Lead AI Engineer | Python | LLMs | Agentic AI | Hybrid (Barcelona)

Velocity Tech has partnered with an innovative, venture‑backed AI startup that is transforming a highly regulated industry through the application of cutting‑edge artificial intelligence.

We’re looking for a

Lead AI Engineer

to take ownership of the company’s AI strategy while remaining hands‑on in the design, development, and deployment of production‑grade AI systems. This is an opportunity to join a small, high‑calibre engineering team where you’ll have a direct influence on both the technical direction and future of the product.

What You’ll Be Doing

Lead the design and development of production‑ready AI systems built around LLMs and agentic workflows.

Build intelligent multi‑step agent frameworks capable of solving complex business problems.

Design robust evaluation, testing and feedback loops to continually improve AI performance.

Develop reliable, scalable AI applications with a focus on observability, latency, cost optimisation and system resilience.





Work closely with founders and senior leadership to define the company’s AI strategy and technical roadmap.

Transform complex real‑world processes into reliable, auditable AI‑driven solutions.

Research, evaluate and implement the latest advancements across AI and machine learning technologies.

What We’re Looking For

Strong commercial experience building backend applications in

Python .

Hands‑on experience building

agentic AI systems , multi‑agent workflows or orchestration frameworks.

Experience working with modern AI frameworks such as

LangGraph

or similar.

Good understanding of model evaluation, observability and AI system reliability.

Solid machine learning and NLP fundamentals.

Experience influencing technical direction and making architectural decisions around AI products.

Startup or scale‑up experience is highly desirable.

Python

FastAPI

LangGraph

Vector Databases

Docker

Why Join?

Join a well‑funded AI startup b

📌 Lead Ai Engineer (Madrid)
🏢 Velocity Tech
📍 Madrid