Alexander Riera

Key Skills

Software

Appen

Clickworker

Labelbox

Internal/Proprietary Tooling

Top Subject Matter

No subject matter listed

Top Data Types

Text

Top Task Types

Classification

Evaluation Rating

Bounding Box

Freelancer Overview

I have hands-on experience in AI training and data labeling through platforms including CrowdGen, Alignerr, and Outlier. My work has involved evaluating model outputs, grading responses against detailed rubrics, identifying policy and safety violations, and improving prompt quality to enhance model performance. I have experience with structured annotation tasks, comparative response ranking, and edge-case detection tom improve accuracy and reliability. I am detail-oriented, consistent with guidelines, and comfortable working with evolving instructions. My background includes following complex evaluation frameworks, ensuring quality control, and maintaining high accuracy across large task volumes. I focus on clarity, precision, and alignment with project objective whiles meeting performance and turnaround expectations

Labeling Experience

Outlier - Aether Project

Internal Proprietary ToolingTextBounding BoxEvaluation Rating

Contribute to advanced model alignment and output evaluation tasks. Asses model-generated responses using structured evaluation frameworks, ranked outputs based on quality and reasoning, and provide detailed feedback to improve model performance.

Contribute to advanced model alignment and output evaluation tasks. Asses model-generated responses using structured evaluation frameworks, ranked outputs based on quality and reasoning, and provide detailed feedback to improve model performance.

2025

CrowdGen - Teapot Project

AppenTextClassificationEvaluation Rating

Working on AI model evaluation and response grading tasks for LLMs. Review and classify text outputs according to structured rubrics, focusing on accuracy, safety compliance, instruction adherence, and reasoning quality.

Working on AI model evaluation and response grading tasks for LLMs. Review and classify text outputs according to structured rubrics, focusing on accuracy, safety compliance, instruction adherence, and reasoning quality.

2025

Education

Work History