Open to opportunities

David Bassey

@davidbassey

Message

AI data annotation specialist focused on improving NLP/LLM performance and data quality.

Nigeria

Message

What I'm looking for

I seek senior roles where I can lead data annotation and quality programs for NLP/LLM, working in collaborative, growth-focused AI teams that value accuracy, scalable processes, and impact.

I am an AI data annotation specialist and NLP/LLM practitioner with extensive experience creating, verifying, and improving datasets for machine learning systems. I have led and delivered data labeling and quality programs across multiple projects and clients, leveraging tools for text and image annotation and driving measurable improvements in AI relevance and performance.

My background includes founder-level leadership of a data-labeling services company, hands-on roles as a senior data quality specialist and evaluator for search and generative AI, and technical proficiency in Python, AWS, Tableau, and MATLAB. I combine analytics, project oversight, and continuous quality improvement to scale annotation operations and ensure high-fidelity training data for NLP and ML products.

Experience

Work history, roles, and key accomplishments

Current

Online Data Analyst

Current

Peroptyx

Apr 2023 - Present (2 years 5 months)

Provide data annotation services and analyze online data to improve model inputs and labeling consistency for machine learning projects.

Data Annotation Data Analysis Labeling Tools Python Documentation Research

Current

Data Annotation Specialist

Current

Welocalize

Jan 2023 - Present (2 years 8 months)

Analyze search result performance and rate relevance and quality to improve algorithm accuracy and user satisfaction; conduct QA and report trends to optimize search functionality.

Data Annotation Search Relevance Quality Assurance SQL Python NLP Data Analysis

Current

Chief Executive Officer

Current

Rater X

Jul 2020 - Present (5 years 2 months)

Founded and lead a data annotation and labeling services company focused on African languages, overseeing operations, strategy, and delivery of culturally accurate datasets for AI innovators.

Data Labeling Team Management Quality Control Operations

Quality Analyst

RWS

Jan 2023 - Feb 2025 (2 years 1 month)

Test and evaluate search engine responses for client projects, using research expertise to enhance AI training data and improve online search experiences.

Search & Evaluation Quality Assurance Research Data Annotation Reporting NLP

Data Specialist

Outlier

Jan 2023 - Jan 2025 (2 years)

Compose and revise prompts and responses, research and fact-check outputs, and assess factuality and relevance of AI-generated text to improve model performance.

Prompt Engineering Content Evaluation Fact Checking NLP Data Annotation Research

Senior Data Quality Specialist

Cohere

Jan 2024 - Dec 2024 (11 months)

Led data quality efforts for AI models, defining evaluation criteria and improving dataset fidelity to enhance language model outputs over a one-year engagement.

Data Quality QA Processes Python Metrics

Data Annotator

Appen

Dec 2021 - Dec 2024 (3 years)

Performed text and image annotation tasks to create high-quality datasets for machine learning, ensuring labeling accuracy and consistency across projects.

Data Annotation Image Labeling Annotating QA NLP Data Entry