EPHANTUS KAMAU
@ephantuskamau
Data Annotation Specialist focused on LiDAR, vision, and prompt engineering.
What I'm looking for
I am a detail-oriented Data Annotation Specialist with extensive hands-on experience in LiDAR 2D/3D annotation, image annotation and segmentation, text annotation, and prompt engineering. I have worked on autonomous vehicle training datasets and in remote, outsourced settings where accuracy and consistency were critical.
At Mindrift I designed, tested, and refined AI prompts and evaluated model responses to reduce bias and improve output quality, collaborating with global teams to optimize workflows. Previously I performed LiDAR and image annotation for Remotasks and provided technical support resolving GPS and device issues at an IT role, demonstrating strong problem-solving and client-focused communication.
I bring strong adaptability to remote collaboration tools (familiar with CVAT), rigorous attention to detail, and a proven track record of improving annotation quality and model performance. I am motivated to join teams where I can apply annotation expertise and prompt-engineering skills to advance AI systems.
Experience
Work history, roles, and key accomplishments
Prompt Engineer
Mindrift
Jan 2025 - Aug 2025 (7 months)
Designed, tested, and refined AI prompts and evaluated model responses to improve accuracy, reduce bias, and enhance output quality across remote, outsourced projects.
IT Support Specialist
Nyeri Ekas Technologies
Jan 2022 - Jun 2024 (2 years 5 months)
Troubleshot GPS connectivity and tracking issues, performed diagnostics on installed devices, and responded to client queries on speed governor and GPS performance to ensure compliance and uptime.
Performed LiDAR 2D/3D annotation and image annotation/segmentation for autonomous vehicle training, producing high-quality bounding boxes, cuboids, and semantic segmentation labels.
Education
Degrees, certifications, and relevant coursework
Kibabii University
Bachelor of Science, Computer Science
Completed a Bachelor of Science in Computer Science at Kibabii University, graduating in March 2021.
Njumbi High School
Kenya Certificate of Secondary Education (KCSE), Secondary Education
Grade: B+
Completed Kenya Certificate of Secondary Education with a B+ grade in 2015.
Tech stack
Software and tools used professionally
Availability
Location
Authorized to work in
Job categories
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