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Welocalize

Project Lion - Senior Prompt Engineer - Spain (Remote, Part-Time)

Welocalize

Published 19 Mar 2026
Spain
Remote
Freelancer

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Role Highlights

Languages used

SQL
S3

Key skills

Data Science
Data Analysis
Prompt Engineering
Computer Science
Written Communication
Optimization
LLMs
AI
Interfaces
API
Google Analytics
Console

Tools, Libraries and Frameworks

IOS

Description

Welocalize - Project Lion - Senior Prompt Engineer - Spain (Remote, Part-Time) Project Lion - Senior Prompt Engineer - Spain (Remote, Part-Time) Spain Welo Data - AI Services Data Validation / Freelance / Remote

Required Qualifications and Skills

The role requires native fluency in Spanish and fluency in English, with the candidate needing to be based in Spain. A Bachelor's, Master's, or Doctorate degree in Computer Science, Data Science, Computational Linguistics, Human-Computer Interaction (HCI), Cognitive Science, or a related analytical field is necessary. At least four years of experience as a Prompt Engineer is required, along with proven experience tuning Large Language Models (LLMs) for specific tasks and familiarity with certain learning techniques. Strong proficiency in data analysis, including identifying error patterns and using tools like SQL, is also essential. The ability to quickly learn proprietary tools with minimal supervision and excellent communication skills are also key requirements.

Disclaimer

Disclaimer: Job and company description information and some of the data fields may have been generated via GPT-4 summarisation and could contain inaccuracies. The full external job listing link should always be relied on for authoritative information.

About the company

Welocalize

Size

3385

Founded

HQ

New York, US

Public/Private

Privately Held

Description

For over 25 years, Welocalize has helped some of the world's largest organizations improve customer engagement through the power of localized content. Since our founding in 1997, we've been a leader in applying innovative technology and adopting AI to deliver the highest quality translations quickly, efficiently, and at scale. Our proven track record showcases tangible business outcomes, including higher marketing conversion rates, regulatory compliance, increased customer satisfaction and retention, intellectual property protection, higher adoption rates, and improved data with enhanced models. At the heart of our innovation is OPAL, our advanced Service Delivery Platform, ensuring every translation is fast, effortless, and impeccably accurate. This technology, combined with our extensive network of over 250,000 linguistic experts in more than 250 languages, allows us to deliver multilingual content transformation services that are unmatched in quality and relevance. Our global team of industry specialists is dedicated to enabling your teams to achieve global business outcomes. From translation and localization to NLP-enabled machine learning training data, and data annotation, we blend cutting-edge technology with human insight across every project.

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