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Gen-AI Prompt & Context Engineer; Remote | Outside IR35

Remote / Online - Candidates ideally in
Merthyr Tydfil, Merthyr Tydfil County, CF47, Wales, UK
Listing for: 9NEXUS
Contract, Remote/Work from Home position
Listed on 2026-02-28
Job specializations:
  • IT/Tech
    AI Engineer, Machine Learning/ ML Engineer, Data Scientist
Salary/Wage Range or Industry Benchmark: 400 GBP Daily GBP 400.00 DAY
Job Description & How to Apply Below
Position: Gen-AI Prompt & Context Engineer(Contract Remote | Outside IR35 | £400/day |

We are seeking a Gen-AI Prompt & Context Engineer to design and operate end-to-end LLM workflows, including prompt strategy, retrieval pipelines, multi-agent orchestration, and production observability. The role involves building scalable AI automation using Python, CrewAI multi-agent systems, and n8n workflows while ensuring safety, governance, and performance.

Key Responsibilities
  • Design and optimize prompts, templates, and prompt libraries for consistent AI outputs
  • Build context pipelines (RAG, embeddings, chunking, hybrid search) and maintain knowledge freshness
  • Develop and orchestrate multi-agent workflows using CrewAI and integrate external tools/APIs
  • Create automated LLM workflows in n8n with retries, approvals, and monitoring
  • Build Python services, evaluation harnesses, and metrics pipelines for LLM performance
  • Implement guardrails, RBAC, audit trails, and compliance-aligned AI governance
  • Monitor production reliability with tracing, dashboards, alerts, and fallback strategies
Required Skills
  • Strong Python engineering and API development experience
  • Hands-on experience with prompt engineering, RAG pipelines, and LLM orchestration
  • Experience with multi-agent frameworks (e.g., CrewAI) and workflow tools like n8n
  • Familiarity with vector databases, embeddings, and hybrid retrieval approaches
  • Knowledge of observability, evaluation methods, and AI safety controls
  • Strong problem-solving skills and ability to work cross-functionally
Nice to Have
  • Experience with Open Telemetry, Grafana, or similar monitoring tools
  • Exposure to enterprise AI governance, privacy, or regulated environments
  • Experience optimizing LLM cost, latency, and accuracy in production systems
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