Stephen Mutheu

Key Skills

Software

Other

Telus

Appen

Top Subject Matter

AI Training & Quality Evaluation

Linguistics Domain Expertise

Text Data

Top Data Types

Text

Image

Document

Top Task Types

Classification

Text Generation

Prompt Response Writing SFT

Computer Programming Coding

Text Summarization

Question Answering

Freelancer Overview

AI Data & Linguistic Tasks. Brings 3+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Other, Telus, and Appen. Education includes Bachelor of Science, University of the People (2024) and Diploma, Metab Computer College (2022). AI-training focus includes data types such as Text and labeling workflows including Classification.

Labeling Experience

Freelance AI Data Specialist

TelusTextClassification

I completed diverse AI training and data-quality tasks across global platforms, working with text, image, and audio data. My key responsibilities included content labeling, annotation, query analysis, and data categorization to support model training and evaluation. I also ensured high accuracy, cultural relevance, and compliance with project guidelines. • Labeled and annotated text, images, and audio samples per project protocols. • Performed translation, transcription, and audio review assignments. • Conducted quality assurance and content evaluation tasks for clients. • Adapted workflow to various tools and requirements for multiple international projects.

I completed diverse AI training and data-quality tasks across global platforms, working with text, image, and audio data. My key responsibilities included content labeling, annotation, query analysis, and data categorization to support model training and evaluation. I also ensured high accuracy, cultural relevance, and compliance with project guidelines. • Labeled and annotated text, images, and audio samples per project protocols. • Performed translation, transcription, and audio review assignments. • Conducted quality assurance and content evaluation tasks for clients. • Adapted workflow to various tools and requirements for multiple international projects.

2025 - Present

AI Training & Data Annotation Contributor

AppenTextClassification

I participated in a broad range of AI training projects, focusing on annotation and evaluation of text, image, and audio data to improve machine learning model performance. Tasks included audio transcription, utterance collection, and quality review, as well as content relevance and search evaluation. I consistently met project guidelines and performance expectations across multiple platforms. • Annotated and labeled multilingual data for text, image, and audio projects. • Completed transcription and audio collection for machine learning applications. • Contributed to search evaluation and social media recommendation refinement. • Adapted rapidly to project-specific tools and high productivity standards.

I participated in a broad range of AI training projects, focusing on annotation and evaluation of text, image, and audio data to improve machine learning model performance. Tasks included audio transcription, utterance collection, and quality review, as well as content relevance and search evaluation. I consistently met project guidelines and performance expectations across multiple platforms. • Annotated and labeled multilingual data for text, image, and audio projects. • Completed transcription and audio collection for machine learning applications. • Contributed to search evaluation and social media recommendation refinement. • Adapted rapidly to project-specific tools and high productivity standards.

2024 - Present

AI Data & Linguistic Tasks

OtherTextClassification

I contributed to multiple AI training projects focused on linguistic tasks, text annotation, and content labeling. My role involved ensuring data quality through translation, rewriting, and quality review, improving the performance of language models and search relevance. I followed strict guidelines and conducted evaluation and QA checks to maintain consistent, high-quality outputs. • Performed text annotation and content categorization using proprietary RWS tools. • Conducted translation and rewriting for AI model training data. • Executed quality assurance and compliance checks on labeled data. • Collaborated with international teams to meet productivity and accuracy targets.

I contributed to multiple AI training projects focused on linguistic tasks, text annotation, and content labeling. My role involved ensuring data quality through translation, rewriting, and quality review, improving the performance of language models and search relevance. I followed strict guidelines and conducted evaluation and QA checks to maintain consistent, high-quality outputs. • Performed text annotation and content categorization using proprietary RWS tools. • Conducted translation and rewriting for AI model training data. • Executed quality assurance and compliance checks on labeled data. • Collaborated with international teams to meet productivity and accuracy targets.

2024 - Present

Education

Work History