AI Engineer - Remote (Barcelona) €100,000

About the Role

We are looking for a hands on AI Engineer to own and evolve the core “brain” service that drives a cutting edge AI product. This role spans architecture, development, optimization, and production operations of real time, multi agent LLM systems.

Role Overview

As an AI Engineer, you will design, build, and operate low latency, real time text and voice agent systems. You will be responsible for multi agent orchestration, advanced reasoning approaches, RAG engineering, and evaluation driven development to ensure production grade quality and performance.

Key Responsibilities

• Design, build, and operate low latency real time text and voice agent systems
• Implement multi agent orchestration patterns (planner-executor-critic, routing, shared memory)
• Apply advanced reasoning methods (ReAct, Chain of Thought, Tree /Graph of Thoughts where appropriate)
• Lead RAG engineering with strong grounding, evaluation, and observability
• Drive evaluation based development with monitoring, tracing, and CI/CD gating
• Ship production grade Python services using FastAPI under strict latency and quality requirements

Minimum Qualifications

• 5+ years of experience in ML or backend engineering in production environments
• Deep expertise in Python, FastAPI, asyncio, and production observability
• Experience with low latency text and/or voice systems (LiveKit, Pipecat, WebRTC, or similar)
• Hands on experience with LLM systems, agent patterns, and evaluation driven workflows
• Prior startup experience

Tech Stack Highlights

Python, FastAPI, asyncio, Redis, Postgres, vector databases, WebRTC/LiveKit, SIP gateways, Docker, Terraform, Kubernetes, OpenTelemetry, DeepEval, GCP

What We Offer

• Work on state of the art real time AI agent technology in healthtech
• Highly collaborative, senior technical team
• Fully remote role based in Barcelona
• Fun off sites and strong developer ergonomics

If you are interested please email your CV to for immediate consideration.