Cornélio M.

Key Skills

Software

Labelbox

Scale AI

Label Studio

Toloka

CVAT

Top Subject Matter

Artificial Intelligence & Machine Learning (AI/ML)

Natural Language Processing (NLP

Data Annotation & AI Training Operations

Top Data Types

Text

Top Task Types

RLHF

Freelancer Overview

AI Trainer & Data Annotator with 4+ years of experience working on quality-focused workflows involving text evaluation, data annotation, and AI training support. Experienced in handling text-based datasets, applying annotation guidelines, reviewing AI-generated responses, and contributing to RLHF (Reinforcement Learning from Human Feedback) workflows. Strong ability to maintain accuracy, consistency, and attention to detail while working with large volumes of data and complex instructions. Skilled in text classification, response ranking, content evaluation, prompt analysis, and quality assurance for AI systems. Known for analytical thinking, fast adaptation to new guidelines, and reliable execution under deadline-driven environments. Education includes a High School Diploma / Secondary School completion (2024), with continued focus on AI training methodologies, data labeling standards, and machine learning support processes.

Labeling Experience

Data Annotation & Labeling

ImageClassification

Annotation and categorization of datasets used for machine learning and AI model training workflows.

2022 - Present

AI Content Evaluation

TextRLHF

Evaluation and review of AI-generated responses to improve accuracy, relevance, reasoning quality, and instruction-following performance.

2021 - Present

AI Quality Assurance & Validation

Computer Code ProgrammingComputer Programming/Coding

Quality review of labeled datasets and AI-generated content to ensure compliance with project guidelines and model training standards.

2024 - Present

AI Trainer & Data Annotator

OtherTextRLHF

I participated in the training and evaluation of large language models using structured data annotation and RLHF feedback. My role involved ensuring model safety and behavior through systematic quality assurance and prompt testing. I collaborated with global teams to continuously improve AI output standards. • Provided RLHF feedback for LLMs via annotation and evaluation tasks. • Performed structured data annotation on various text-based datasets. • Conducted prompt testing and assessed model responses for quality. • Ensured alignment and safety of AI behaviors using established guidelines.

2024 - Present

Education

Work History