Oscar Reyes

Key Skills

Software

Google Cloud Vertex AI

Other

Internal/Proprietary Tooling

Top Subject Matter

No subject matter listed

Top Data Types

Computer Code Programming

Document

Geospatial Tiled Imagery

Top Task Types

Classification

Computer Programming Coding

Entity Ner Classification

Geocoding

Prompt Response Writing SFT

Freelancer Overview

Senior Full-Stack Engineer and CTO with over 20 years of experience in technology leadership and digital transformation. I possess a robust foundation in managing massive datasets to deliver real-time insights and optimizing complex software architectures. My expertise is backed by a Master’s in Project Management and an Executive MBA, combined with advanced technical specializations in Data Science, Data Mining, and Machine Learning. Recently, I have deepened my proficiency in Generative AI through certifications in Google Gemini and AI Leadership (2025). I specialize in projects requiring high-level technical accuracy, particularly in software engineering, defense intelligence, and geospatial data. My unique value lies in the ability to bridge the gap between complex data labeling requirements and strategic business objectives, ensuring high-quality outputs for model fine-tuning and SFT.

Labeling Experience

LLM Supervised Fine-Tuning (SFT) for Generative AI

Google Cloud Vertex AITextText GenerationEvaluation Rating

Created and refined high-quality prompt-response datasets to improve LLM instruction-following capabilities. Performed ranking and evaluation of model outputs based on accuracy, safety, and helpfulness, specifically for Spanish and English language models

Created and refined high-quality prompt-response datasets to improve LLM instruction-following capabilities. Performed ranking and evaluation of model outputs based on accuracy, safety, and helpfulness, specifically for Spanish and English language models

2025

Technical Code Annotation and Logic Verification

Internal Proprietary ToolingComputer Code ProgrammingQuestion AnsweringFine Tuning

ted complex code snippets in Python, Java, and JavaScript to train AI coding assistants. Tasks included identifying logic errors, labeling code for efficiency, and providing ground-truth explanations for programming-related queries

ted complex code snippets in Python, Java, and JavaScript to train AI coding assistants. Tasks included identifying logic errors, labeling code for efficiency, and providing ground-truth explanations for programming-related queries

2024 - 2025

Entity Extraction for Intelligence Documents

Internal Proprietary ToolingDocumentEntity Ner ClassificationClassification

Led the manual categorization and entity extraction (NER) of unstructured document datasets. Labeled critical information such as names, dates, and locations to train models intended for converting raw data into actionable intelligence.

Led the manual categorization and entity extraction (NER) of unstructured document datasets. Labeled critical information such as names, dates, and locations to train models intended for converting raw data into actionable intelligence.

2018 - 2019

Education

Work History