ifsnexusblack - AI Engineer (UK)
Requirements
• Production experience with LLMs — you've shipped systems using model APIs (Anthropic, OpenAI or similar), not just notebooks: system-level prompt design, agent architectures, tool use, RAG. • An evaluation habit. You've built eval pipelines — golden datasets, regression suites, LLM-as-judge where it's honest — and you can tell a good demo from a system that holds up in production. • Strong software fundamentals: Python and/or TypeScript, Git, testing, CI, and the judgement to know when deterministic code beats a model call. • Comfort with ambiguity and pace — small team, broad remit, shipping over ceremony. • Curiosity about the physical world. Our users fix aircraft and keep grids running; you should want to understand their job well enough to build for it. • Retrieval infrastructure at scale (vector stores, hybrid search, reranking). • Fine-tuning or model-adaptation experience where it genuinely beat prompting. • Experience in industrial, field-service or other asset-heavy domains. • Open-source contributions or a portfolio of shipped AI systems.
Responsibilities
• Design and build agentic workflows — multi-step tool use, retrieval, and orchestration — using Claude, LangChain/LangGraph and whatever earns its place next. • Own evaluation. Define what "correct" means for a workflow, build eval harnesses and golden datasets, and hold the line: if it wouldn't convince a 30-year veteran, it doesn't ship. • Take features from prototype to production: observability, tracing (LangSmith), error handling, and reliability that survives week six, not just the demo. • Join customer ride-alongs and site visits — plants, hangars, the field — and bring what you learn straight back into the code. • Work with coding agents daily (Claude Code, Cursor) — they're how we work, not a novelty — and keep making your own job smaller. • Contribute like an owner: PR reviews, design docs, and a culture of writing things down.
Benefits
• We're a small team building AI that has to work the first time, because the people using it are forty feet up a utility pole. AI tooling isn't a side experiment here — it's how we work every day. If you want your code in the hands of people who keep the world running, we'd like to talk. Less talk. More impact.
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