AI Prompt Engineer Jobs in India (Remote, Full-Time) — Rex.zone

Design, test, and optimize prompts and evaluation workflows that improve LLM performance in real production pipelines. You will collaborate with engineers and researchers to build prompt libraries, run A/B tests, define rubrics, and improve reliability, groundedness, and safety across assistants, copilots, agents, and RAG systems.

Key Responsibilities

Own prompt lifecycle management: writing, debugging, versioning, and prompt library maintenance
Design prompt evaluation plans using rubrics for accuracy, completeness, instruction following, tone, and policy compliance
Create RLHF-style preference/ranking data with clear rationales to support instruction tuning workflows
Translate product requirements into system prompts, developer prompts, and user prompt patterns
Improve grounding and reduce hallucinations using RAG strategies and citation/traceability constraints
Create annotation guidelines and support QA evaluation (edge cases, escalation paths, consistency checks)
Monitor quality metrics (pass rate, inter-annotator agreement, regression failures) across releases
Support safety alignment: red-teaming prompts, jailbreak resistance, and sensitive data leakage prevention

Required Qualifications

3+ years in software engineering, ML/NLP workflows, or applied LLM prompt engineering
Strong structured writing for precise instructions and multi-step constraints
Experience with LLM evaluation: rubrics, pairwise ranking, golden sets, adversarial testing
Familiarity with RLHF concepts and human feedback loops
Working knowledge of Python and experimentation tooling (notebooks, scripts, JSON, APIs)

Preferred Qualifications

Experience with RAG pipelines, vector search, embeddings evaluation, and grounded answer validation
Knowledge of content safety labeling, policy taxonomy, and prompt-based guardrails
Experience with LLM observability/eval tooling (regression suites, eval harnesses)

Compensation

Competitive hourly rate: $30–$50/hr

FAQs

What does an AI prompt engineer do They design and optimize prompts, build templates/system instructions, run evaluations and A/B tests, and create feedback data to improve reliability and safety.
Is this role remote Yes, this posting is marked Remote and designed for distributed collaboration while targeting candidates based in India.

AI Prompt Engineer (India)