John M.

Key Skills

Software

Scale AI

Appen

Remotasks

Top Subject Matter

AI Model Training/General Computer Vision and LLMs

Automatic Speech Recognition (ASR) / Speech Data

Social Media/NLP

Top Data Types

Image

Audio

Text

Top Task Types

Segmentation

Transcription

Classification

Freelancer Overview

Senior AI Data Labeler. Core strengths include Scale AI, Appen, and Remotasks. Education includes Bachelor of Science, Moi University (2019). AI-training focus includes data types such as Image, Audio, and Text and labeling workflows including Segmentation, Transcription, and Classification.

Labeling Experience

Senior AI Data Labeler

Scale AIImageSegmentation

Completed high-volume image classification and segmentation tasks for large-scale AI projects. Delivered consistently high accuracy in bounding box and polygon annotations across multiple workflows. Contributed to the development and refinement of labeling rubrics through detailed edge case documentation. • Completed over 50,000 annotation tasks with >98% quality scores. • Performed RLHF-based LLM response preference ranking for major clients. • Evaluated model performance in helpfulness, safety, and accuracy dimensions. • Improved team labeling processes by sharing edge case findings.

2022 - Present

Data Annotation Specialist

AppenTextClassification

Labeled and analyzed social media posts for sentiment and content moderation. Maintained high inter-annotator agreement on NER and text classification tasks throughout project cycles. Supported the deployment of safety and sentiment pipelines for client-facing applications. • Completed annotation of over 10,000 social media posts. • Performed sentiment analysis and toxicity detection labeling. • Sustained 97% agreement across concurrent text projects. • Provided annotations for content moderation workflows.

2021 - 2023

Data Annotation Specialist

AppenAudioTranscription

Delivered transcription and speech-to-text annotation for automatic speech recognition (ASR) systems. Processed audio datasets in both English and Swahili for multilingual AI training. Exercised high attention to detail to maintain benchmark-level transcription quality. • Completed audio transcription tasks for ASR model enhancement. • Managed speech-to-text annotation across multiple projects. • Reviewed and verified peer transcription for consistency. • Supported model fine-tuning with diverse audio samples.

2021 - 2023

Freelance AI Trainer

RemotasksImageClassification

Worked on a variety of micro-task projects including image labeling and search relevance evaluation. Generated and validated question-answer pairs for LLM dataset creation. Conducted adversarial prompt crafting and safety assessments as part of red-teaming exercises. • Provided high-accuracy image labels for training data workflows. • Rated search and query results for relevance and quality. • Generated QA pairs for LLM finetuning datasets. • Conducted safety and response evaluations for LLM outputs.

2020 - 2022

Education

Work History