James Mumba
@jamesmumba
Freelance Japanese and Chinese translator and AI content quality analyst improving language accuracy and compliance.
KenyaWhat I'm looking for
I help teams communicate clearly across Japanese, Chinese (Mandarin), and English through business, legal, and marketing translation, along with consecutive and written interpretation. Since January 2022, I’ve localized product documentation and user interfaces for Japanese and Chinese markets, delivering work that prioritizes linguistic accuracy and cultural appropriateness—backed by a 98% client satisfaction rate across 50+ projects.
I also support AI content reliability by auditing and refining AI-generated English for tone, accuracy, and policy compliance. In my roles as an AI content reviewer and content writer/editor, I improved model performance through quality assurance rubrics and consistency checks, achieved a consistent productivity rate of 50 tasks per day, and scaled data labeling and content refinement efforts to handle 2,000 datasets per month efficiently.
Experience
Work history, roles, and key accomplishments
Audited and refined AI-generated English content for tone, accuracy, and policy compliance. Improved model performance using quality assurance rubrics and by flagging inconsistencies.
Japanese & Chinese Translator
Freelance
Jan 2022 - Present (4 years 7 months)
Translated business, legal, and marketing documents between Japanese, Chinese (Mandarin), and English, ensuring linguistic accuracy and cultural appropriateness. Provided consecutive and written interpretation, and localized product documentation and user interfaces for Japanese and Chinese markets.
Refined and optimized content to improve AI training and marketing datasets, ensuring compliance with U.S. business and editorial standards. Streamlined data labeling and content refinement to scale to 2,000 datasets per month.
Education
Degrees, certifications, and relevant coursework
University of Nairobi
Bachelor of Information Technology, Information Technology
Bachelor degree in Information Technology from the University of Nairobi.
Tech stack
Software and tools used professionally
Availability
Location
KenyaAuthorized to work in
Salary expectations
Job categories
Skills
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