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EPHANTUS KAMAU

@ephantuskamau

Data Annotation Specialist focused on LiDAR, vision, and prompt engineering.

Kenya
Message

What I'm looking for

I seek remote or hybrid roles where I can apply annotation and prompt-engineering skills, work with collaborative teams, and contribute to high-quality AI model training and evaluation.

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

NT

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.

RE

Data Annotator

May 2017 - Jun 2023 (6 years 1 month)

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 logoKU

Kibabii University

Bachelor of Science, Computer Science

Completed a Bachelor of Science in Computer Science at Kibabii University, graduating in March 2021.

NS

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

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EPHANTUS KAMAU - Prompt Engineer - Mindrift | Himalayas