AI Prompt Engineer Jobs in Brazil

AI Prompt Engineer Jobs in Brazil (Remote)

Design, test, and evaluate prompts and system instructions to improve large language model outputs for production workflows. You will build prompt libraries, run A/B tests, support RLHF-ready artifacts, and partner with engineering teams to ship reliable prompt templates for tools, agents, and RAG use cases.

Key Responsibilities

• Build reusable prompt libraries, templates, and style guides
• Run prompt evaluation, A/B tests, regression suites, and red-teaming
• Define evaluation criteria, QA rubrics, and scoring guidelines
• Create RLHF-ready artifacts (preference comparisons, prompt-response pairs)
• Analyze failure modes (hallucinations, toxicity, policy violations) and iterate
• Document experiments, metrics, and learnings for repeatable improvements
  
  

Required Qualifications

• Production experience in prompt engineering and/or LLM evaluation programs
• Strong writing, structured reasoning, and experiment design skills
• Familiarity with NLP concepts and LLM failure modes
• Ability to write clear annotation guidelines and QA checklists
• Comfort collaborating remotely with cross-functional stakeholders
  
  

Preferred

• RLHF / human-in-the-loop evaluation and preference ranking experience
• RAG prompting, tool calling, or agentic workflow experience
• Python/SQL for analysis, telemetry, and experiment tracking
• Content safety, policy, and adversarial prompting exposure
  
  

Pay

$30–$50 per hour (base).