David C.

Key Skills

Software

Other

Mercor

Top Subject Matter

Multilingual audio prompt evaluation (English/Spanish)

AI training annotations (audio prompts, translation, localization)

Multilingual AI response evaluation using rubrics

Top Data Types

Audio

Text

Top Task Types

Prompt + Response Writing (SFT)

RLHF

Freelancer Overview

I'm a bilingual data annotator (English C1 / Spanish native) with hands-on experience across RLHF, prompt evaluation, audio annotation, and multilingual quality assurance. Across three platforms: DataAnnotation, Outlier AI, and Mercor. I've specialized in safety and PII evaluation, instruction-following assessment, and bilingual localization and reasoning tasks. Beyond annotation, I've worked at the supervisory level reviewing and calibrating distributed contractor teams for consistency and compliance across English and Spanish datasets. My background as an industrial and systems engineering student informs how I think about annotation work not just as individual tasks, but as quality processes at scale, with attention to consistency, error patterns, and rubric reliability.

Labeling Experience

Data Annotator, Mercor May 2026 - Present

MercorTextRLHF

Designed rubric criteria for evaluating multilingual AI model responses across English and Spanish. Evaluated AI model outputs for accuracy, relevance, and overall quality using self-designed and platform rubrics. Applied the rubrics to support consistent prompt-response assessment in ongoing multilingual projects. • Defined evaluation rubric criteria for model response quality • Scored and assessed AI outputs for accuracy and relevance • Used structured rubrics to ensure consistent multilingual judgments • Iterated on rubric usage across English/Spanish projects

2026 - Present

Data Annotator, DataAnnotation

OtherAudioPrompt + Response Writing (SFT)

Completed AI training annotation tasks involving audio prompts and related multilingual content. Performed safety and quality supervision on model-generated outputs to improve reliability. Worked with English and Spanish datasets to support multilingual model performance and localization. • Annotated or reviewed audio prompt related examples and outputs • Supervised safety and quality criteria for generated content • Supported bilingual translation and cultural/geographical localization tasks • Performed quality checks to improve multilingual dataset usefulness

2025 - 2025

Senior Supervisor, Outlier AI

OtherAudioEvaluation/Rating

Supervised multilingual audio prompt evaluation for AI training in English and Spanish. Ensured consistent annotation quality across a distributed team of contractors by reviewing and calibrating work. Approved audio prompts for downstream AI training data pipelines. • Reviewed prompt evaluations for accuracy, relevance, and quality • Coordinated multilingual annotation consistency across contractors • Conducted quality assurance checks on submitted audio prompt examples • Approved prompts for inclusion in AI training datasets

2025 - 2025

Education

Work History