CG

CHARLES GACHANJA MUNYUA

Data Scientist | Data Annotator Specialist | AI Enthusiast

NAIROBI, KENYA

ABOUT

Curious and analytical Data Scientist & Data Annotator with a strong passion for uncovering the stories hidden within data. Skilled in data exploration, predictive modelling, natural language processing (NLP), and dashboard development, I transform raw, messy data into meaningful insights that drive smarter decisions. My experience spans from building and evaluating machine learning models to creating clear, actionable visualizations that help teams understand what the numbers truly mean. As a Data Annotator, I bring precision and consistency to AI training workflows—ensuring high-quality labelled data that powers accurate models. What excites me most is the potential of AI and machine learning to solve real-world challenges. I'm driven to build systems that learn, adapt, and assist, bridging the gap between human intuition and data-driven intelligence.

EXPERTISE

PYTHONSTRUCTURED QUERY LANGUAGE (SQL)EXCELPANDASNUMPY
MACHINE LEARNING ALGORITHMSSCIKIT-LEARNNATURAL LANGUAGE PROCESSING (NLP)BIGDATA
MATPLOTLIBSEABORNPOWER BIFLASKSTREAMLIT
LABEL STUDIOCVATVGG IMAGE ANNOTATOR (VIA)
BOUNDING BOXPOLYGONSEGMENTATIONCLASSIFICATION LABELLING
YOLO (YOU ONLY LOOK ONCE)COCO DATASET FORMATOPENCVYOLO .TXTCOCO .JSONPASCAL VOC .XML
MODEL TRAINING & EVALUATIONOBJECT DETECTIONIMAGE CLASSIFICATIONANNOTATED DATASETS MANAGEMENT

EXPERIENCE

ANNOTATION QA SPECIALIST (FREELANCE)

iMerit Technology - Remote

2025-12 - PRESENT

DATA ANNOTATION SPECIALIST - COMPUTER VISION (FREELANCE)

Jupiter AI Labs - Remote

2025-10

DATA ANNOTATOR SPECIALIST (FREELANCE)

RWS Group - Remote

2025-07

AI TRAINER | DATA ANALYST | DATA ENTRY (FREELANCE)

Up Work - Remote

2024-02

ELECTRICAL DATA ANALYST INTERN

Lipton Tea Factory - Onsite

2023-08

EDUCATION

ALX AFRICA

degree in Data Science

Present

THIKA TECHNICAL INSTITUTE

degree in Electrical and Electronic Engineering

2023-07