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

WelocalizePorto, PortugalData Validation
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Salary
Not listed
Job type
Freelance
Work mode
Remote
Posted
16 Mar 2026
Status
Open · checked 9d ago

About this role

Enterprise AI Training Data & Human seeks a freelance Senior Prompt Engineer to handle the end-to-end technical migration workflow for template transitions to LLM autoraters. This remote, part-time position is based in Portugal and suits professionals skilled in prompt engineering and large language models.

Role Overview

The Senior Prompt Engineer manages the technical migration process required to move existing templates over to LLM autoraters. Operating within the Data Validation department, this freelance position requires utilizing specialized internal platforms to optimize model performance through advanced prompt techniques.

Key Responsibilities

Execute the complete end-to-end technical migration workflow for template transitions to LLM autoraters.
Utilize internal client tools to apply sophisticated prompt engineering strategies.
Maximize overall model performance and efficiency during the migration cycle.

Requirements

Proven expertise in prompt engineering and working with LLMs.
Ability to operate specialized internal platforms and tools effectively.
Capacity to manage technical migration workflows independently.

Skills and Tools

LLM
Prompt Engineering
Internal Client Migration Tools

About the Company

Enterprise AI Training Data & Human specializes in artificial intelligence training data solutions, providing expert human-in-the-loop services to support advanced machine learning models and large language model validation.

How to Apply

Interested candidates should visit the official company careers page at welodata.ai to submit their application for this remote freelance opportunity.

Skills and tech stack

Questions candidates ask

What is the employment type for this role?

This position is offered on a freelance, part-time basis.

Where is the job located?

The role is fully remote within Portugal, with the company listing a presence in Porto.

What are the primary responsibilities?

The engineer is responsible for managing the end-to-end technical migration workflow for transitioning templates to LLM autoraters and maximizing model performance.

What skills are required?

Candidates must have experience with LLMs and prompt engineering.

How can I apply?

Applicants should apply directly through the official company careers page at welodata.ai.

Ready to apply?

The application is on the official Welocalize careers page.

Apply on company site