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Precious E.
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Precious E.

AI Data Annotator | Image Labeling, Audio & Speech | CVAT | LabelBox

I provide annotation services with precision and data consistency. Delivering labeled datasets at 98%+ accuracy. In building an AI system, the quality of your training data is everything and that is where I come in. I am an AI Data Annotator specialist in image, Video, audio and speech labeling with over 6 years of experience helping machine learning teams and AI companies get their training data right. I have worked across computer vision, speech recognition, generative AI, and multimodal systems, and I understand that bad annotation does not just slow down a project, it breaks the model. What I actually do goes beyond clicking and labeling. I help teams design labeling workflows, write annotation guidelines that make sense, set up QA systems, and coordinate annotation teams on large-scale projects. I have delivered everything from small pilot datasets to massive production-ready annotation operations and I know how to keep quality consistent. My specialty: 🔸 Audio & Speech Transcription & ASR labeling Speaker diarization Sound event tagging Accent and language diversity annotation 🔸 Computer Vision & Image Bounding boxes, polygons, segmentation Keypoints and object tracking Semantic & instance segmentation 🔸 Autonomous Vehicles Lane marking, drivable areas Traffic signs, LiDAR & video annotation 🔸 LLM Alignment RLHF & RLAIF Prompt and response evaluation 🔸 Healthcare AI Medical image labeling High-precision QA workflows 🔸 E-commerce Product categorization, attribute tagging Catalog normalization Tools I have worked with: Jira CVAT Roboflow LabelBox Label Studio VOTT V7 (Darwin) SuperAnnotate Supervisely Annotation Pro Google Sheet Microsoft 365 DataLoop and more If you need someone who understands both the technical and operational side of AI data labeling Let's talk. I am ready to add value from day one.

🇳🇬Lagos, Nigeria$10/hr100% JSS4.86 (27)Since Jul 2020

Earnings and projects

MRR
$387

Last 6 months ÷ 6

World#88,192 / 412k
🇳🇬Country#2,678 / 13.8k
Revenue, last 30 days
—

Read daily since Oct 20, under 30 days

Total earnings
$24k

Billed in all: $26k

World#125,784 / 412k
🇳🇬Country#1,842 / 13.8k
Per project
$624

$258 in the last 6 months

World#162,675 / 412k
🇳🇬Country#3,385 / 13.8k
Projects, last 6 months
9

Across 11 contracts

64% fixed36% hourly
World#21,105 / 412k
🇳🇬Country#1,418 / 13.8k
Projects in all
39

Across 44 contracts

57% fixed43% hourly
World#77,390 / 412k
🇳🇬Country#1,821 / 13.8k

Earnings, last 30 days

$25.7kNothing earned since Oct 20Billed in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$25.0k$25.5k$26.0k$26.5kOct 20Oct 29Nov 7

Tracked from Oct 20, 2026.

Skill rankings: Top 12% in Audio Recording

Ranked by MRR among everyone on Upwork with the skill.

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  6. #38Roboflow98 freelancers · 🇳🇬 #2Top 39%
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  8. #64CVAT204 freelancers · 🇳🇬 #3Top 31%