Chizobam Elemba

Key Skills

Software

Other

Scale AI

Toloka

Mercor

Clickworker

Appen

Lionbridge

Top Subject Matter

LLM Output Evaluation

Speech Recognition and NLP

NLP/Content Moderation

Top Data Types

Text

Audio

Image

Video

Document

Top Task Types

Transcription

Classification

Segmentation

Prompt + Response Writing (SFT)

Freelancer Overview

Rubric Grading Expert. Brings 5+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Other, Scale AI, and Toloka. Education includes Bachelor of Science, Michael Okpara University of Agriculture, Umudike Umuahia. AI-training focus includes data types such as Text, Audio, and Image and labeling workflows including Evaluation, Rating, and Transcription.

Labeling Experience

Rubric Grading Expert

OtherText

As a Rubric Grading Expert at Outlier AI, I evaluated AI outputs using detailed, domain-specific rubrics. I provided structured feedback to improve LLM response accuracy and compliance. My expertise contributed to the enhancement of model reasoning and response standards. • Evaluated diverse AI-generated text across subject matters. • Used feedback loops to fine-tune LLM performance. • Worked alongside other rubric experts for consistent standards. • Ensured rubrics were adhered to in all assessment sets.

As a Rubric Grading Expert at Outlier AI, I evaluated AI outputs using detailed, domain-specific rubrics. I provided structured feedback to improve LLM response accuracy and compliance. My expertise contributed to the enhancement of model reasoning and response standards. • Evaluated diverse AI-generated text across subject matters. • Used feedback loops to fine-tune LLM performance. • Worked alongside other rubric experts for consistent standards. • Ensured rubrics were adhered to in all assessment sets.

2024 - 2025

LLM Trainer / Video Annotation Specialist

MercorVideoClassification

As an LLM Trainer and Video Annotation Specialist at Mercor, I labeled multimodal video datasets and enhanced dataset reliability through QA pipelines. My efforts increased LLM accuracy by 15% on visual tasks. I ensured videos were correctly annotated for downstream AI applications. • Conducted video frame labeling and classification. • Developed and maintained QA processes for consistency. • Worked collaboratively to meet dataset targets. • Provided feedback to improve labeling guidelines.

As an LLM Trainer and Video Annotation Specialist at Mercor, I labeled multimodal video datasets and enhanced dataset reliability through QA pipelines. My efforts increased LLM accuracy by 15% on visual tasks. I ensured videos were correctly annotated for downstream AI applications. • Conducted video frame labeling and classification. • Developed and maintained QA processes for consistency. • Worked collaboratively to meet dataset targets. • Provided feedback to improve labeling guidelines.

2023 - 2024

Audio AI Trainer

Scale AIAudioTranscription

As an Audio AI Trainer at Scale AI, I annotated and transcribed large audio datasets for speech recognition and NLP. My work refined annotation protocols and improved transcription accuracy by 18%. I contributed directly to advancing audio model reliability and understanding. • Processed hundreds of audio files for linguistic features. • Refined labeling guidelines for higher quality transcripts. • Collaborated with a remote annotation team. • Supported quality assurance for final datasets.

As an Audio AI Trainer at Scale AI, I annotated and transcribed large audio datasets for speech recognition and NLP. My work refined annotation protocols and improved transcription accuracy by 18%. I contributed directly to advancing audio model reliability and understanding. • Processed hundreds of audio files for linguistic features. • Refined labeling guidelines for higher quality transcripts. • Collaborated with a remote annotation team. • Supported quality assurance for final datasets.

2023 - 2024

Data Annotation Specialist

OtherTextClassification

In my role as a Data Annotation Specialist at Louby AI, I labeled datasets for chat, search, and content moderation AI applications. I partnered with machine learning engineers to improve label speed and QA accuracy. My contributions supported robust dataset creation for advanced NLP models. • Annotated chat and search data for intent and moderation. • Maintained high speed without compromising label quality. • Participated in periodic team performance reviews. • Provided insights to optimize annotation workflow.

In my role as a Data Annotation Specialist at Louby AI, I labeled datasets for chat, search, and content moderation AI applications. I partnered with machine learning engineers to improve label speed and QA accuracy. My contributions supported robust dataset creation for advanced NLP models. • Annotated chat and search data for intent and moderation. • Maintained high speed without compromising label quality. • Participated in periodic team performance reviews. • Provided insights to optimize annotation workflow.

2022 - 2024

Image Annotation Specialist

TolokaImageSegmentation

As an Image Annotation Specialist for Toloka AI, I performed segmentation, bounding box, and classification on images for computer vision models. I reduced inconsistencies by 15% through rigorous quality assurance. My role contributed to enhanced accuracy of computer vision training data. • Used segmentation tools to delineate object boundaries. • Verified and corrected bounding box placements. • Classified images for model input. • Participated in QA and accuracy reports.

As an Image Annotation Specialist for Toloka AI, I performed segmentation, bounding box, and classification on images for computer vision models. I reduced inconsistencies by 15% through rigorous quality assurance. My role contributed to enhanced accuracy of computer vision training data. • Used segmentation tools to delineate object boundaries. • Verified and corrected bounding box placements. • Classified images for model input. • Participated in QA and accuracy reports.

2022 - 2023

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Education

Work History