Chinonso E.

Key Skills

Software

Mindrift

Appen

Other

Top Subject Matter

Search engine results

product categorization

and AI response safety/evaluation

Top Data Types

Text

Audio

Top Task Types

Transcription

Freelancer Overview

Data annotator/QA expert at Mindrift. Brings 7+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Mindrift, Appen, and Other. Education includes Bachelor of Arts, Covenant University (2024). AI-training focus includes data types such as Text and Audio and labeling workflows including Evaluation, Rating, and Transcription.

Labeling Experience

Freelance Writer - Upwork

AppenAudioTranscription

Freelance writing for clients through an online marketplace, producing blog posts, reviews, and articles. Transcribes a variety of audio sources for different content needs, including interviews and academic materials. The role requires strong writing, research, and transcription accuracy while meeting client timelines and quality expectations. • Write and edit client blogs, reviews, and articles • Transcribe speeches from conversations, interviews, and academic audio • Maintain consistent formatting and accuracy across deliverables • Manage deadlines and quality standards for a high client rating

2020 - Present

Freelance transcription work via Upwork (data labeling oriented)

OtherAudioTranscription

Provided transcription services for client requests covering a range of spoken content. Produced written transcripts by converting audio from interviews, conversations, speeches, and academic materials into text. Delivered labeled, cleaned, and review-ready transcription outputs for use in downstream tasks. • Transcribed speeches and spoken conversations for clients • Transcribed political interviews and academic spoken materials • Produced text outputs from audio sources for client usage • Supported broader language-data needs through accurate transcription

2020 - Present

Data annotator/QA expert at Mindrift

MindriftText

Served as a data annotator and QA expert by evaluating and rating AI and search-related outputs. Assessed the quality and correctness of content by comparing results, matching them to expected categories, and verifying AI response attributes. Helped improve recommendation, search, and safety quality through structured evaluation. • Performed pair-wise evaluation of search engine results to select the better option • Reviewed shopping products and checked alignment to website categories • Compared AI responses to prompts for safety, helpfulness, and factuality • Conducted QA-style verification to support algorithm and recommendation improvements

2023 - 2025

Audio Evaluator at Appen

AppenAudio

Worked as an audio evaluator by assessing speech recordings and their derived speech-to-text outputs. Focused on improving clarity, accuracy, and overall quality for speech and language AI systems. Verified consistency between audio and transcriptions and provided quality feedback relevant to voice recognition models. • Evaluated audio recordings for clarity, accuracy, and overall quality • Compared transcriptions with original audio to check correctness and consistency • Reviewed pronunciation, accent, and speaker clarity • Supported improvements to speech-to-text, voice recognition, and conversational AI models

2022 - 2024

Education

Work History