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

Student-Friendly Entry-Level
Company

Welocalize

Location

Spain, Spain

Posted

June 04, 2026

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About This Opportunity

 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.

Responsibilities: 


  • Utilize Automatic Prompt Generation (APG) tools to create baseline prompts for complex parent-child template clusters.



  • Run and supervise Automated Prompt Optimization (APO) tool, review the outputs, and flag when the APO reaches deadlocks or plateaus.



  • Manually draft, test, and refine prompts to navigate complex template architectures, overcome anti-patterns, and handle edge cases where tooling is lacking or broken. Solve edge-case scenarios by designing and refining manual prompts.



  • Monitor shadowbot runs to ensure sufficient disagreements (between human and LLM ratings) are registere...