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O
Osmar Rosales

Osmar Rosales

AI Data Annotator & Model Evaluator

Spain flagValencia, Spain
$12.00/hrEntry LevelOther

Key Skills

Software

Other

Top Subject Matter

AI/ML model evaluation and natural language processing

Top Data Types

TextText
ImageImage

Top Task Types

Bounding BoxBounding Box
ClassificationClassification
Object DetectionObject Detection
Text GenerationText Generation
Evaluation/RatingEvaluation/Rating

Freelancer Overview

AI Data Annotator & Model Evaluator. Brings 2+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Other. Education includes Postgraduate Degree, Universidad Europea de Valencia (2023) and Bachelor of Science in Civil Engineering, Universidad Católica Andrés Bello (2020). AI-training focus includes data types such as Text and labeling workflows including Evaluation and Rating.

Entry LevelEnglishSpanish

Labeling Experience

AI Data Annotator & Model Evaluator

OtherText
As an AI Data Annotator & Model Evaluator at Human Signal, I was responsible for annotating and labeling large textual datasets according to strict quality guidelines. I also reviewed and evaluated AI-generated outputs to assess accuracy, relevance, and safety. Additionally, I ranked model responses and provided structured feedback to enhance overall AI model performance. • Maintained consistent and accurate annotations across all assigned tasks. • Ensured data quality and labeling integrity through detailed review processes. • Collaborated with team members to meet annotation quotas and project deadlines. • Developed familiarity with AI evaluation frameworks and structured feedback protocols.

As an AI Data Annotator & Model Evaluator at Human Signal, I was responsible for annotating and labeling large textual datasets according to strict quality guidelines. I also reviewed and evaluated AI-generated outputs to assess accuracy, relevance, and safety. Additionally, I ranked model responses and provided structured feedback to enhance overall AI model performance. • Maintained consistent and accurate annotations across all assigned tasks. • Ensured data quality and labeling integrity through detailed review processes. • Collaborated with team members to meet annotation quotas and project deadlines. • Developed familiarity with AI evaluation frameworks and structured feedback protocols.

2026 - 2026

Education

U

Universidad Europea de Valencia

Postgraduate Degree, Project Management, Building Information Modeling Management

Postgraduate Degree
2023 - 2023
U

Universidad Católica Andrés Bello

Bachelor of Science in Civil Engineering, Civil Engineering

Bachelor of Science in Civil Engineering
2015 - 2020

Work History

H

HumanSignal

AI Data Annotator & Model Evaluator

Valencia
2026 - 2026
G

Gelca Ingenieros Consultores

Junior Civil Engineer

Valencia
2023 - 2024