Oscah Juma

Key Skills

Software

Other

Remotasks

Label Studio

Toloka

Top Subject Matter

Computer Vision

General & Technical Language Tasks

Text Evaluation for AI Models

Top Data Types

Image

Text

Video

Top Task Types

Object Detection

Prompt + Response Writing (SFT)

Bounding Box

Text Generation

Evaluation/Rating

Polygon

Freelancer Overview

AI Trainer – Image & Video Annotation. Brings 4+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Other, Remotasks, and Outlier. Education includes Bachelor of Science, Kirinyaga University (2022). AI-training focus includes data types such as Image and Text and labeling workflows including Object Detection, Prompt + Response Writing (SFT), and Evaluation.

Labeling Experience

AI Trainer – Image & Video Annotation

OtherImageObject Detection

In this role, I performed high-precision image and video annotation, including object detection, segmentation, classification, and temporal tracking across diverse datasets. I ensured annotation consistency and quality by strictly following labeling guidelines and conducting regular validation checks. I collaborated with AI teams to improve dataset quality for computer vision models, identified edge cases, and maintained high throughput in large-scale data labeling tasks. • Annotated images and videos with object detection, segmentation, and classification labels. • Followed detailed annotation protocols and conducted quality validation checks. • Worked with AI teams to refine data accuracy and handle ambiguous cases. • Managed large volumes of annotation while maintaining accuracy and quality.

In this role, I performed high-precision image and video annotation, including object detection, segmentation, classification, and temporal tracking across diverse datasets. I ensured annotation consistency and quality by strictly following labeling guidelines and conducting regular validation checks. I collaborated with AI teams to improve dataset quality for computer vision models, identified edge cases, and maintained high throughput in large-scale data labeling tasks. • Annotated images and videos with object detection, segmentation, and classification labels. • Followed detailed annotation protocols and conducted quality validation checks. • Worked with AI teams to refine data accuracy and handle ambiguous cases. • Managed large volumes of annotation while maintaining accuracy and quality.

2025 - Present

Freelance Generalist AI Trainer

RemotasksTextPrompt Response Writing SFT

As a freelance generalist AI trainer, I created, reviewed, and refined high-quality prompts and responses across technical and general domains to train AI systems. I evaluated and ranked AI outputs for factual accuracy, clarity, tone, and adherence to guidelines. I also conducted adversarial testing for bias detection and performed extensive fact-checking to ensure data validity. • Authored and reviewed prompt-response pairs to support supervised fine-tuning. • Evaluated and rated model outputs for quality and compliance. • Researched and fact-checked to ensure accuracy and mitigate biases. • Collaborated asynchronously with research and engineering teams to improve AI models.

As a freelance generalist AI trainer, I created, reviewed, and refined high-quality prompts and responses across technical and general domains to train AI systems. I evaluated and ranked AI outputs for factual accuracy, clarity, tone, and adherence to guidelines. I also conducted adversarial testing for bias detection and performed extensive fact-checking to ensure data validity. • Authored and reviewed prompt-response pairs to support supervised fine-tuning. • Evaluated and rated model outputs for quality and compliance. • Researched and fact-checked to ensure accuracy and mitigate biases. • Collaborated asynchronously with research and engineering teams to improve AI models.

2024 - 2025

AI Evaluator & Data Annotator

Text

In this position, I assessed AI-generated text for grammatical accuracy, coherence, and ethical safety within diverse domains. I produced detailed structured feedback to support improvements in AI model behavior. I maintained evaluation consistency and contributed to datasets for model fine-tuning and evaluation. • Evaluated text outputs for accuracy, coherence, and safety criteria. • Provided structured, actionable feedback to enhance model behavior. • Followed detailed project documentation and evaluation protocols. • Supported dataset creation for fine-tuning across multiple domains including creative, STEM, and general reasoning.

In this position, I assessed AI-generated text for grammatical accuracy, coherence, and ethical safety within diverse domains. I produced detailed structured feedback to support improvements in AI model behavior. I maintained evaluation consistency and contributed to datasets for model fine-tuning and evaluation. • Evaluated text outputs for accuracy, coherence, and safety criteria. • Provided structured, actionable feedback to enhance model behavior. • Followed detailed project documentation and evaluation protocols. • Supported dataset creation for fine-tuning across multiple domains including creative, STEM, and general reasoning.

2023 - 2023

Education

Work History