Wambui Maina

Available to hire

Language

Swahili
Fluent
English
Fluent
Dutch
Advanced
Spanish; Castilian
Advanced
Portuguese
Advanced
Amharic
Intermediate

Work Experience

Data Annotation Specialist at Appen
February 1, 2022 - June 30, 2025
Annotated 500,000+ text and image items for AI training; Maintained 98%+ accuracy and reviewed 1,000+ AI responses daily; Developed annotation guidelines improving team efficiency by 15%.
Content Review & Data Annotation Associate at Telus International
August 1, 2018 - December 31, 2021
Reviewed 800+ AI responses daily for linguistic accuracy; Conducted A/B tests to evaluate output effectiveness; Produced a Swahili dataset improving AI training efficiency by 30%.
Swahili Verbatim Transcriptionist at RWS
February 1, 2026 - April 1, 2026
Transcribed audio recordings word-for-word in Swahili, faithfully preserving repetitions, fillers, pauses, and informal language such as 'eh', 'mm', and 'una ju a' to reflect authentic conversation. Handled code-switching accurately, maintaining the natural Swahili and English blend exactly as heard in each recording.
Content Review and Data Annotation Associate at Telus International
August 1, 2018 - December 1, 2021
Reviewed over 800 AI responses daily for linguistic accuracy in both Swahili and English. Conducted A/B tests to evaluate and compare AI output effectiveness, sharing findings with the quality team.

Education

Bachelor's Degree in Computer Science (Second Class Upper) at JKUAT
January 11, 2030 - December 24, 2025
Diploma in Linguistics (Distinction) at USIU
January 11, 2030 - December 24, 2025
Bachelor's Degree in Computer Science (Second Class Upper) at JKUAT
January 11, 2030 - December 24, 2025
Diploma in Linguistics (Distinction) at USIU
January 11, 2030 - December 24, 2025
Diploma in Linguistics at United States International University Africa (USIU Africa)
February 1, 2024 - March 1, 2026
Bachelor of Science in Computer Science at Jomo Kenyatta University of Agriculture and Technology
September 1, 2021 - December 1, 2023

Qualifications

Certified Data Annotation & AI Model Evaluation Specialist
January 1, 2024 - December 24, 2025
Certified Data Annotation & AI Model Evaluation Specialist
January 1, 2024 - December 24, 2025
Certified Data Annotation and AI Model Evaluation Specialist
January 1, 2024 - June 9, 2026

Industry Experience

Software & Internet, Professional Services, Media & Entertainment, Education, Other, Telecommunications