Ian Chege

Key Skills

Software

Encord

Toloka

Remotasks

iMerit

Top Subject Matter

Speech Recognition

Natural Language Processing

Computer Vision - Generative AI

Top Data Types

Audio

Text

Image

Top Task Types

Transcription

Classification

Freelancer Overview

Data Annotation Specialist (Freelance / Independent Contractor). Brings 18+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Encord, Toloka, and Remotasks. Education includes Bachelor of Business Administration, United States International University. AI-training focus includes data types such as Audio, Text, and Image and labeling workflows including Transcription, Evaluation, and Rating.

Labeling Experience

Data Annotation Specialist (Freelance / Independent Contractor)

Image

I performed preference ranking for AI-generated images using iMerit’s Ango Hub platform. The task required nuanced judgment to rank outputs by quality, relevance, and user appropriateness. My rankings improved downstream training for generative AI and visual quality optimization.• Ranked images based on user and model oriented criteria. • Used iMerit Ango Hub to facilitate training workflows. • Provided subjective annotations to improve model understanding. • Supported continual improvement of generative AI quality.

I performed preference ranking for AI-generated images using iMerit’s Ango Hub platform. The task required nuanced judgment to rank outputs by quality, relevance, and user appropriateness. My rankings improved downstream training for generative AI and visual quality optimization.• Ranked images based on user and model oriented criteria. • Used iMerit Ango Hub to facilitate training workflows. • Provided subjective annotations to improve model understanding. • Supported continual improvement of generative AI quality.

2025 - Present

Data Annotation Specialist (Freelance / Independent Contractor)

TolokaImageClassification

I executed prompt-based image evaluation tasks to determine the best image match for given text prompts. This process required careful review of visual quality and prompt compliance. My work ensured the robustness and relevance of multimodal AI systems.• Analyzed images generated from text prompts. • Selected top-performing images for dataset inclusion. • Judged on criteria of prompt compliance and quality. • Supported the performance of multimodal AI training.

I executed prompt-based image evaluation tasks to determine the best image match for given text prompts. This process required careful review of visual quality and prompt compliance. My work ensured the robustness and relevance of multimodal AI systems.• Analyzed images generated from text prompts. • Selected top-performing images for dataset inclusion. • Judged on criteria of prompt compliance and quality. • Supported the performance of multimodal AI training.

2025 - Present

Data Annotation Specialist (Freelance / Independent Contractor)

RemotasksImageClassification

As a Data Annotation Specialist, I reviewed generative AI images against real images to select optimal outputs. This involved making comparative judgments on realism and quality of visual data. My work directly contributed to the enhancement of generative computer vision models.• Compared and classified real vs AI-generated images. • Selected images that demonstrated the highest realism. • Provided feedback to improve visual data model performance. • Aided in advancing generative AI models.

As a Data Annotation Specialist, I reviewed generative AI images against real images to select optimal outputs. This involved making comparative judgments on realism and quality of visual data. My work directly contributed to the enhancement of generative computer vision models.• Compared and classified real vs AI-generated images. • Selected images that demonstrated the highest realism. • Provided feedback to improve visual data model performance. • Aided in advancing generative AI models.

2025 - Present

Data Annotation Specialist (Freelance / Independent Contractor)

TolokaText

As part of a freelance Data Annotation Specialist role, I evaluated LLM outputs for accuracy, clarity, and contextual relevance. I performed model output ranking and assessment to enhance the effectiveness of AI natural language systems. This work helped improve performance for machine learning models utilizing human-in-the-loop evaluation.• Evaluated and ranked generative AI language model outputs. • Used subjective judgment to assess coherence, accuracy, and appropriateness. • Compared prompt-based responses for relevance. • Contributed to high-quality RLHF datasets.

As part of a freelance Data Annotation Specialist role, I evaluated LLM outputs for accuracy, clarity, and contextual relevance. I performed model output ranking and assessment to enhance the effectiveness of AI natural language systems. This work helped improve performance for machine learning models utilizing human-in-the-loop evaluation.• Evaluated and ranked generative AI language model outputs. • Used subjective judgment to assess coherence, accuracy, and appropriateness. • Compared prompt-based responses for relevance. • Contributed to high-quality RLHF datasets.

2025 - Present

Data Annotation Specialist (Freelance / Independent Contractor)

EncordAudioTranscription

As a Data Annotation Specialist, I performed detailed audio annotation and transcription alignment using Encord. My responsibilities included refining speech timestamps to waveform-level accuracy and ensuring transcripts met stringent quality standards. I worked to support high-quality datasets critical to AI speech model training.• Refined audio speech timestamps to ~20ms accuracy. • Corrected and validated transcripts for 99%+ accuracy. • Used Encord for precise waveform-level annotation. • Ensured alignment between transcribed content and original audio.

As a Data Annotation Specialist, I performed detailed audio annotation and transcription alignment using Encord. My responsibilities included refining speech timestamps to waveform-level accuracy and ensuring transcripts met stringent quality standards. I worked to support high-quality datasets critical to AI speech model training.• Refined audio speech timestamps to ~20ms accuracy. • Corrected and validated transcripts for 99%+ accuracy. • Used Encord for precise waveform-level annotation. • Ensured alignment between transcribed content and original audio.

2025 - Present

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Education

Work History