Joseph Ndirangu

Key Skills

Software

CloudFactory

Top Subject Matter

Geospatial/Machine Learning

Legal Services & Contract Review

Regulatory Compliance & Risk Analysis

Top Data Types

Image

Text

Document

Top Task Types

Classification

Freelancer Overview

Served as an AI Model Trainer and Quality Assurance specialist on a long-term contract with Meridial AI, supporting large-scale model training initiatives in collaboration with NVIDIA. Leveraged a Bachelor’s degree and over a year of hands-on experience to evaluate and refine AI outputs across three specialized domains: creative writing, reasoning & logic, and multimodal tasks (image/video). Delivered structured, high-quality feedback that directly shaped model behavior, alignment, and output consistency across complex, multi-format training datasets. Played a key role beyond standard training duties by handling escalations and QA oversight, reviewing flagged edge cases, enforcing quality benchmarks, and ensuring outputs met NVIDIA’s enterprise-grade standards. Applied strong analytical and critical thinking skills to assess nuanced creative and logical outputs, while also evaluating visual and multimedia content for accuracy and coherence. This dual capacity — as both a skilled trainer and a quality checkpoint — demonstrates a proven ability to operate at a senior level, maintain high performance under evolving project demands, and contribute to the broader reliability of cutting-edge AI systems.

Labeling Experience

Data Analyst/Data Labeler

CloudfactoryImageClassification

At CloudFactory Kenya Limited, I performed data labeling and annotation to support machine learning projects. My work focused on adding meaningful labels to raw data such as roof geometry and streets to provide essential context for AI training. This required attention to detail and accuracy to ensure high-quality labeled datasets for downstream model development. • Labeled and annotated aerial images for roof geometry using specified guidelines. • Tagged and classified street imagery for mapping and geospatial tasks. • Employed Google Sheets for tracking and managing label metadata. • Collaborated with a team to meet project deadlines and quality metrics.

At CloudFactory Kenya Limited, I performed data labeling and annotation to support machine learning projects. My work focused on adding meaningful labels to raw data such as roof geometry and streets to provide essential context for AI training. This required attention to detail and accuracy to ensure high-quality labeled datasets for downstream model development. • Labeled and annotated aerial images for roof geometry using specified guidelines. • Tagged and classified street imagery for mapping and geospatial tasks. • Employed Google Sheets for tracking and managing label metadata. • Collaborated with a team to meet project deadlines and quality metrics.

2021 - 2021

Education

Work History