Ruth Mangisa
@ruthmangisa
Detail-oriented AI Data Trainer and Game Tester with creative skills.
What I'm looking for
I am a detail-oriented and creative AI Data Trainer and Game Tester with over four years of experience in data annotation, monitoring and evaluation, and project coordination. My expertise lies in evaluating AI models, video annotation, and immersive content testing. I am passionate about storytelling, gaming, and enhancing user experience in both AI and gaming environments.
Throughout my career, I have proven my ability to deliver high-quality structured data and content while working in remote, fast-paced teams supporting leading platforms like uTest, Toloka, and Mindrift. My role as an AI Data Trainer at Invisible Technologies involved annotating and reviewing AI-generated content, ensuring narrative consistency and context accuracy. I also created video captions and original descriptions, providing valuable feedback in both technical and creative contexts.
As a Freelance Game Tester, I have tested pre-release games for functionality and playability, reported bugs, and evaluated narrative coherence. My experience as a Data Officer at TRUE involved managing datasets for public health research, drafting reports, and ensuring ethical data handling. I am also actively engaged in creative projects, including designing an interactive fiction prototype that explores AI-human relationships.
Experience
Work history, roles, and key accomplishments
Freelance Game Tester
uTest, Toloka, Mindrift
Jan 2023 - Present (2 years 5 months)
Tested pre-release games for functionality, playability, and consistency across devices, reporting bugs and UI/UX issues using platform-specific tools. Evaluated dialogue, storyline, and game mechanics for narrative coherence and participated in training simulations to assess AI responsiveness.
AI Data Trainer & Video Captioning Trainer
Invisible Technologies
Nov 2022 - Mar 2025 (2 years 4 months)
Annotated and reviewed AI-generated content, ensuring narrative consistency, tone alignment, and context accuracy. Evaluated model outputs using structured rubrics to improve machine understanding and created video captions and original written descriptions for diverse video content.
Data Officer
TRUE (Training and Research Unit of Excellence)
Feb 2020 - Jul 2024 (4 years 5 months)
Managed and validated datasets for public health research projects, drafting statistical and narrative reports for stakeholders. Ensured ethical standards in data handling and processing, while supporting field data teams with digital tool usage and technical issues.
Education
Degrees, certifications, and relevant coursework
DMI St. Eugene University
Bachelor of Science, Information Technology
ABMA Education
Advanced Diploma, Project Management
Polytechnic College
Diploma, Information Technology
Tech stack
Software and tools used professionally
Availability
Location
Authorized to work in
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