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Chidinma O.

Chidinma O.

AI Trainer / Data Annotation Specialist

Nigeria flagLagos, Nigeria

Key Skills

Software

AppenAppen
ClickworkerClickworker
Micro1
MercorMercor
Scale AIScale AI
TelusTelus

Top Subject Matter

AI prompt engineering
AI response evaluation
and training data annotation

Top Data Types

ImageImage
AudioAudio
VideoVideo

Top Task Types

Prompt + Response Writing (SFT)Prompt + Response Writing (SFT)
Question AnsweringQuestion Answering
Bounding BoxBounding Box
SegmentationSegmentation
Object DetectionObject Detection
Text GenerationText Generation

Freelancer Overview

AI Trainer / Data Annotation Specialist. Brings 5+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Internal, Proprietary Tooling, and Python (Jupyter Notebooks). Education includes Bachelor of Arts, University of Lagos (2019) and Advanced Diploma in Software Engineering, Aptech (2023). AI-training focus includes data types such as Text and labeling workflows including Prompt + Response Writing (SFT), Evaluation, and Rating.

Labeling Experience

AI Trainer / Data Annotation Specialist

TextTextPrompt + Response Writing (SFT)Prompt + Response Writing (SFT)

Served as an AI trainer and data annotation specialist by writing, editing, and refining training prompts and AI responses across multiple domains. Cleaned and structured raw data for modeling, then evaluated AI outputs for accuracy, tone, safety, and relevance. Provided ranked model responses and structured feedback to support iterative improvements and model quality.

2023

Customer Support Specialist

TextTextQuestion AnsweringQuestion Answering

Provided customer support using chat and ticket-based systems, troubleshooting user issues related to account and platform functionality. Navigated multiple systems and maintained clear, structured troubleshooting guidance. Followed structured guidelines and documented escalations to support continuous improvement of support workflows.

2020

Data Analyst / AI Evaluation Support

TextText

Supported AI evaluation workflows by testing and evaluating model outputs and ranking responses based on quality criteria. Identified model errors, bias patterns, and logic failures, then documented findings for improvement cycles. Produced structured analysis outputs for internal teams to guide remediation steps and further dataset refinement.

2020

Education

A

Alx

Data Analysis, Data Analysis

Data Analysis
2025 - 2025
A

Aptech

Advanced Diploma in Software Engineering, Software Engineering

Advanced Diploma in Software Engineering
2020 - 2023

Work History

N

N/A

Customer Support Specialist

Lagos
2023 - 2024
N

N/A

Data Analyst (Evaluation Support)

Lagos
2020 - 2023