Denis Kioko

Key Skills

Software

Appen

Mercor

Mindrift

Top Subject Matter

No subject matter listed

Top Data Types

Document

Image

Text

Top Label Types

Bounding Box

Point Key Point

Segmentation

Freelancer Overview

I am a multilingual data labeling and annotation specialist with over five years of experience supporting AI and machine learning projects across text, image, and audio domains. My expertise includes transcription, translation, and annotation for natural language processing, speech recognition, and machine translation applications, with a strong focus on English and Swahili datasets. I am skilled in using industry-standard tools such as Appen and Lionbridge platforms, Excel, and basic Python for data handling, and have a proven track record of delivering high-quality, accurate, and consistent datasets that have improved model performance. I thrive in cross-functional, multicultural teams and am committed to ensuring data quality, reliability, and linguistic accuracy in every project I undertake.

Labeling Experience

Data Labeling Expart

MercorTextBounding BoxPoint Key Point

Performed data labeling and annotation of text, image, and audio datasets for AI/ML model training on platforms including Mecrro, Scale AI, Remotasks, and Appen. Tasks included text classification, sentiment analysis, named entity recognition (NER), image bounding/segmentation, and audio transcription. Managed large datasets with high accuracy, following detailed platform guidelines and quality standards. Ensured consistency, completeness, and adherence to data privacy and ethical AI practices.

Performed data labeling and annotation of text, image, and audio datasets for AI/ML model training on platforms including Mecrro, Scale AI, Remotasks, and Appen. Tasks included text classification, sentiment analysis, named entity recognition (NER), image bounding/segmentation, and audio transcription. Managed large datasets with high accuracy, following detailed platform guidelines and quality standards. Ensured consistency, completeness, and adherence to data privacy and ethical AI practices.

2024 - 2025

Education

Work History