Emmanuel E.

Key Skills

Software

Appen

Other

Lionbridge

Top Subject Matter

Conversational AI (English and Yoruba)

Multilingual NLP datasets (healthcare, legal, e-commerce)

Multilingual chatbot training data (intent/entity)

Top Data Types

Text

Image

Document

Top Task Types

Emotion Recognition

Freelancer Overview

Senior Data Annotation Specialist (Lead annotator) — Appen (Remote). Brings 6+ years of professional experience across legal operations, contract review, compliance, and structured analysis. Core strengths include Appen, Other, and Lionbridge. Education includes Bachelor of Science, University of Uyo (2022). AI-training focus includes data types such as Text and labeling workflows including Evaluation, Rating, and Translation.

Labeling Experience

Senior Data Annotation Specialist (Lead annotator) — Appen (Remote)

AppenText

Served as lead annotator for conversational AI projects, reviewing and rating model outputs for English and Yoruba content. Maintained inter-annotator agreement (IAA) above 94% through consistent evaluation practices. Refined annotation guidance for edge cases to improve labeling consistency and team efficiency. • Reviewed and rated model outputs for conversational AI • Ensured IAA scores stayed above 94% • Delivered 85,000+ labeled data points • Mentored 8 junior annotators and ran weekly calibration sessions

2022 - 2025

Data Annotator & QA Reviewer — Translated.com (Contract)

OtherText

Annotated NLP datasets including text, audio transcripts, and image captions across healthcare, legal, and e-commerce domains. Performed translation and post-editing between English, Yoruba, and Igbo to support multilingual dataset quality. Achieved a 98% QA pass rate across all batches. • Annotated text, audio transcripts, and image captions for NLP • Translated and post-edited between English, Yoruba, and Igbo • Applied QA processes to maintain dataset accuracy • Delivered 98% QA pass rate across batches

2020 - 2022

Linguistic Reviewer & Translator — Lionbridge AI

LionbridgeText

Reviewed machine-translated texts for fluency and cultural accuracy to improve multilingual training data. Contributed to multilingual chatbot training data by providing intent and entity labels. Conducted internal accuracy audits to identify recurring MT failure patterns in low-resource language pairs. • Performed linguistic review of machine-translated outputs • Supported intent and entity labeling for chatbot datasets • Assessed cultural and fluency quality • Audited low-resource MT failure patterns

2018 - 2020

Research Assistant — NLP (Annotation & schema development) — University of Uyo

TextEmotion Recognition

Annotated corpora for a sentiment analysis project using African social media data. Developed annotation schemas to standardize label definitions and improve reliability. Achieved Cohen's Kappa of 0.87 to support high-quality dataset labeling. • Labeled sentiment-related annotations on social media corpora • Built and refined annotation schemas • Supported consistent labeling across samples • Produced reliability results (Cohen's Kappa 0.87)

2017 - 2018

Education

Work History