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J

John O.

Senior Data Annotator | Doxa Protech

Nigeria flagAbuja, Nigeria

Key Skills

Software

Data Annotation TechData Annotation Tech
LabelImgLabelImg
DatatroniqDatatroniq

Top Subject Matter

Machine Learning image dataset annotation for ML models
Ground truth dataset generation and quality control for machine learning labeling workflows
Legal Services & Contract Review

Top Data Types

ImageImage
TextText
DocumentDocument

Top Task Types

Bounding BoxBounding Box
Text GenerationText Generation
Text SummarizationText Summarization
Fine-tuningFine-tuning

Freelancer Overview

Senior Data Annotator | Doxa Protech. Brings 7+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include N and A. Education includes Bachelor of Technology, Federal University of Technology-Akure (FUTA) (2020). AI-training focus includes data types such as Image and labeling workflows including Bounding Box, Evaluation, and Rating.

Labeling Experience

Senior Data Annotator | Doxa Protech

ImageImageBounding BoxBounding Box

Provided image annotation for ML training, labeling 10,000+ images with 98%+ accuracy using bounding boxes and polygons. Partnered with ML engineers to refine labeling guidelines and improve consistency across the team. Performed rigorous QA to ensure annotations matched technical specifications and remained compliant with dataset requirements. • Labeled images with bounding boxes and polygon shapes • Maintained 98%+ labeling accuracy on large dataset volumes • Collaborated to reduce guideline disputes by 30% • Conducted QA for specification compliance and dataset quality

2022 - 2025

Project Manager & Embedded Systems Designer | 8Qube Technologies

ImageImage

Supported creation of ground truth datasets by translating machine learning requirements into task instructions for global labeling teams. Designed and supervised multi-level review workflows to validate and improve annotation reliability. Ensured labeled outputs aligned with the intended ML objectives and quality standards. • Converted ML requirements into labeling task breakdowns • Managed remote labeling teams and workflow design • Implemented multi-level reviews for ground truth validation • Ensured alignment between annotations and ML targets

2020 - 2022

Education

F

Federal University of Technology-Akure (FUTA)

Bachelor of Technology, Physics Electronics

Bachelor of Technology
2015 - 2020

Work History

M

Mogrex Technology

Mobile Application Developer

Abuja
2026 - Present
N

National Youth Service Corps (NYSC)

Graduate Intern (Administrative Support)

Bunu/Kabba
2024 - 2025