Sylviah Nyambura

Native Gikuyu language expert with extensive experience in linguistic evaluation, translation, localization, AI model training, data annotation, transcription, content moderation, and quality assurance. Recognized for delivering high-quality language judgments that improve the performance of advanced Artificial Intelligence systems and Large Language Models (LLMs). Possesses exceptional proficiency in Gikuyu, English, and Kiswahili, with demonstrated expertise in translating complex content while preserving meaning, context, cultural relevance, and linguistic accuracy.

Experienced in evaluating AI-generated content, ranking model outputs, conducting linguistic assessments, reviewing translations, annotating language datasets, and improving multilingual language technologies. A highly analytical and detail-oriented professional with a strong commitment to language preservation, linguistic excellence, and technological innovation. Adept at working independently in remote environments while consistently exceeding quality benchmarks and meeting strict project deadlines.

Senior AI Trainer & Language Evaluator - DataAnnotation - Remote

(2023-01 - 2023-12)

• Evaluate and improve AI-generated responses across various domains.
• Analyze linguistic quality, coherence, grammar, tone, and contextual accuracy.
• Provide detailed feedback used in training advanced language models.
• Assess multilingual outputs involving English and African language contexts.
• Review model responses for factual consistency and cultural appropriateness.
• Participate in reinforcement learning projects requiring human judgment and linguistic expertise.
• Maintained exceptional quality ratings across evaluation projects.
• Contributed to large-scale AI training initiatives supporting next-generation language models.
• Demonstrated consistent accuracy in complex language assessment tasks.

AI Data Annotation & Language Quality Specialist - Remotasks - Remote

(2022-01 - 2024-12)

• Annotate and review textual datasets for machine learning applications.
• Validate language data for consistency and correctness.
• Conduct quality checks on annotated content.
• Evaluate linguistic datasets used in AI training.
• Support multilingual data development initiatives.
• Successfully completed numerous annotation projects while maintaining strict quality standards.
• Consistently met project deadlines in fast-paced production environments.

Linguistic Evaluator & AI Response Reviewer - Outlier - Remote

(2024-01 - 2025-12)

• Review AI-generated outputs for accuracy and usefulness.
• Compare multiple model responses and rank them according to quality.
• Evaluate reasoning, linguistic structure, factuality, and clarity.
• Identify weaknesses and opportunities for model improvement.
• Contributed to optimization of advanced Large Language Models.
• Provided high-quality human feedback supporting AI system development.

Language Data Contributor & Quality Reviewer - Toloka - Remote

(2023-01 - 2025-12)

• Perform language validation and data annotation.
• Review translated content and identify linguistic inconsistencies.
• Classify and evaluate text according to project guidelines.
• Support multilingual AI development through language quality assessments.

Freelance English ↔ Gikuyu Translator & Localization Specialist - Self-Employed - Remote

(2021-01 - 2025-12)

• Translation of educational materials.
• Community outreach content translation.
• Survey and questionnaire localization.
• Business communication translation.
• Website content adaptation.
• Cultural localization consulting.
• Successfully translated diverse materials while preserving meaning and cultural context.
• Maintained high standards of linguistic precision and consistency.
• Developed expertise in adapting content for Gikuyu-speaking audiences.

M.A. - Applied Linguistics - University of Nairobi