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S

Stella Murugi

LLM Trainer/Video Annotation Specialist

Kenya flagNairobi, Kenya
$25.00/hrExpertMicro1ClickworkerOther

Key Skills

Software

Micro1
ClickworkerClickworker
Other

Top Subject Matter

AI Model Evaluation and Data Annotation

Top Data Types

VideoVideo
Computer Code ProgrammingComputer Code Programming
ImageImage

Top Task Types

Text SummarizationText Summarization
Object DetectionObject Detection
Point/Key PointPoint/Key Point
Computer Programming/CodingComputer Programming/Coding
Data CollectionData Collection
Prompt + Response Writing (SFT)Prompt + Response Writing (SFT)
TranscriptionTranscription
Question AnsweringQuestion Answering
Text GenerationText Generation

Freelancer Overview

I am an LLM Trainer and Video Annotation Specialist with 7+ years of experience in data labeling, AI training workflows, and quality-focused execution. I have strong expertise in handling complex annotation tasks, including evaluation and rating across video and other data types, and I’m highly proficient in using internal and proprietary tools. I hold a Bachelor of Science (2019) and bring a solid foundation in research, accuracy, and process optimization. I consistently deliver high-quality outputs, maintain accuracy at scale, and adapt quickly to evolving AI training requirements.

ExpertEnglishSwahili

Labeling Experience

LLM Trainer/Video Annotation Specialist

Video
As a Video Annotation Specialist and LLM Trainer at TuringOwl, I was responsible for evaluating and improving outputs of Large Language Models. This included conducting structured prompt testing, response validation, and detailed data annotation to enhance model quality. I worked on AI alignment and contributed to workflows for model refinement. • Evaluated LLM outputs for accuracy, quality, and safety. • Performed data annotation on video and text data to identify issues and improve performance. • Utilized structured testing, error analysis, and feedback to refine AI model behavior. • Contributed to AI alignment projects by collaborating on model optimization tasks.

As a Video Annotation Specialist and LLM Trainer at TuringOwl, I was responsible for evaluating and improving outputs of Large Language Models. This included conducting structured prompt testing, response validation, and detailed data annotation to enhance model quality. I worked on AI alignment and contributed to workflows for model refinement. • Evaluated LLM outputs for accuracy, quality, and safety. • Performed data annotation on video and text data to identify issues and improve performance. • Utilized structured testing, error analysis, and feedback to refine AI model behavior. • Contributed to AI alignment projects by collaborating on model optimization tasks.

2025 - 2026

Education

J

Jomo Kenyatta University of Agriculture and Technology

Bachelor of Science, Mathematics and Computer Science

Bachelor of Science
2015 - 2019
K

Kyeni Girls High School

Kenya Certificate of Secondary Education, General Secondary Education

Kenya Certificate of Secondary Education
2011 - 2014

Work History

T

Turing

Data Annotator

Nairobi
2024 - 2025
K

Kopo Kopo Inc

Customer Support Associate

Nairobi
2023 - 2025