Lewis Muchui

Key Skills

Software

Appen

Data Annotation Tech

Labelbox

Mercor

OneForma

Remotasks

Scale AI

Snorkel AI

Top Subject Matter

No subject matter listed

Top Data Types

Audio

Computer Code Programming

Image

Text

Video

Top Label Types

Bounding Box

Classification

Computer Programming Coding

Data Collection

Evaluation Rating

Prompt Response Writing SFT

Freelancer Overview

I am a detail-oriented data annotation specialist with over four years of experience managing archival records, labeling data, and supporting AI training projects. My background includes designing and implementing scalable annotation workflows for machine learning, with hands-on expertise in image and text labeling techniques such as bounding boxes, polygons, and keypoints. I have a strong track record in transcription, quality assurance, and providing structured feedback to improve NLP and workplace AI models. My work spans academic, historical, and STEM domains, and I am skilled at collaborating with cross-functional teams to ensure high-quality, accurate datasets that drive AI innovation.

Labeling Experience

Educational Technology & Curriculum Development

LabelboxTextClassification

Through Academic Projects, I integrated AI training concepts using labeled text and instructional material development. I researched and annotated datasets for classroom simulations and conversational AI platforms. These initiatives enhanced student engagement and improved AI-driven learning environments. • Developed curriculum materials involving AI and data annotation concepts • Annotated and tested datasets for conversational AI platforms • Researched methods to incorporate data-driven AI into education • Contributed to public academic engagement related to AI in academia

Through Academic Projects, I integrated AI training concepts using labeled text and instructional material development. I researched and annotated datasets for classroom simulations and conversational AI platforms. These initiatives enhanced student engagement and improved AI-driven learning environments. • Developed curriculum materials involving AI and data annotation concepts • Annotated and tested datasets for conversational AI platforms • Researched methods to incorporate data-driven AI into education • Contributed to public academic engagement related to AI in academia

2023

Data Annotation Specialist

LabelboxImageBounding Box

As a Data Annotation Specialist, I delivered high-quality bounding box, polygon, and semantic segmentation annotations for computer vision projects. I conducted thorough QA reviews and optimized scaled annotation workflows for large datasets. Collaborating with AI teams, I ensured dataset integrity and reliable delivery through excellent communication. • Processed images using bounding box, polygon, and segmentation techniques • Implemented quality assurance and error correction protocols • Designed and optimized scaled workflows for annotation efficiency • Coordinated progress updates and feedback via digital collaboration tools

As a Data Annotation Specialist, I delivered high-quality bounding box, polygon, and semantic segmentation annotations for computer vision projects. I conducted thorough QA reviews and optimized scaled annotation workflows for large datasets. Collaborating with AI teams, I ensured dataset integrity and reliable delivery through excellent communication. • Processed images using bounding box, polygon, and segmentation techniques • Implemented quality assurance and error correction protocols • Designed and optimized scaled workflows for annotation efficiency • Coordinated progress updates and feedback via digital collaboration tools

2022

Cding

Scale AIComputer Code ProgrammingComputer Programming Coding

Have performed many tasks and many code outputs and programmed a lot of data in the company.

Have performed many tasks and many code outputs and programmed a lot of data in the company.

2021

Transcription & Labeling Consultant

AppenAudioClassification

As a Transcription & Labeling Consultant, I provided timestamped transcription and labeled multilingual audio datasets for speech and NLP model training. I ensured full compliance with annotation standards and ethical guidelines. My work facilitated downstream sentiment analysis and text classification across project requirements. • Transcribed and labeled audio/video data for AI model development • Applied classification and sentiment annotation on structured datasets • Verified annotation accuracy with standard operating procedures • Supported multilingual projects to enhance speech recognition systems

As a Transcription & Labeling Consultant, I provided timestamped transcription and labeled multilingual audio datasets for speech and NLP model training. I ensured full compliance with annotation standards and ethical guidelines. My work facilitated downstream sentiment analysis and text classification across project requirements. • Transcribed and labeled audio/video data for AI model development • Applied classification and sentiment annotation on structured datasets • Verified annotation accuracy with standard operating procedures • Supported multilingual projects to enhance speech recognition systems

2021

Transcription

OneformaComputer Code ProgrammingPrompt Response Writing SFTTranscription

I performed transcription tasks and work in alignerr platforms.

I performed transcription tasks and work in alignerr platforms.

2023 - 2025

Education

Work History