Senior AI Engineer - Remote EU, Build Multi-Agent LLMs

Cubiq Recruitment; Remote; GBP 60,000 - 79,000; Full time

Job summary

A leading tech recruitment firm is seeking a Senior/Staff AI Engineer to design and implement innovative multi-agent LLM systems for a venture-backed startup. The role offers real ownership, allowing the engineer to influence core AI architecture. The ideal candidate will have expert skills in Python and FastAPI, and a startup mindset. The position is remote but available for co-working in London or Barcelona, presenting a fast-paced environment with immediate impact from day one.

Qualifications

• Proven ability to build and ship agentic or multi-agent frameworks into production.
• Practical experience with LangChain, Autogen, or custom orchestration layers.
• Obsessive about latency, optimise for concurrency.

Responsibilities

• Design, implement, and productionise multi-agent LLM systems.
• Develop FastAPI-based microservices optimised for low latency.
• Integrate real-time voice interfaces into intelligent conversational flows.

Skills

Expert Python

FastAPI

asyncio

Multi-agent frameworks

Startup mindset

Tools

LangChain

Autogen

RAG pipelines

Job description

A leading tech recruitment firm is seeking a Senior/Staff AI Engineer to design and implement innovative multi-agent LLM systems for a venture-backed startup. The role offers real ownership, allowing the engineer to influence core AI architecture. The ideal candidate will have expert skills in Python and FastAPI, and a startup mindset. The position is remote but available for co-working in London or Barcelona, presenting a fast-paced environment with immediate impact from day one.