Senior AI Engineer - LLMs & Agentic Systems

Pacific Life; Greater London; Hybrid; GBP 110,000 - 150,000; Full time

Benefits offered by this job

Healthcare

Parental leave

Hybrid work model

Wellness programs

Job summary

UnderwriteMe, a leading Insurtech platform, seeks a Senior Applied AI Engineer to design, build, and deploy production-grade LLM-based and agentic systems. You will own evaluation harnesses, shape multi-step workflows with guardrails, and collaborate with product teams to align ML capabilities with underwriting constraints.

We expect 6+ years in ML/AI, hands-on experience with OpenAI and Anthropic APIs, and strong Python/FastAPI skills.

Qualifications

• 6+ years in ML/AI, with NLP/LLMs/agentic systems expertise.
• Hands-on with OpenAI and Anthropic models/APIs.
• Experience with Langfuse or equivalent observability tooling.
• Strong Python, FastAPI, Postgres, and async architectures.

Responsibilities

• Design, build, and deploy production LLM and agentic systems.
• Own evaluation harnesses to measure model/prompts impact.
• Architect multi-step tool-using pipelines with guardrails and human-in-the-loop review.
• Collaborate with product and underwriting SMEs to align ML with domain constraints.
• Scale systems from prototype to production, optimizing latency and cost.

Skills

NLP

LLMs/SLMs

Agentic systems

Evaluation harnesses

Prompt engineering

Python

FastAPI

PostgreSQL

Docker

Kubernetes

PyTorch

TensorFlow

Cloud platforms

Tools

OpenAI APIs

Anthropic models/APIs

LiteLLM

vLLM

Langfuse

Claude Code/Codex

Job description

UnderwriteMe, a leading Insurtech platform, seeks a Senior Applied AI Engineer to design, build, and deploy production-grade LLM-based and agentic systems. You will own evaluation harnesses, shape multi-step workflows with guardrails, and collaborate with product teams to align ML capabilities with underwriting constraints.

We expect 6+ years in ML/AI, hands-on experience with OpenAI and Anthropic APIs, and strong Python/FastAPI skills.