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 eva...