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

🏢 Welo Global · all Welo Global jobs
📍 Germany
📅 Posted 2026-07-01 · via Himalayas
🏷 Prompt-Engineering,LLM-Fine-tuning,AI-model-evaluation,Linguistic-Engineering,Lead-Prompt-Engineer,Prompt-Engineering-Lead,Prompt-Engineer
Apply on original site ↗

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 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 German and fluent in English.

-
Location: Must be based in Germany.

-
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 4 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. 

Originally posted on Himalayas

← All remote jobs