Spanish (Spain) Linguistic Evaluator & Functional Tester

Weloglobal

Barcelona, Spain

On-site

Who this role is best for

Strong fit for native-level Spanish (Spain) speakers who evaluate and test AI models in real-world contexts.

Best fit for

Candidates who thrive in hands-on, on-site roles involving AI model testing and evaluation
— “It's a hands-on, on-site role that combines two things: evaluating a pre-release AI model in your language, and testing how the product actually performs on a client-supplied device”
Individuals who enjoy identifying subtle language and performance issues before they reach end users
— “If you enjoy noticing the detail other people miss, this is work you'll find satisfying”

Things to consider

The role requires on-site presence in Barcelona, Spain, and may not allow remote flexibility
— “hands-on, on-site role”
Candidates must be prepared to evaluate AI outputs for naturalness and cultural alignment, which demands deep language expertise
— “Review pre-release AI model output in Spanish (Spain) and judge it on accuracy, naturalness, appropriateness, and overall quality”

How to stand out

Emphasize your ability to test technology on real devices and provide actionable feedback
— “testing how the product actually performs on a client-supplied device”
Showcase your native-level fluency and your ability to detect subtle linguistic nuances
— “native-level Spanish (Spain) speaker to join a large-scale AI and consumer technology programme”
Include examples of fact-checking and cross-referencing AI output with source material
— “fact-checking each response against the source material”
Demonstrate your ability to work on confidential, large-scale projects with major global clients
— “confidential, large-scale AI and consumer technology programme for a major global technology and communications client”

Pace · SteadyCollaboration · LowAutonomy · MediumDecision Impact · Team

Derived from job-description analysis by Serendipath's career intelligence engine.

What success looks like

accurate evaluation of AI model outputs
improvement in AI model performance

Typical background

native-level Spanish speakerexperience in AI model evaluation

Skills & requirements

Required

Natural Language ProcessingAI Model EvaluationFact-checking

Preferred

Machine LearningData Analysis

About the role

Original posting from Weloglobal via Lever

About Welocalize
Welocalize, a Welo Global brand, serves localization teams through AI-enabled multilingual content solutions that enable enterprises to operate and scale globally. Welocalize combines AI, automation, and human expertise to support enterprises in more than 300 languages, enabling accurate, culturally aligned, and compliant multilingual content at scale.
Welocalize’s Opal Platform comprises patented technology designed to automate multilingual content and improve workflow performance for enterprises. Opal functions as an agentic system that orchestrates AI, automation, and human expertise to coordinate content workflows across the lifecycle, improving speed, scalability, and operational control for global enterprises. These solutions operate within a secure and compliant environment supported by seven ISO certifications. Welocalize is headquartered in New York with offices worldwide. welocalize.com
ROLE OVERVIEW
Welocalize is looking for a native-level Spanish (Spain) speaker to join a confidential, large-scale AI and consumer technology programme for a major global technology and communications client.
It's a hands-on, on-site role that combines two things: evaluating a pre-release AI model in your language, and testing how the product actually performs on a client-supplied device — a smartphone and a next-generation smart glass. If you enjoy noticing the detail other people miss, this is work you'll find satisfying.
Welocalize is looking for a native-level Spanish (Spain) speaker to join a large-scale AI and consumer technology programme.
It's a hands-on, on-site role that combines two things: evaluating a pre-release AI model in your language, and testing how it performs on a real device. You'll be among the first people to see this technology in Spanish (Spain), and your judgement shapes how well it works before anyone else uses it.
If you enjoy noticing the detail other people miss, this is work you'll find satisfying.
MAIN RESPONSIBILITIES
Review pre-release AI model output in Spanish (Spain) and judge it on accuracy, naturalness, appropriateness, and overall quality — would a native speaker really say it this way? This includes fact-checking each response against the source material.

Source: Weloglobal careers (Lever)