David Akintunde

Key Skills

Software

Appen

Scale AI

Toloka

Top Subject Matter

Nlp Domain Expertise

Speech Recognition

Linguistic Quality

Top Data Types

Text

Image

Document

Top Task Types

Entity Ner Classification

Classification

Freelancer Overview

AI Language Trainer & Annotator (Freelance). Brings 3+ years of professional experience across legal operations, contract review, compliance, and structured analysis. Core strengths include Appen, Scale AI, and Toloka. Education includes Bachelor of Science, University of Ibadan (2015). AI-training focus includes data types such as Text and labeling workflows including Entity (NER) Classification and Classification.

Labeling Experience

Data Annotation Specialist (Remote Contract)

Scale AIImageBounding Box

As a Data Annotation Specialist at Scale AI, I focused on large-scale low-resource African language dataset projects, specializing in Yoruba text classification and entity extraction. I reviewed and corrected machine-translated Hausa content to ensure semantic and cultural accuracy. Additionally, I collaborated with the RLHF team on model evaluation and safety testing of generative AI outputs. • Conducted Yoruba text classification and entity extraction pipelines. • Reviewed Hausa translations and provided quality assurance. • Evaluated generative AI outputs via RLHF and provided written rationales. • Identified and documented safety issues and model biases.

As a Data Annotation Specialist at Scale AI, I focused on large-scale low-resource African language dataset projects, specializing in Yoruba text classification and entity extraction. I reviewed and corrected machine-translated Hausa content to ensure semantic and cultural accuracy. Additionally, I collaborated with the RLHF team on model evaluation and safety testing of generative AI outputs. • Conducted Yoruba text classification and entity extraction pipelines. • Reviewed Hausa translations and provided quality assurance. • Evaluated generative AI outputs via RLHF and provided written rationales. • Identified and documented safety issues and model biases.

2021 - Present

AI Language Trainer & Annotator (Freelance)

AppenTextEntity Ner Classification

As an AI Language Trainer & Annotator at Appen, I delivered English and Yoruba text annotation, translation, and transcription for NLP model training used by global clients. I was responsible for annotating named entities and sentiment in English news corpora and completing audio transcription tasks in diverse Hausa dialects. My contributions helped create large-scale Yoruba NER datasets and train ASR models for major technology platforms. • Performed text and audio annotation for NER, sentiment, and transcription in English, Yoruba, and Hausa. • Delivered training and evaluation data to Fortune 500 AI/ML teams. • Contributed to one of the first large-scale Yoruba NER datasets. • Achieved Tier 2 Qualified Contributor status on Appen's platform.

As an AI Language Trainer & Annotator at Appen, I delivered English and Yoruba text annotation, translation, and transcription for NLP model training used by global clients. I was responsible for annotating named entities and sentiment in English news corpora and completing audio transcription tasks in diverse Hausa dialects. My contributions helped create large-scale Yoruba NER datasets and train ASR models for major technology platforms. • Performed text and audio annotation for NER, sentiment, and transcription in English, Yoruba, and Hausa. • Delivered training and evaluation data to Fortune 500 AI/ML teams. • Contributed to one of the first large-scale Yoruba NER datasets. • Achieved Tier 2 Qualified Contributor status on Appen's platform.

2019 - Present

AI Tasker & Language Evaluator (Remote)

TolokaTextClassification

In the role of AI Tasker & Language Evaluator at Toloka, I completed thousands of relevance, image classification, and translation evaluation tasks. My work involved linguistic validation for Hausa-language search queries and quality control on annotation batches. I leveraged my statistical background to identify systematic errors and improve data quality. • Performed text and image relevance assessments and evaluations. • Validated Hausa-language search query relevance for Nigerian users. • Achieved a quality rating of 98.2% in task completion. • Escalated and documented data quality issues in annotation batches.

In the role of AI Tasker & Language Evaluator at Toloka, I completed thousands of relevance, image classification, and translation evaluation tasks. My work involved linguistic validation for Hausa-language search queries and quality control on annotation batches. I leveraged my statistical background to identify systematic errors and improve data quality. • Performed text and image relevance assessments and evaluations. • Validated Hausa-language search query relevance for Nigerian users. • Achieved a quality rating of 98.2% in task completion. • Escalated and documented data quality issues in annotation batches.

2020 - 2021

Education

Work History