Founding AI Platform Engineer — Real-Time Underwriting

Nexa; England; On-site; GBP 90,000 - 140,000; Full time

Job summary

Nexa is a well-backed early-stage insurtech building an AI platform to redefine underwriting decisions in a global market. This founding engineering team focuses on TypeScript, React, Python, and AWS/Azure-based infrastructure to deliver live customer value.

You will own end-to-end features, design retrieval and evaluation pipelines, and collaborate with customers to rapidly validate improvements in real time.

Qualifications

• 5+ years engineering in product-focused environments.
• Proven track record taking features from idea to launch.
• Experience building with LLMs including RAG, semantic search and vector stores.
• Hands-on with TypeScript, React, Node and Python.
• Comfortable deploying to cloud platforms (AWS, GCP or Azure).

Responsibilities

• Build agentic workflows that extract, reason and generate underwriting insights.
• Design and ship LLM powered features end to end.
• Build and optimise retrieval pipelines, search indices and evaluation frameworks.
• Develop interfaces, APIs and infrastructure for AI-driven underwriting products.
• Work closely with the founding team and users to deliver real value fast.

Skills

5+ years engineering

LLMs, RAG, semantic search

TypeScript

React

Node.js

Python

AWS / GCP / Azure

Vector stores

ownership & feedback

Tools

AWS

GCP

Azure

Job description

Nexa is a well-backed early-stage insurtech building an AI platform to redefine underwriting decisions in a global market. This founding engineering team focuses on TypeScript, React, Python, and AWS/Azure-based infrastructure to deliver live customer value.

You will own end-to-end features, design retrieval and evaluation pipelines, and collaborate with customers to rapidly validate improvements in real time.