Mary Mwangi

I am a detail-oriented data annotator and web developer with a strong track record of delivering high-quality labeled datasets for machine learning. At Samasource I consistently maintained over 98% annotation accuracy across text, image, video, and audio projects, and I routinely met daily productivity and quality targets.

I am proficient with annotation tools such as CVAT, Labelbox, Prodigy, and Supervisely, and I provide constructive feedback to improve annotation processes and tools. I also assist colleagues during high-volume periods to help teams maintain throughput and quality.

Earlier I worked as a web designer and developer, building custom WordPress themes and plugins and developing responsive sites using HTML5, CSS3, and JavaScript. I focused on UX/UI, site performance, accessibility, SEO, and used Git for version control.

I hold certifications in digital literacy, web research, and image annotation, along with diplomas and certificates in web and graphic design. I bring strong communication, task prioritization, and teamwork skills, and I seek roles where I can apply my annotation expertise and web development background to support ML initiatives and product-quality improvements.