Principal AI Full-Stack Engineer - Production LLM & Infra

Peak3; Madrid; Presencial; EUR 90.000 - 130.000; Jornada completa

Descripción de la vacante

Peak3 in Madrid is seeking a Principal AI Full-Stack Engineer to own the design, build, and operation of agentic AI systems powering our core insurance products. You will architect LLM inference chains, build production AI infrastructure, and ship full-stack features from model to UI.

You should thrive in a fast-paced, collaborative environment, have hands-on depth across backend, frontend, and ML tooling, and enjoy turning difficult problems into scalable, auditable solutions for insurers and

Formación

• Proven production-ready LLM/AI system experience.
• Fluent in Python or TypeScript with full-stack capability.
• Hands-on LLM engineering depth: RAG, function/tool calling, agent frameworks.

Responsabilidades

• Build agentic AI applications end-to-end — RAG pipelines, multi-agent orchestration, tool calling, workflows.
• Design and optimize LLM inference chains: prompts, outputs, evals, and observability.
• Stand up production AI infrastructure: vector databases, semantic retrieval, model gateways, inference optimization.
• Own full-stack delivery — frontend (React/Next.js), backend (Python/TypeScript), cloud-native deployment (K8s/Serverless).
• Partner with actuarial, underwriting, and claims to build trustworthy, auditable AI systems.

Conocimientos

LLM Engineering

Python

TypeScript

Frontend Development

Herramientas

LangGraph

LlamaIndex

Kubernetes

Postgres

Descripción del empleo

Peak3 in Madrid is seeking a Principal AI Full-Stack Engineer to own the design, build, and operation of agentic AI systems powering our core insurance products. You will architect LLM inference chains, build production AI infrastructure, and ship full-stack features from model to UI.

You should thrive in a fast-paced, collaborative environment, have hands-on depth across backend, frontend, and ML tooling, and enjoy turning difficult problems into scalable, auditable solutions for insurers and