Project Lion - Prompt Engineer - United States (Remote, Part-Time)

TLDR

Leverage advanced prompt engineering techniques for LLM optimization while managing complex templates and ensuring high-quality output measurements.

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 registered, generated, and tracked.   

  • Run prompt versions against established gold data to continuously measure autorater quality against the human crowd baseline, calculating accuracy metrics such as F1 scores, precision, and recall.   

  • Draft technical launch readiness justifications (Launch Certification Documentation) for final. 

Requirement: 
  • Language Skills: Native fluency in English. 

  • Location: Must be based in United States.

  • Education: Bachelor’s, Master’s, or Doctorate degree in Computer Science, Data Science, Computational Linguistics, Human-Computer Interaction (HCI), Cognitive Science, or a related analytical field.  

  • Prompt Engineering & AI Expertise: At least 2 years' experience as Prompt Engineer. Proven experience tuning Large Language Models (LLMs) for strict, structured outputs, complex classification tasks, and familiarity with chain-of-thought and few-shot learning. 

  • Data Analysis: Strong proficiency in identifying error patterns, analyzing model performance, and using SQL or other data analytics tools.  

  • Technical Agility: Ability to quickly learn and master proprietary tools with minimal supervision. 

  • Communication: Excellent verbal and written communication skills. 

Optional / Preferred Skills:  
  • Familiarity with enterprise-grade LLM interfaces like the Goose API.  

  • Experience in AI model evaluation, data science, computational linguistics, or software engineering. 

  • Hands-on experience with Automated Prompt Optimization (APO) systems or tuning workflows. 

  • Linguistic expertise, including an understanding of semantics and logic. 

Federal Law Compliance   
   
In compliance with federal law, all persons hired will be required to:   
 
- Verify identity and eligibility to work in the United States; and   
- Complete a required employment eligibility verification form. 
 
Please note that in order to verify work authorization as is required by Federal law (I-9 process), all new employees must complete a live video verification with their selected IDs and provide photos of these selected IDs within their first 3 days of employment.
 
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Welocalize is a global leader in localization and data solutions, dedicated to helping brands effectively engage with international audiences through multilingual content transformation. With a vast network of over 500,000 contributors, we deliver high-quality, ethical data that powers advanced AI systems and supports diverse client projects across various industries.

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