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

3 hours, 5 minutes ago
France
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 workflow for migrating templates to LLM autoraters.
  • Use automatic prompt generation tools to create baseline prompts for complex parent-child template clusters.
  • Run and supervise automated prompt optimization workflows and identify deadlocks or plateaus.
  • Manually draft, test, and refine prompts for complex templates, edge cases, and broken tooling.
  • Design manual prompt solutions to overcome anti-patterns and tooling gaps.
  • Monitor shadowbot runs to ensure disagreements between human and LLM ratings are generated and tracked.
  • 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 certification documentation for release decisions.

Requirements

  • Native fluency in French and fluent English.
  • Must be based in France.
  • 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 LLMs for strict, structured outputs and complex classification tasks.
  • Familiarity with chain-of-thought and few-shot learning approaches.
  • Strong ability to identify error patterns and analyze model performance.
  • Experience using SQL or other data analytics tools.
  • Ability to quickly learn and master proprietary tools with minimal supervision.
  • Excellent verbal and written communication skills.
  • 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 systems or tuning workflows (preferred).
  • Linguistic expertise, including understanding of semantics and logic (preferred).

Benefits

  • Remote, part-time freelance arrangement.
  • Opportunity to work on an AI services/data validation project.
  • The role involves use of internal proprietary tools and LLM evaluation workflows.

Interested in this position?

Apply directly on the company website

Apply Now

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