Carlos Fernandez

Key Skills

Software

Appen

Data Annotation Tech

Scale AI

Telus

Top Subject Matter

No subject matter listed

Top Data Types

Audio

Image

Text

Top Task Types

Bounding Box

Polygon

Classification

Object Detection

Evaluation Rating

Segmentation

Transcription

Prompt Response Writing SFT

Freelancer Overview

I am an experienced AI content specialist and data annotator with a strong background in optimizing large language models through RLHF, SFT, and high-quality data labeling in both English and Spanish. My work spans various platforms, where I have contributed to improving model accuracy by conducting technical code evaluations, debugging, and precise categorization of complex linguistic and logical datasets. With a Ph.D. in Computer Science and extensive experience in translation and research, I bring strong analytical, multilingual, and detail-oriented skills to every project. My expertise lies in natural language processing, data annotation, and quality assurance for AI training data, ensuring robust and reliable model performance.

Labeling Experience

Response Rating and Evaluation

TelusTextEvaluation Rating

Assess artificial intelligence outputs for quality, accuracy, and relevance according to detailed guidelines, providing critical feedback to improve machine learning models for search engines, chatbots, or recommendation systems. Also reviewing datasets, rating AI-generated content and ensuring compliance with standards.

Assess artificial intelligence outputs for quality, accuracy, and relevance according to detailed guidelines, providing critical feedback to improve machine learning models for search engines, chatbots, or recommendation systems. Also reviewing datasets, rating AI-generated content and ensuring compliance with standards.

2024

AI Data Annotation Specialist

TelusImageBounding BoxPolygon

Annotate & Label: Tag, categorize, and review text, images, and documents. Collect Data: Gather and organize high-quality datasets for AI training. Ensure Quality: Review and validate data for precision and consistency.

Annotate & Label: Tag, categorize, and review text, images, and documents. Collect Data: Gather and organize high-quality datasets for AI training. Ensure Quality: Review and validate data for precision and consistency.

2024

Audio Segmentation and Transcription

AppenAudioSegmentationTranscription

Review and/or create audio segmentation and provide transcriptions, which contribute to the development of improved AI-powered speech recognition models.

Review and/or create audio segmentation and provide transcriptions, which contribute to the development of improved AI-powered speech recognition models.

2023

Advanced Mathematics Content Developer & AI Trainer (SME)

Scale AITextPrompt Response Writing SFT

Provide expert-level mathematical reasoning and problem solving to train LLMs, specializing in creating chain of thought, step-by-step solutions for high school level mathematics, including Algebra, Calculus, and Statistics. Other responsibilities include: fact-checking and error correction, rubric-based grading and prompt engineering.

Provide expert-level mathematical reasoning and problem solving to train LLMs, specializing in creating chain of thought, step-by-step solutions for high school level mathematics, including Algebra, Calculus, and Statistics. Other responsibilities include: fact-checking and error correction, rubric-based grading and prompt engineering.

2025 - 2025

Education

Work History