Data Clerk with AI Data Quality Expertise
Resume:
H I L L A R Y M A H U R A
K A H I G A
Highly skilled AI Data Annotation and Training professional with 8 years of experience in annotation, evaluation, validation, and quality assurance. Demonstrates high levels of accuracy, consistency, and efficiency in handling large-scale datasets, with advanced capabilities in labeling, segmentation, and transcription. Proficient in tools such as SRT, HALO, SamaHub, Labelbox, Hasty AI, and CVAT. Strong in analysis, auditing, and performance monitoring, with a focus on optimization and continuous improvement. Brings strong mentoring, communication, and coordination skills, ensuring effective team collaboration, compliance, and high productivity across AI data workflows.
Samasource, Nairobi, Kenya, Jan 2019 - Apr 2026
Quality Analyst
Freelance & Transcription Remote, Jan 2022 - Sep 2025 PROFESSIONAL SUMMARY
ACCOMPLISHMENTS
completed over 250,000+ data points across image, video, text, and audio datasets with high accuracy.
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improved annotation quality, reducing error rates across multiple projects through guideline refinement and feedback.
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trained and mentored 20+ annotators, enhancing team productivity and consistency.
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implemented quality control processes that reduced rework and improved dataset reliability.
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successfully managed 5+ large-scale projects, consistently meeting tight deadlines.
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improved ai model performance through precise prompt evaluation and data validation.
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utilized tools such as srt, halo, samahub, labelbox, hasty ai, and cvat to streamline workflows.
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identified and resolved data inconsistencies, improving overall annotation efficiency.
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WORK EXPERIENCE
conducted quality reviews on annotated image, video, and text datasets to ensure accuracy and consistency.
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evaluated annotator performance against project guidelines and provided actionable feedback.
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identified labeling errors and implemented corrective measures to improve overall dataset quality.
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ensured compliance with annotation standards, including bounding box and polygon accuracy.
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performed audits on completed tasks to maintain high-quality output across projects.
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collaborated with team leads and annotators to resolve quality issues and clarify guidelines.
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tracked quality metrics and reported performance trends to support continuous improvement.
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Nairobi, Kenya, 00100
hillarymahuramail@gmai
l.com
CONTACT
SKILLS
• ANNOTATION
• TRAINING
• EVALUATION
• VALIDATION
• QUALITYLABELING
• SEGMENTATION
• TRANSCRIPTION
• CONSISTENCY
• ANALYSIS
• MENTORING
• AUDITING
• COMPLIANCE
AI Data Annotation Specialist
Invisible Technology, Remote, Apr 2023 - Nov 2024
Advanced AI Data Trainer
Kobil, Kikuyu, Jan 2015 - Dec 2016
Assistant Manager And Supervisor
January 2018
Certificate
Work Readiness, image & videeo annotation and communication skills SamaSchool
January 2012
K.C.S.E
K.A.G M.C.DC secondary school
annotated image, video, text, and audio datasets with high accuracy and consistency.
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applied bounding box, polygon, and segmentation techniques for object detection tasks.
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performed prompt evaluation and data labeling for ai model training and improvement.
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ensured adherence to annotation guidelines and project-specific instructions.
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• identified inconsistencies and escalated issues for resolution .
• reviewed and corrected annotated data to maintain quality standards.
• handled large-scale datasets while meeting tight deadlines. utilized annotation tools such as labelbox and cvat for efficient data labeling.
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trained and guided annotators on complex ai data labeling tasks, improving team accuracy and consistency across projects.
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completed over 400,000+ data points across multiple datasets, ensuring high-quality outputs for model training.
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conducted prompt evaluation and refinement, enhancing ai model responses and performance.
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developed and implemented annotation guidelines, reducing error rates and rework.
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reviewed and validated annotated data to maintain strict quality standards.
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utilized tools such as labelbox, cvat, srt, halo, and samahub for efficient workflow management.
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Supervised hourly and temporary personnel, provided work direction and reviewed work processes.
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Assisted manager to control inventory strategically, resulting in reduced costs.
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Oversaw team productivity and results to attain revenue goals and performance targets.
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Worked with management team to react to customer service issues, customer complaints and business opportunities.
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Addressed and resolved customer inquiries and complaints to restore satisfaction.
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Trained team members on appropriate application of policies and procedures.
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Conducted performance reviews for direct reports and recommended improvement strategies.
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EDUCATION
January 2008
K.C.P.E
Kaheti Primary School
English
Bilingual Or
Proficient (C2)
Swahili
Advanced (C1)
PROFILE & PORTFOLIO
• www.linkedin.com/in/hillary-mahura-a17518128
LANGUAGES
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