Sthembile Ngcongo

Accuracy-focused AI Trainer Specialist with 1+ year hands-on experience in data annotation, labeling, and quality control for AI/ML projects. Skilled in image, video, text, and voice annotation following strict client guidelines. Consistently maintain 98%+ accuracy while meeting daily quotas. Looking to support AI development by delivering high-quality, consistent training data.

Data Collector at Cloudworkers (2024-10 – Present)

• Annotate and label text, image, and video data for AI training datasets
• Apply complex project guidelines to ensure consistency and accuracy
• Meet daily output targets while maintaining 98%+ accuracy rate
• Identify errors, flag low-quality data, and provide feedback

Annotator at RWS (2025-07 – Present)

• Perform image, video, and voice annotations for Ai learning models
• Classify data according to project specifications
• Conduct self checks and participate in QA reviews

Data Collector at Growdgen - Appen (2025-08 – Present)

• Collect and label data for AI/ML training purposes
• Verify data against client requirements and quality standards
• Manage multiple tasks and deadlines in a remote environment

Sales Assistant at Manci Funeral Services (2013-03 – 2017-12)

• Managed data entry and record-keeping with high accuracy

Bachelor of Arts in Psychology and Criminology – Unisa (2026)

Matric in Grade 12 – Mgwempisi Combined School (2012)