For employers

Hire this AI Trainer

Sign in or create an account to invite AI Trainers to your job.

LoginCreate account
Invite to Job
Genesis Hernandez

Genesis Hernandez

Jr. Data Scientist

Spain flagMadrid, Spain
$27.00/hrEntry LevelAppenLabelboxOneforma

Key Skills

Software

AppenAppen
LabelboxLabelbox
OneFormaOneForma
Other

Top Subject Matter

No subject matter listed

Top Data Types

AudioAudio
Computer Code ProgrammingComputer Code Programming
TextText

Top Task Types

Audio Recording
Computer Programming Coding
Data Collection
Evaluation Rating
Prompt Response Writing SFT

Freelancer Overview

I have practical experience in data labelling and AI-training workflows in Spanish and English, gained through work with Outlier AI and Aligner. I progressed to reviewer level in the Cypher Evals project, where I ensured label accuracy, resolved annotation inconsistencies, and applied detailed quality-control checks across complex linguistic and reasoning tasks. My work required precise judgement, adherence to evolving guidelines, and consistent delivery of high-quality outputs. I am currently part of an internal project called Phoenix, focused on reviewing and validating code-related tasks. This includes detecting logical errors, assessing model outputs, and refining prompts or instructions to strengthen performance. My background in analytics and structured problem-solving supports careful evaluation, rigorous documentation, and dependable decision-making across varied data types.

Entry LevelEnglishSpanish

Labeling Experience

Code evaluator and data annotator

OtherComputer Code ProgrammingClassificationEvaluation Rating
Worked on an internal project assessing the correctness, structure, and logic of model-generated code. Tasks included detecting functional errors, reviewing code snippets, validating outputs against instructions, and writing high-quality corrections or improved prompts. Also performed classification and RLHF-style evaluations to guide model behaviour. The project required precise analytical skills, careful documentation, and strong consistency in applying detailed technical guidelines.

Worked on an internal project assessing the correctness, structure, and logic of model-generated code. Tasks included detecting functional errors, reviewing code snippets, validating outputs against instructions, and writing high-quality corrections or improved prompts. Also performed classification and RLHF-style evaluations to guide model behaviour. The project required precise analytical skills, careful documentation, and strong consistency in applying detailed technical guidelines.

2025

Data annotator and reviewer

OtherTextClassificationText Summarization
Contributed to a multilingual LLM-evaluation project focused on improving model reliability, safety, and reasoning quality. Performed detailed annotation and rating of model outputs in Spanish and English, including classification, reasoning evaluation, prompt improvement, and safety-risk identification. Promoted to reviewer level, supervising quality standards, resolving annotation conflicts, providing corrective feedback, and ensuring full adherence to evolving guidelines. Work involved complex judgement calls, consistency checks, and high-precision annotation in a fast-paced environment.

Contributed to a multilingual LLM-evaluation project focused on improving model reliability, safety, and reasoning quality. Performed detailed annotation and rating of model outputs in Spanish and English, including classification, reasoning evaluation, prompt improvement, and safety-risk identification. Promoted to reviewer level, supervising quality standards, resolving annotation conflicts, providing corrective feedback, and ensuring full adherence to evolving guidelines. Work involved complex judgement calls, consistency checks, and high-precision annotation in a fast-paced environment.

2024 - 2025

Education

U

Universidad Complutense Madrid

Master’s, Data Science, Big Data and Business Analytics

Master’s
2023 - 2026
U

Universidad de Chile

Postgraduate Diploma, Magnetic Resonance Imaging

Postgraduate Diploma
2018 - 2020

Work History

O

Outlier AI

Freelance data annotator and reviewer

Madrid
2024 - Present
C

Centro de Imagen Diagnóstica Resona

Imaging Technician

Madrid
2021 - Present