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Certified Quality Assurance and Data Annotation Specialist with 5+ years of experience delivering high-precision AI/ML labeling and QA in remote environments. I specialize in improving annotation accuracy for LLM, NLP, and 3D LiDAR projects while ensuring strong inter-annotator agreement and reliable quality audits. I also provide high-level virtual assistance, supporting executive operations through scheduling, inbox management, CRM maintenance, and team coordination. I’m solution-oriented with a B.Sc. in Computer Science and strong experience bridging technical AI workflows with day-to-day operational excellence.…Certified Quality Assurance and Data Annotation Specialist with 5+ years of experience delivering high-precision AI/ML labeling and QA in remote environments. I specialize in improving annotation accuracy for LLM, NLP, and 3D LiDAR projects while ensuring strong inter-annotator agreement and reliable quality audits. I also provide high-level virtual assistance, supporting executive operations through scheduling, inbox management, CRM maintenance, and team coordination. I’m solution-oriented with a B.Sc. in Computer Science and strong experience bridging technical AI workflows with day-to-day operational excellence.

Martha Nkan

Data Annotator, AI Engineer, AI Prompt Engineer, +6

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Certified Quality Assurance and Data Annotation Specialist with 5+ years of experience delivering high-precision AI/ML labeling and QA in remote environments. I specialize in improving annotation accuracy for LLM, NLP, and 3D LiDAR projects while ensuring strong inter-annotator agreement and reliable quality audits. I also provide high-level virtual assistance, supporting executive operations through scheduling, inbox management, CRM maintenance, and team coordination. I’m solution-oriented with a B.Sc. in Computer Science and strong experience bridging technical AI workflows with day-to-day operational excellence.…Certified Quality Assurance and Data Annotation Specialist with 5+ years of experience delivering high-precision AI/ML labeling and QA in remote environments. I specialize in improving annotation accuracy for LLM, NLP, and 3D LiDAR projects while ensuring strong inter-annotator agreement and reliable quality audits. I also provide high-level virtual assistance, supporting executive operations through scheduling, inbox management, CRM maintenance, and team coordination. I’m solution-oriented with a B.Sc. in Computer Science and strong experience bridging technical AI workflows with day-to-day operational excellence.

Available to hire

Certified Quality Assurance and Data Annotation Specialist with 5+ years of experience delivering high-precision AI/ML labeling and QA in remote environments. I specialize in improving annotation accuracy for LLM, NLP, and 3D LiDAR projects while ensuring strong inter-annotator agreement and reliable quality audits.

I also provide high-level virtual assistance, supporting executive operations through scheduling, inbox management, CRM maintenance, and team coordination. I’m solution-oriented with a B.Sc. in Computer Science and strong experience bridging technical AI workflows with day-to-day operational excellence.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Work Experience

Virtual Assistant at YouCreate Africa / Brave Achievers

July 1, 2024 - November 1, 2025

Provided executive support including scheduling and travel arrangements with 100% timeliness. Streamlined team coordination using communication tools (Zoom, Trello, Discord), improving coordination by 30%. Implemented a digital filing system that improved information retrieval by 30%.

Data Annotation Specialist (Freelance) at Minddraft (Toloka Platform)

March 1, 2024 - August 1, 2025

Completed multimodal tasks such as fact-checking and prompt-image relevance checks with a 99% acceptance rate. Resolved ambiguities to ensure high-fidelity data for generative AI models.

Virtual Assistant (Freelance Agency) at Executive Pro

December 1, 2023 - March 1, 2025

Managed executive calendars and inboxes, reducing scheduling conflicts. Conducted market research and lead generation to support client business development. Created reports and high-engagement content that increased audience engagement by 25%.

AI/ML Quality Assurance Specialist at Hugo Technologies

February 1, 2022 - December 1, 2025

Led QA operations for large-scale 3D LiDAR and multimodal AI projects, improving model precision by 20%. Built automated QA scripts and Excel workflows to reduce manual review time by 30%. Trained and mentored 30+ annotators, increasing inter-annotator agreement from 85% to 95%. Developed performance dashboards in Power BI to monitor error patterns and data trends.

Data Annotation Specialist at Hugo Technologies / Pallon

July 1, 2020 - March 1, 2024

Managed end-to-end workflows for NLP, LLM, and 3D LiDAR computer vision projects. Reduced labeling errors by 15% using structured double-review systems. Processed up to 200 images per day for defect detection with 98%+ accuracy.