Open to opportunities

David l Nzioka

@davidlnzioka

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AI training and data science specialist focused on ML/NLP, prompt engineering, and high-quality labeled data.

Kenya

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What I'm looking for

I seek roles focused on AI model training, NLP or ML engineering with clear impact, collaborative teams, remote flexibility, and opportunities to refine datasets and improve model accuracy.

I am a Computer Science student at the University of Nairobi specializing in AI model training, data annotation, and NLP workflows, with hands-on experience in remote and local industry settings.

I have labeled and verified thousands of text samples, performed fact-checking and hallucination detection, and improved chatbot performance through prompt testing and correction while contributing to RLHF pipelines.

My background includes roles at Outlier AI, Remotasks, CloudFactory, Safaricom PLC, and KRA, and I bring strong Python, data processing, and QA skills along with attention to detail and the ability to work independently.

Experience

Work history, roles, and key accomplishments

Current

AI Data Trainer

Current

Outlier AI

Jan 2024 - Present (2 years)

Trained and evaluated large language models by labeling and verifying thousands of text samples, improving chatbot performance through prompt testing and fact-checking to reduce hallucinations.

Data Annotation NLP Prompt Engineering Quality Assurance Python Fact Checking Model Evaluation

Current

AI Annotation Specialist

Current

Remotasks

Jan 2024 - Present (2 years)

Labeled text, intent, and sentiment data and evaluated model outputs against human expectations, following strict guidelines to maintain high-quality training data for fine-tuning LLMs.

Data Labeling Sentiment Analysis & QA Fine Tuned LLMs Python Data Validation

Junior Machine Learning Data Analyst

CloudFactory

Jan 2023 - Dec 2024 (1 year 11 months)

Processed and labeled structured and unstructured datasets, cleaned and validated training data with Python and Excel, and supported QA to flag errors and improve model accuracy for AI clients.

Data Cleaning Data Labeling Python Excel & QA Data Validation

Software Development Intern

Safaricom PLC

Jan 2023 - Dec 2023 (11 months)

Assisted in building and testing internal web applications, wrote Python scripts to automate data processing, and integrated APIs and databases to manage customer data within Agile teams.

Python APIs Web Development Databases Automation Testing Agile Software Deployment

IT & Systems Support Assistant

Kenya Revenue Authority

Jan 2022 - Dec 2023 (1 year 11 months)

Maintained databases and computer systems, assisted in deploying software updates, and supported digital tax processing systems by troubleshooting issues alongside IT engineers.

Systems support Troubleshooting Software Deployment IT Support Linux Documentation

Education

Degrees, certifications, and relevant coursework

University of Nairobi

Bachelor of Science, Computer Science

Pursuing a Bachelor of Science in Computer Science with coursework in AI, machine learning, data structures, databases, algorithms, statistics, and software engineering; expected graduation in 2027.