-step evaluation criteria. • Developed documentation and dashboards to support decision consistency. • Collaborated with data science teams to track accuracy and error patterns. • Flagged and resolved ambiguous specifications in client deliverables.

2018 - 2022

Operations Analyst

Document

I supported data quality review and validation tasks on multiple consulting engagements by following structured guidelines for error detection. I performed structured annotation, document review, and applied consistent criteria for audit and compliance deliverables. My work contributed to high accuracy and improved output quality across concurrent workflows. • Conducted annotation tasks and flagged edge cases to support quality assurance. • Prepared review reports and maintained high accuracy across audit workflows. • Applied rubrics to ensure compliance in data deliverables. • Supported multiple teams in delivering accurate and validated documents.

I supported data quality review and validation tasks on multiple consulting engagements by following structured guidelines for error detection. I performed structured annotation, document review, and applied consistent criteria for audit and compliance deliverables. My work contributed to high accuracy and improved output quality across concurrent workflows. • Conducted annotation tasks and flagged edge cases to support quality assurance. • Prepared review reports and maintained high accuracy across audit workflows. • Applied rubrics to ensure compliance in data deliverables. • Supported multiple teams in delivering accurate and validated documents.

2017 - 2018

Education

Work History