Joshua A.

Key Skills

Software

Appen

Remotasks

Top Subject Matter

LLM and computer vision training datasets for global AI clients

NLP training datasets and RLHF alignment

autonomous driving/robotics datasets

Top Data Types

Image

Text

Audio

Top Task Types

Classification

Transcription

Freelancer Overview

Senior Data Labeling Specialist, ScaleAI (Remote, Nigeria). Brings 7+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Internal, Proprietary Tooling, and Appen. Education includes Bachelor of Science, University of Lagos (UNILAG) (2025). AI-training focus includes data types such as Image, Text, and Audio and labeling workflows including Classification, Entity (NER), and Transcription.

Labeling Experience

Senior Data Labeling Specialist, ScaleAI (Remote, Nigeria)

ImageClassification

Senior Data Labeling Specialist annotations for multi-label classification tasks across LLM and computer vision training pipelines. Responsibilities included tagging using internal guidelines and maintaining high labeling consistency across many concurrent projects. Quality was tracked with an accuracy target above 98% for global AI clients. • Annotated 200,000+ images, text samples, and audio clips monthly • Maintained 98.7% quality accuracy across 15+ concurrent projects • Developed internal guidelines and tagging taxonomies for complex multi-label classification • Led and trained a team of 8 junior annotators with QA review

2023 - Present

Data Annotation Specialist, Appen (Remote, Nigeria)

AppenText

Data Annotation Specialist performing NLP labeling for machine learning training datasets. Work included text classification, named entity recognition, and sentiment labeling, plus alignment tasks for RLHF workflows. Additional responsibilities covered autonomous driving and robotics annotation using geometric targets. • Performed text classification, NER, and sentiment labeling for NLP datasets • Completed RLHF tasks by ranking and rating AI-generated responses for alignment and safety • Labeled bounding boxes, segmentation masks, and keypoints for autonomous driving/robotics datasets • Contributed to Yoruba, Igbo, and Hausa language datasets for African language AI development

2021 - 2022

Freelance AI Data Contributor, Remotasks/Toloka (Remote)

RemotasksAudioTranscription

Freelance AI data contribution focused on microtask annotation for speech and multimodal data. Tasks included audio transcription and labeling for relevance and categorization. Contributions supported speech recognition datasets in Nigerian English and local dialects. • Completed microtask annotation for audio transcription, image tagging, and relevance rating • Transcribed audio recordings for Nigerian English and local dialects • Produced labeled outputs for speech recognition dataset development • Helped improve dataset quality through throughput and accuracy-focused contributions

2020 - 2021

Education

Work History