Project Lion - Senior Prompt Engineer - Portugal (Remote, Part-Time)
Welo Data · Porto, Portugal · Prompt engineering
Project Lion - Senior Prompt Engineer - Portugal (Remote, Part-Time) is an open role at Welo Data, located in Porto, Portugal.
Applications open on Welo Data’s own site. How we make money.
At a glance
- Pay
- Not disclosedWelo Data doesn't publish a rate for this listing
- Location
- Porto, Portugal
- Time commitment
- Not stated in the listing
- Experience
- Not stated in the listing
- Education
- Not stated in the listing
- Languages
- Not stated in the listing
- Work type
- Prompt engineering
- Listed
- Since Jul 20, last confirmed Oct 24
The work
Run the technical process of moving templates onto LLM autoraters, from start to finish.
What you would do
- Manage the full technical workflow of moving templates to LLM autoraters
- Apply prompt engineering techniques with internal tools to improve model performance
You're a fit if you
- know prompt engineering techniques
- can work with the client's internal tools
Summarised by HumanSourcer from Welo Data’s listing. Check the listing before you apply.
From Welo Data’s listing
“We are seeking a Prompt Engineer to be responsible for the end-to-end technical migration workflow for transitioning templates to LLM autoraters. The role is required to use client’s internal tools to leverage prompt engineering techniques to maximize model performance.”
About Welo Data: part of Welocalize. See the full profile →
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Frequently asked questions
How do I apply for the Project Lion - Senior Prompt Engineer - Portugal (Remote, Part-Time) role at Welo Data?
Applications go through Welo Data's own portal - HumanSourcer links to the listing and never collects applications or handles hiring. Welo Data's access model is "Open / self-serve" (Join community). This listing was first seen here on July 20, 2026 and was still live at the last check.
Is the Project Lion - Senior Prompt Engineer - Portugal (Remote, Part-Time) role at Welo Data remote?
This role is listed for: Porto, Portugal.
What does the Project Lion - Senior Prompt Engineer - Portugal (Remote, Part-Time) role at Welo Data pay?
Welo Data doesn't state a rate on this listing. HumanSourcer never fills that gap with an estimate, so the absence is the source's, not a hole in this page. Welo Data's profile shows what its rate-carrying listings do advertise.
What kind of work is Project Lion - Senior Prompt Engineer - Portugal (Remote, Part-Time)?
Prompt engineering. Multilingual evaluation, AI safety, search relevance and annotation
Is Welo Data a legitimate AI-training platform?
Welocalize AI-data community - and that relationship is rated "Confirmed" here because it can be checked against welodata.ai rather than taken on Welo Data's word. Confidence describes how well the ownership is evidenced. It is not a rating of how the platform treats the people who work for it, which no public source covers reliably.
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