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Hector Mejia

AI Model Evaluator & Prompt Engineer (Contract)

El Salvador flagEl Salvador, El Salvador
$5.00/hrIntermediateTolokaMindriftScale AI

Key Skills

Software

TolokaToloka
MindriftMindrift
Scale AIScale AI

Top Subject Matter

AI Model Prompt Engineering and Evaluation
Legal Services & Contract Review
Regulatory Compliance & Risk Analysis

Top Data Types

TextText
DocumentDocument
ImageImage

Top Task Types

Prompt + Response Writing (SFT)Prompt + Response Writing (SFT)
Text GenerationText Generation
Text SummarizationText Summarization
Evaluation/RatingEvaluation/Rating
Object DetectionObject Detection
ClassificationClassification

Freelancer Overview

AI Model Evaluator & Prompt Engineer (Contract). Brings 7+ years of professional experience across legal operations, contract review, compliance, and structured analysis. Core strengths include Internal and Proprietary Tooling. Education includes Bachelor of Law, Universidad Centroamericana Jose Simeon Canas (2023) and High School Diploma, Alberto Masferrer Catholic School (2017). AI-training focus includes data types such as Text and labeling workflows including Prompt + Response Writing (SFT).

IntermediateEnglishSpanish

Labeling Experience

AI Model Evaluator & Prompt Engineer (Contract)

TextPrompt Response Writing SFT
I created prompts and responses to train and test AI models, ensuring content adhered to guidelines in both English and Spanish. My work involved reviewing, rating, and multi-dimensional evaluation of AI outputs for safety, coherence, accuracy, and style. I compared and evaluated multiple AI systems to identify strengths, risks, and areas needing improvement. • Developed and curated text prompts and responses for AI model SFT tasks • Conducted rigorous evaluation and rating of model outputs on multiple criteria • Reviewed and provided feedback on prompt engineering and response quality • Compared system performance and documented risks and improvement recommendations

I created prompts and responses to train and test AI models, ensuring content adhered to guidelines in both English and Spanish. My work involved reviewing, rating, and multi-dimensional evaluation of AI outputs for safety, coherence, accuracy, and style. I compared and evaluated multiple AI systems to identify strengths, risks, and areas needing improvement. • Developed and curated text prompts and responses for AI model SFT tasks • Conducted rigorous evaluation and rating of model outputs on multiple criteria • Reviewed and provided feedback on prompt engineering and response quality • Compared system performance and documented risks and improvement recommendations

2025 - Present

AI Safety & Risk Evaluator

TextPrompt Response Writing SFT
Project aimed towards analyzing model's effectiveness towards providing answers within a specific safety spectrum. Text data was evaluated to identify possilby risky and/or harmful responses, with 3-5 weekly Quality reviews to ensure compliance with Client guidelines.

Project aimed towards analyzing model's effectiveness towards providing answers within a specific safety spectrum. Text data was evaluated to identify possilby risky and/or harmful responses, with 3-5 weekly Quality reviews to ensure compliance with Client guidelines.

2025 - 2025

Education

A

Alberto Masferrer Catholic School

High School Diploma, General Studies

High School Diploma
2010 - 2017
U

Universidad Centroamericana Jose Simeon Canas

Bachelor of Law, Law

Bachelor of Law
2023

Work History

C

Concentrix

Fraud & Risk Prevention Specialist

El Salvador
2023 - Present
C

Concentrix

Quality Assurance Agent

El Salvador
2021 - 2023