Joseph Mwita
@josephmwita
Experienced data annotation specialist focused on high-quality AI data.
What I'm looking for
I am a detail-driven data annotation specialist with hands-on experience labeling image, text, audio, and 3D datasets for machine learning projects. I have led annotation teams, developed QA protocols, and trained staff to improve productivity and annotation accuracy.
My background includes senior annotation roles where I collaborated with data scientists to refine workflows, implemented automated quality checks, and managed multiple projects to timely completion. I also worked as a freelance Swahili linguist providing translation, transcription, and cultural adaptation of content.
I bring strong technical familiarity with tools like Dataloop, CVAT, Labelbox and V7, along with attention to detail, time management, and effective communication — all applied with a mission-driven, collaborative approach.
Experience
Work history, roles, and key accomplishments
Freelance Swahili Linguist
Wecolize
Jan 2025 - Aug 2025 (7 months)
Provided Swahili translation, transcription, and proofreading services and developed original content, ensuring grammatical correctness and cultural appropriateness for client deliverables.
Executive Partner
Prospect 33
Mar 2023 - Dec 2024 (1 year 9 months)
Spearheaded strategic initiatives that expanded partnerships with leading firms and drove annual revenue growth, negotiated high-value contracts, and advised C-suite on talent acquisition to improve executive hiring outcomes.
Data Annotator
CVAT Company
Jan 2024 - May 2024 (4 months)
Annotated images, text, and audio datasets using various tools, contributed feedback to improve annotation guidelines, and assisted in developing automated quality checks to enhance accuracy.
Audio Annotator
Klatch Technologies
Jun 2022 - Feb 2023 (8 months)
Labeled and transcribed 1,000+ hours of multilingual audio, maintained annotation accuracy through QA checks, and trained team members to improve productivity by 25% while complying with data privacy standards.
Led an annotation team to deliver high-quality labeled data for ML projects, implemented QA processes, collaborated with data scientists to refine protocols, and trained new team members to ensure timely project completion.
Education
Degrees, certifications, and relevant coursework
Pwani University
Bachelor of Science, Nursing and Public Health
2020 - 2024
Bachelor of Science in Nursing and Public Health completed at Pwani University with focus on nursing practice and public health principles.
Kanga High School
Kenya Certificate of Secondary Education (K.C.S.E), Secondary Education
2016 - 2019
Completed secondary education and obtained the Kenya Certificate of Secondary Education (K.C.S.E).
Availability
Location
Authorized to work in
Job categories
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