RESUME
Joshua Obwengi
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🔗 LinkedIn: linkedin.com/in/joshuaobwengi
Professional Summary
Data Annotation Specialist with extensive experience in machine learning, artificial intelligence,
and data labeling. Skilled in image segmentation, object detection, and dataset creation for AI
models. Adept at using industry-leading annotation tools to produce high-quality labeled data with
99% accuracy. Strong communicator and collaborator with a focus on improving AI model
performance.
Key Skills
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Data Annotation & Labeling (Bounding Box, Polygon, Semantic Segmentation, Object
Tracking)
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AI & Machine Learning Data Processing
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Image & Video Annotation
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Text & Audio Annotation
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Quality Control & Accuracy Assurance (99% accuracy track record)
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Annotation Tools: CVAT, Roboflow, LabelImg, LabelMe, VoTT, LabelBox, Label Studio,
Dataloop, Doccano, and many more including client’s internal tools.
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Export Formats: JSON, XML, Pascal VOC, CSV, COCO
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Project Management & Team Collaboration
Work Experience
Computer Vision Annotator
ResQVision | Jun 2024 – Feb 2025
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Labeled RGB image data to detect people and life rafts over the ocean using drones and planes.
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Collaborated with machine learning engineers to optimize object detection models.
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Utilized CVAT for efficient annotation, optimizing labeling speed and accuracy.
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Applied detailed labeling techniques to enhance model precision for real-time search and rescue
applications.
Data Annotation Consultant
Upwork | Nov 2020 – Present (Freelance, Remote)
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Provided high-accuracy labeled datasets for clients in healthcare, e-commerce,
autonomous vehicles, and AI research.
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Utilized multiple annotation tools to meet client-specific project requirements.
Delivered projects on time while maintaining 99% accuracy in data labeling.
Semantic Segment Annotator
Invisible Technologies Inc. | Nov 2022 – July 2023
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Annotated and labeled large-scale datasets for computer vision and AI model training.
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Developed annotation guidelines and quality control processes to improve model accuracy.
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Worked with cross-functional teams to complete projects under tight deadlines.
Data Specialist
CloudFactory | Sep 2019 – Apr 2024
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Processed large datasets for computer vision projects (object detection, image
segmentation, and facial recognition).
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Conducted quality assurance checks and provided feedback to improve annotation
efficiency and accuracy.
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Collaborated with AI teams to ensure data integrity and proper model training.
Image & Video Annotator
Remotasks | Jan 2020 – Jul 2021
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Worked on text classification, sentiment analysis, and named entity recognition for NLP
projects.
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Used VGG Image Annotator & Brat Rapid Annotation Tool to label textual data.
Ensured data consistency and performed quality checks before model training.
Data Transcriber
QA World | Feb 2020 – Oct 2020
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Transcribed and formatted audio & video recordings while ensuring high accuracy.
Used automated transcription tools to improve efficiency.
Data Entry Specialist
Ten Senses Africa | Feb 2019 – Nov 2019
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Conducted data entry for agricultural datasets and trained farmers in farm data collection.
Industry Experience
✅ Agriculture | ✅ Healthcare | ✅ Finance | ✅ Transportation & Logistics | ✅ Energy & Utilities
| ✅ Entertainment
Certifications & Training
Data Annotation for Machine Learning – Self-directed Learning
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AI & Machine Learning Fundamentals – Online Certification
