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Angela Sofía Barajas Ochoa

Angela Sofía Barajas Ochoa

Advanced AI Data Trainer

Colombia flagBucaramanga, Colombia
$25.00/hrIntermediateSuperannotate

Key Skills

Software

SuperAnnotateSuperAnnotate

Top Subject Matter

Large Language Models
AI Training
Physics

Top Data Types

TextText
AudioAudio
DocumentDocument

Top Task Types

RLHFRLHF
ClassificationClassification
Evaluation/RatingEvaluation/Rating
Text GenerationText Generation

Freelancer Overview

I have three years of hands-on experience working in data labeling and AI training, specifically focused on improving large language models. In my role as an Advanced AI Data Trainer at Invisible Technologies, I worked on data training campaigns using Reinforcement Learning from Human Feedback (RLHF), helping enhance model performance and alignment. I was also responsible for developing and curating high-quality datasets, ensuring their accuracy, consistency, and relevance, which are key aspects for building reliable AI systems. More recently, as an Advanced Data Annotator at Fyxer AI, I applied advanced annotation and classification techniques to create robust datasets that improved the efficiency and effectiveness of LLM training processes. My background in physics has strengthened my analytical thinking and attention to detail, which I bring into every project. I am particularly strong at evaluating data quality, identifying patterns, and adapting quickly to new guidelines and workflows, allowing me to contribute effectively to complex AI training tasks.

IntermediateEnglishSpanish

Labeling Experience

Advanced Data Annotator

TextClassification
At Fyxer AI, I served as an Advanced Data Annotator specializing in text-based data annotation and classification. I utilized advanced techniques to create robust datasets that significantly enhanced LLM training processes. I ensured the datasets met stringent quality and efficiency standards. • Executed complex text annotation and classification projects. • Participated in iterative feedback cycles for continuous dataset improvement. • Applied detailed quality assurance procedures. • Contributed to optimizing data flows for AI applications.

At Fyxer AI, I served as an Advanced Data Annotator specializing in text-based data annotation and classification. I utilized advanced techniques to create robust datasets that significantly enhanced LLM training processes. I ensured the datasets met stringent quality and efficiency standards. • Executed complex text annotation and classification projects. • Participated in iterative feedback cycles for continuous dataset improvement. • Applied detailed quality assurance procedures. • Contributed to optimizing data flows for AI applications.

2025 - 2026

Advanced AI Data Trainer

TextRLHF
As an Advanced AI Data Trainer at Invisible Technologies, I executed data training campaigns for large language models (LLMs). I focused on enhancing model performance through Reinforcement Learning from Human Feedback (RLHF). I developed and curated high-quality training datasets to ensure improved accuracy and reliability of AI models. • Designed detailed RLHF workflows for effective LLM training. • Evaluated and rated AI model outputs to fine-tune responses. • Maintained data integrity and relevance across large-scale datasets. • Collaborated with cross-functional teams to optimize labeling strategies.

As an Advanced AI Data Trainer at Invisible Technologies, I executed data training campaigns for large language models (LLMs). I focused on enhancing model performance through Reinforcement Learning from Human Feedback (RLHF). I developed and curated high-quality training datasets to ensure improved accuracy and reliability of AI models. • Designed detailed RLHF workflows for effective LLM training. • Evaluated and rated AI model outputs to fine-tune responses. • Maintained data integrity and relevance across large-scale datasets. • Collaborated with cross-functional teams to optimize labeling strategies.

2022 - 2024

Education

I

Industrial University of Santander

Bachelor of Science, Physics

Bachelor of Science
2020 - 2025
U

University of Waterloo

Research Internship Certificate, Physics and Engineering

Research Internship Certificate
2024 - 2024

Work History

F

FYXER AI

Advanced Data Annotator

Bucaramanga
2025 - 2026
U

University of Waterloo

Research Intern

Waterloo
2024 - 2024