For employers

Hire this AI Trainer

Sign in or create an account to invite AI Trainers to your job.

Invite to Job
J

James Ngaruiya

NLP-based Data Labeling for Customer Segmentation

Kenya flagNairobi, Kenya
$20.00/hrIntermediateClickworkerAws SagemakerAppen

Key Skills

Software

ClickworkerClickworker
AWS SageMakerAWS SageMaker
AppenAppen

Top Subject Matter

Sales and customer analytics
Customer/community feedback and insights

Top Data Types

TextText
ImageImage

Top Task Types

Entity (NER) ClassificationEntity (NER) Classification
Text GenerationText Generation

Freelancer Overview

NLP-based Data Labeling for Customer Segmentation. Brings 5+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Internal, Proprietary Tooling, and LangChain. Education includes Certificate, Worldquant University (2025) and Certificate, ALX Africa (2024). AI-training focus includes data types such as Text and labeling workflows including Entity (NER) Classification and Text Generation.

IntermediateEnglish

Labeling Experience

LLM Workflow Prompt Engineering and Data Annotation

TextText Generation
In my AI-Powered Customer Insight & Feedback System project, I designed and refined workflows involving prompt engineering and feedback classification using large language models (LLMs). The core work involved fine-tuning and validating LLM outputs to generate concise summaries from unstructured feedback data. I labeled and evaluated prompts and responses to enhance LLM performance and ensure actionable customer insights. • Conducted prompt engineering and response rating for feedback summarization tasks. • Labeled feedback categories (e.g., product quality, service issues) in community feedback data. • Employed sentiment analysis and NER for accurate text annotation. • Iteratively tested and improved model prompts via A/B validation cycles.

In my AI-Powered Customer Insight & Feedback System project, I designed and refined workflows involving prompt engineering and feedback classification using large language models (LLMs). The core work involved fine-tuning and validating LLM outputs to generate concise summaries from unstructured feedback data. I labeled and evaluated prompts and responses to enhance LLM performance and ensure actionable customer insights. • Conducted prompt engineering and response rating for feedback summarization tasks. • Labeled feedback categories (e.g., product quality, service issues) in community feedback data. • Employed sentiment analysis and NER for accurate text annotation. • Iteratively tested and improved model prompts via A/B validation cycles.

2024 - Present

NLP-based Data Labeling for Customer Segmentation

TextEntity Ner Classification
As part of the Customer Segmentation & Sales Optimization project at Bulwark Industries, I leveraged NLP to process and analyze unstructured text data from customer feedback, reviews, and support interactions. The process primarily involved classifying textual data based on sentiment, customer intent, and key entity recognition to inform business decisions. I applied advanced NLP techniques to identify and annotate customer segments for improved sales strategies. • Utilized Python NLP libraries for text pre-processing and entity extraction. • Annotated sentiments and intent in customer communications for actionable insights. • Labeled unstructured customer feedback into predefined segments using classification models. • Ensured label consistency for downstream machine learning applications.

As part of the Customer Segmentation & Sales Optimization project at Bulwark Industries, I leveraged NLP to process and analyze unstructured text data from customer feedback, reviews, and support interactions. The process primarily involved classifying textual data based on sentiment, customer intent, and key entity recognition to inform business decisions. I applied advanced NLP techniques to identify and annotate customer segments for improved sales strategies. • Utilized Python NLP libraries for text pre-processing and entity extraction. • Annotated sentiments and intent in customer communications for actionable insights. • Labeled unstructured customer feedback into predefined segments using classification models. • Ensured label consistency for downstream machine learning applications.

2023 - Present

Education

W

Worldquant University

Certificate, Applied Data Science and Deep Learning

Certificate
2024 - 2025
A

ALX Africa

Certificate, Software Engineering

Certificate
2023 - 2024

Work History

F

Freelancing

Data Science / ML Engineer Consultant

Nairobi
2023 - Present
B

Bulwark Industries

Data Scientist / Analyst

Nairobi
2023 - Present