Dennis O.

Key Skills

Software

Appen

Clickworker

Remotasks

Sloth

Scale AI

Toloka

OneForma

Mindrift

iMerit

Top Subject Matter

General AI/Machine Learning

Mathematics/statistics/ai Domain Expertise

Top Data Types

Text

Audio

Video

Top Task Types

Text Generation

Prompt + Response Writing (SFT)

Bounding Box

RLHF

Transcription

Evaluation/Rating

Data Collection

Segmentation

Object Detection

Freelancer Overview

Data Annotator & AI Trainer. Brings 3+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Appen and Scale AI. Education includes Master of Science, University of Nairobi (2023) and Bachelor of Science, Strathmore University (2021). AI-training focus includes data types such as Text and labeling workflows including Evaluation and Rating.

Labeling Experience

Data Annotator & AI Trainer

AppenText

As a Data Annotator and AI Trainer at Appen, I worked on annotating and labeling diverse data types including text, images, and audio. My tasks included providing structured feedback on AI model outputs and ensuring that project guidelines and quality benchmarks were consistently met. I utilized expertise in mathematics and computer science for high-quality, accurate data annotation.
f2022• Labeled data such as text, images, and audio for various machine learning projects. • Evaluated and rated AI model outputs for accuracy and relevance. • Maintained high-quality and consistent annotation standards. • Collaborated with multidisciplinary teams and followed strict project guidelines.

2024 - Present

Math Expert – AI Training & Data Annotation

Scale AIText

As a Math Expert working for Scale AI, I performed extensive annotation, validation, and structuring of datasets for AI model training. My responsibilities included assessing mathematical accuracy and logical consistency in AI-generated outputs. I worked closely with engineers and project managers to improve models through targeted feedback.
f2022• Annotated and validated mathematical content and data sets for machine learning. • Ensured the accuracy and reliability of AI-generated mathematical outputs. • Provided domain expertise to enhance model quality and outputs. • Participated in structured evaluation and feedback cycles.

2023 - 2024

Education

Work History