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

23 hours, 44 minutes ago
Part-time
Senior
Software Development
Welo Global

Welo Global

Welo Global specializes in providing enterprise localization, AI training data, and multilingual content solutions, leveraging a portfolio of specialized global brands to meet diverse customer needs in the AI and language services industry.

Professional Services
Founded 1997

Description

  • Use Automatic Prompt Generation (APG) tools to create baseline prompts for complex parent-child template clusters.
  • Run and oversee Automated Prompt Optimization (APO), reviewing outputs and identifying deadlocks or performance plateaus.
  • Manually draft, test, and refine prompts for complex template architectures, anti-patterns, and edge cases where tooling is insufficient.
  • Monitor shadowbot runs and track disagreements between human and LLM ratings.
  • Evaluate prompt versions against gold data and human-crowd baselines using F1, precision, and recall metrics.
  • Prepare technical launch-readiness justifications and launch certification documentation.

Requirements

  • Native Spanish fluency and fluent English.
  • Must be based in Spain.
  • Bachelor’s, Master’s, or Doctorate in Computer Science, Data Science, Computational Linguistics, HCI, Cognitive Science, or a related analytical field.
  • At least 4 years of experience as a Prompt Engineer.
  • Experience tuning LLMs for strict structured outputs and complex classification tasks.
  • Knowledge of chain-of-thought prompting and few-shot learning.
  • Proficiency in analyzing error patterns and model performance using SQL or other data analytics tools.
  • Ability to quickly learn proprietary tools with minimal supervision.
  • Excellent written and verbal communication skills.
  • Familiarity with Goose API, AI model evaluation, data science, computational linguistics, software engineering, APO systems, or linguistic semantics and logic (preferred).

Interested in this position?

Apply directly on the company website

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