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Sapphire D.

Sapphire D.

AI Data Labeling and Annotation Specialist

Nigeria flagLagos, Nigeria

Key Skills

Software

LabelboxLabelbox
Scale AIScale AI
RemotasksRemotasks
Label StudioLabel Studio

Top Subject Matter

E-commerce
Customer Experience Autonomous Vehicles
Customer Support Natural Language Processing

Top Data Types

ImageImage
TextText
VideoVideo

Top Task Types

Entity (NER) ClassificationEntity (NER) Classification
Object DetectionObject Detection
Text GenerationText Generation
Question AnsweringQuestion Answering
TranscriptionTranscription
Bounding BoxBounding Box
Evaluation/RatingEvaluation/Rating
Prompt + Response Writing (SFT)Prompt + Response Writing (SFT)

Freelancer Overview

I have been able to work with both structured and unstructured data, taking care of their consistency and correctness. I am acquainted with data classification, validation, and annotation techniques essential for constructing trustworthy datasets for AI training. I am adept at being meticulous and paying close attention to detail, which helps me clean data and adhere to exact labeling guidelines effectively.

Labeling Experience

Speech Audio Transcription and Intent Labeling

AudioAudioTranscriptionTranscription

Labeling transcribing and marking tones for customer service calls, which included tagging of speakers intents and tones, provided data used to train and evaluate speech recognition algorithms and conversational artificial intelligence programs

2025 - 2025

Named Entity Recognition Dataset Labeling for NLP

TextTextEntity (NER) ClassificationEntity (NER) Classification

Tagged structured and unstructured text files with named entities such as names, places, organizations, dates, and money amounts to facilitate creation of NLP training data sets useful for contract review and analysis of financial documents

2024 - 2025

Street Scene Image Annotation for Object Detection

ImageImageObject DetectionObject Detection

Bounding boxes annotation and polygon segmentation for objects such as vehicles, pedestrians, traffic signs, and road elements in street scene imagery were conducted with great emphasis on accuracy for machine learning models.

2024 - 2024

Customer Feedback Sentiment & Intent Labeling

TextTextEntity (NER) ClassificationEntity (NER) Classification

Classified large amounts of feedback from customers and social media texts based on sentiments (negative, positive, neutral). Conducted the classification using annotation guidelines in order to ensure accuracy and consistency. The purpose was to build a sentiment analysis model.

2024 - 2024

Education

L

Lagos State University

Bachelor's Degree, Mechanical Engineering

Bachelor's Degree
2022 - 2026

Work History

X

Xolarie

AI Architect

Lagos
2023 - Present