John S.

Key Skills

Software

Labelbox

CVAT

Other

Label Studio

Supervisely

Top Subject Matter

Computer Vision (object detection)

Computer Vision (video object tracking)

Speech Recognition / Transcription

Top Data Types

Image

Video

Audio

Text

Document

Top Task Types

Object Detection

Tracking

Transcription

Classification

Segmentation

Freelancer Overview

AI Training Specialist / Data Annotation Expert (Freelance & Remote AI Projects). Core strengths include Labelbox, CVAT, and Other. Education includes Secondary Education, Riambase Secondary School (2021) and Bachelor's Degree, Kirinyaga University (2026). AI-training focus includes data types such as Image, Video, and Audio and labeling workflows including Object Detection, Tracking, and Transcription.

Labeling Experience

AI Training Specialist / Data Annotation Expert (Freelance & Remote AI Projects)

OtherTextClassification

Annotated text datasets for natural language processing applications, supporting labeling workflows used in AI model development. Ensured annotation quality by reviewing and validating outputs against project guidelines. Prepared structured text data to support downstream training and accuracy improvements. • Labeled text data for classification tasks. • Performed QA review to validate annotation quality. • Maintained annotation accuracy under deadline constraints. • Prepared structured datasets for NLP model training.

2023 - Present

AI Training Specialist / Data Annotation Expert (Freelance & Remote AI Projects)

OtherAudioTranscription

Labeled audio datasets to support speech recognition and related transcription tasks. Performed quality assurance checks to correct inconsistencies and ensure label compliance. Contributed to dataset preparation for training models that rely on high-quality audio annotations. • Created audio labels to support speech recognition. • Reviewed and validated audio annotations for correctness. • Ensured timely delivery while meeting productivity targets. • Prepared datasets for model training and performance improvement.

2023 - Present

AI Training Specialist / Data Annotation Expert (Freelance & Remote AI Projects)

OtherVideoTracking

Annotated video data for AI and machine learning applications, including object tracking and classification-oriented labeling. Validated annotation consistency against project requirements during QA review cycles. Prepared video datasets to improve training readiness for computer vision and speech recognition pipelines. • Labeled video content for object tracking workflows. • Reviewed and validated annotations for compliance and quality. • Maintained accuracy and throughput against project deadlines. • Prepared and maintained training-ready datasets for model development.

2023 - Present

AI Training Specialist / Data Annotation Expert (Freelance & Remote AI Projects)

OtherImageObject Detection

Provided object detection annotations for computer vision datasets used in AI and machine learning applications. Labeled images and reviewed outputs to ensure compliance with project guidelines and maintain annotation accuracy. Supported training dataset preparation for model development. • Annotated objects within images for detection/classification workflows. • Validated and corrected annotations during review cycles to meet quality requirements. • Maintained throughput while meeting productivity and deadline targets. • Prepared clean, structured datasets for training computer vision models.

2023 - Present

Data Annotation Specialist (AI Data Services Projects)

OtherAudioTranscription

Labeled audio datasets for speech recognition and transcription projects to support NLP-adjacent audio modeling. Performed quality assurance checks to identify and fix annotation inconsistencies. Coordinated with project teams to enhance annotation workflow effectiveness and dataset quality. • Labeled audio data for transcription and speech recognition. • Conducted QA reviews and corrected labeling issues. • Collaborated to improve annotation workflows. • Produced reliable audio datasets for model training.

2022 - 2023

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Education

Work History