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Rubén Losada Noya

Rubén Losada Noya

Multilingual Content Moderator & AI Data Labeling Specialist (ES/GL/EN/FR)

Spain flagNarón, Spain
$15.00/hrIntermediateAppenData Annotation TechLabelbox

Key Skills

Software

AppenAppen
Data Annotation TechData Annotation Tech
LabelboxLabelbox
MercorMercor
MindriftMindrift
OneFormaOneForma
TelusTelus
Other
Internal/Proprietary Tooling

Top Subject Matter

No subject matter listed

Top Data Types

ImageImage
TextText
VideoVideo

Top Task Types

Classification
Evaluation Rating
Prompt Response Writing SFT
Text Generation
Translation Localization

Freelancer Overview

I’m an intermediate-level AI training and data labeling specialist with over one year of daily experience reviewing and annotating user-generated content on a large messaging platform, plus several years working with long-form text through Wikipedia contributions. My work focuses mainly on text and document data: I classify content against detailed safety and policy guidelines, evaluate the quality and tone of messages, and provide structured rationales that can be used as high-quality training data for machine-learning models. I have strong experience with classification, evaluation/rating, prompt + response writing, translation/localization and text generation, often working in Spanish, Galician and English. I’m very comfortable working in high-volume queues using internal/proprietary tools, following strict guidelines while still using my judgement on edge cases. My background in content moderation, online communities and multilingual writing helps me produce consistent, reliable annotations that improve model performance and user safety.

IntermediateGalicianFrenchEnglishItalianSpanishPortuguese

Labeling Experience

Multilingual LLM Output Evaluation and Prompt Writing

Internal Proprietary ToolingTextText GenerationTranslation Localization
Freelance AI training tasks focused on evaluating and improving large language model outputs. I rate model responses for correctness, clarity, tone and safety, compare alternative answers, and sometimes rewrite or extend them to provide higher-quality targets. In multilingual tasks I check translations between Spanish, Galician and English, flag literal or unnatural phrasing and propose more natural alternatives. I follow detailed written guidelines and use structured rating scales, aiming for high inter-annotator agreement and consistent application of the criteria.

Freelance AI training tasks focused on evaluating and improving large language model outputs. I rate model responses for correctness, clarity, tone and safety, compare alternative answers, and sometimes rewrite or extend them to provide higher-quality targets. In multilingual tasks I check translations between Spanish, Galician and English, flag literal or unnatural phrasing and propose more natural alternatives. I follow detailed written guidelines and use structured rating scales, aiming for high inter-annotator agreement and consistent application of the criteria.

2024

Long-Form Text Review and Rewrite for Wikipedia Articles

Internal Proprietary ToolingDocumentText GenerationTranslation Localization
Long-term work improving the quality of long-form Wikipedia articles in Spanish and Galician. I review existing content for clarity, neutrality and consistency, rewrite sections where needed, translate content from other languages and align articles with community guidelines. Although this is not a traditional “box-and-label” project, it requires continuous evaluation of text quality, disciplined application of style rules and careful handling of references and factual accuracy. This experience transfers directly to tasks that require detailed text evaluation, controlled rewriting and consistent application of written guidelines.

Long-term work improving the quality of long-form Wikipedia articles in Spanish and Galician. I review existing content for clarity, neutrality and consistency, rewrite sections where needed, translate content from other languages and align articles with community guidelines. Although this is not a traditional “box-and-label” project, it requires continuous evaluation of text quality, disciplined application of style rules and careful handling of references and factual accuracy. This experience transfers directly to tasks that require detailed text evaluation, controlled rewriting and consistent application of written guidelines.

2016

Policy-Based Text Classification for Messaging Platform

Internal Proprietary ToolingTextClassificationTranslation Localization
Text labeling work on a large messaging platform, focused on user-generated chats and reported content. I review messages in a high-volume queue, classify each case according to detailed safety and policy guidelines, and choose the appropriate action in a decision-based interface (e.g. clearing reports, removing specific messages, escalating uncertain cases or blocking abusive chats). For complex cases, I add written rationales and labels that help train and evaluate machine-learning models for content moderation. Quality is monitored through internal reviews, so I maintain high accuracy, consistency across similar cases and adherence to changing guidelines.

Text labeling work on a large messaging platform, focused on user-generated chats and reported content. I review messages in a high-volume queue, classify each case according to detailed safety and policy guidelines, and choose the appropriate action in a decision-based interface (e.g. clearing reports, removing specific messages, escalating uncertain cases or blocking abusive chats). For complex cases, I add written rationales and labels that help train and evaluate machine-learning models for content moderation. Quality is monitored through internal reviews, so I maintain high accuracy, consistency across similar cases and adherence to changing guidelines.

2024 - 2025

Education

U

Universidade da Coruña

Bachelor's Degree in Computer Engineering, Computer Engineering

Bachelor's Degree in Computer Engineering
2020 - 2022
I

I.E.S. Saturnino Montojo

Scientific High School Diploma, Science

Scientific High School Diploma
2017 - 2019

Work History

I

Independent Digital Media Brand

Community Ops Specialist

Remote
2022 - Present
T

Telegram Messenger (Telegraph Inc.)

Content Moderator

Remote
2024 - 2025