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

1 hour, 57 minutes ago
Portugal
Freelance
Senior
Prompt Engineer
Data Science and Analytics
LLM SQL
Apply Now
Welocalize

Welocalize

Welocalize provides translation and localization services to help businesses reach global audiences with precision and efficiency.

Professional Services
1K-5K
Founded 1997
$34M raised
View All Jobs 144

Description

  • Lead the end-to-end technical migration workflow for transitioning templates to LLM autoraters.
  • Use Automatic Prompt Generation (APG) tools to create baseline prompts for complex parent-child template clusters.
  • Run and supervise Automated Prompt Optimization (APO) workflows and identify when optimization reaches deadlocks or plateaus.
  • Manually draft, test, and refine prompts for complex template architectures and edge cases.
  • Overcome anti-patterns and repair or work around broken or missing tooling with manual prompt design.
  • Monitor shadowbot runs to ensure disagreements between human and LLM ratings are generated, tracked, and sufficient.
  • Run prompt versions against gold data to measure autorater quality against the human crowd baseline.
  • Calculate evaluation metrics such as F1 score, precision, and recall.
  • Draft technical launch readiness justifications and Launch Certification Documentation.

Requirements

  • Native fluency in Portuguese and fluent English.
  • Must be based in Portugal.
  • Bachelor's, Master's, or Doctorate degree in Computer Science, Data Science, Computational Linguistics, Human-Computer Interaction, Cognitive Science, or a related analytical field.
  • At least 4 years of experience as a Prompt Engineer.
  • Proven experience tuning large language models for strict structured outputs and complex classification tasks.
  • Familiarity with chain-of-thought and few-shot learning.
  • Strong proficiency in identifying error patterns, analyzing model performance, and using SQL or other data analytics tools.
  • Ability to quickly learn and master proprietary tools with minimal supervision.
  • Excellent verbal and written communication skills.
  • Preferred: Familiarity with enterprise-grade LLM interfaces such as the Goose API.
  • Preferred: Experience in AI model evaluation, data science, computational linguistics, or software engineering.
  • Preferred: Hands-on experience with Automated Prompt Optimization (APO) systems or tuning workflows.
  • Preferred: Linguistic expertise, including an understanding of semantics and logic.

Benefits

  • Remote work arrangement.
  • Part-time freelance position.
  • Opportunity to work on AI services and data validation work.
  • Use of internal proprietary tools and advanced LLM workflows.

Interested in this position?

Apply directly on the company website

Apply Now

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