Ericjohnson Murimi

Key Skills

Software

CVAT

Scale AI

Top Subject Matter

No subject matter listed

Top Data Types

Video

Text

Top Label Types

Segmentation

Action Recognition

Tracking

Evaluation Rating

Question Answering

Text Generation

RLHF

Prompt Response Writing SFT

Freelancer Overview

I am an IT specialist with hands-on experience in data entry, database management, and technical support across healthcare and office environments. My background includes handling sensitive information, accurately processing electronic claims, performing biometric registration, and managing patient data, which has strengthened my attention to detail and data quality. I am skilled in using Microsoft Office Suite, database tools, and cloud productivity platforms, and have completed certifications in Python, AI, and automated machine learning. My academic projects and technical training have given me a strong foundation in data handling for AI and machine learning applications, and I am committed to delivering high-quality, reliable training data for AI systems.

Labeling Experience

LLM Training, Evaluation & RLHF Data Annotation

Scale AITextQuestion AnsweringText Generation

Contributed to the training and evaluation of large language models through supervised fine-tuning (SFT) and reinforcement learning from human feedback (RLHF). Tasks included writing high-quality prompts and reference responses, rating model outputs for accuracy, relevance, safety, and helpfulness, and ranking multiple responses based on detailed evaluation criteria. Identified hallucinations, logical inconsistencies, and policy violations to improve model reliability and alignment. Maintained strict adherence to annotation guidelines and quality benchmarks while working on diverse domains, including technical, business, and general knowledge tasks.

Contributed to the training and evaluation of large language models through supervised fine-tuning (SFT) and reinforcement learning from human feedback (RLHF). Tasks included writing high-quality prompts and reference responses, rating model outputs for accuracy, relevance, safety, and helpfulness, and ranking multiple responses based on detailed evaluation criteria. Identified hallucinations, logical inconsistencies, and policy violations to improve model reliability and alignment. Maintained strict adherence to annotation guidelines and quality benchmarks while working on diverse domains, including technical, business, and general knowledge tasks.

2024 - 2025

Video Action Recognition & Segmentation for AI Model Training

CVATVideoSegmentationAction Recognition

Annotated and segmented short-form and long-form video datasets to support action recognition and multimodal AI model training. Tasks included identifying and labeling human-object interactions, defining action boundaries using dense and coarse segmentation, and tracking object continuity across frames. Followed strict annotation guidelines to ensure consistency, accuracy, and temporal precision. Performed quality assurance reviews to detect mislabels, edge cases, and ambiguous actions, contributing to reduced model hallucinations and improved prediction reliability. Worked with high-volume datasets under tight deadlines while maintaining high annotation accuracy and adherence to project standards.

Annotated and segmented short-form and long-form video datasets to support action recognition and multimodal AI model training. Tasks included identifying and labeling human-object interactions, defining action boundaries using dense and coarse segmentation, and tracking object continuity across frames. Followed strict annotation guidelines to ensure consistency, accuracy, and temporal precision. Performed quality assurance reviews to detect mislabels, edge cases, and ambiguous actions, contributing to reduced model hallucinations and improved prediction reliability. Worked with high-volume datasets under tight deadlines while maintaining high annotation accuracy and adherence to project standards.

2024 - 2025

Education

Work History