Client. AI-native B2B SaaS Scale-up

We aren't looking for someone to add an LLM API to an existing product.

We're looking for the engineer who can decide how the AI system should actually work in production.

Our client is a fast-growing European B2B software company helping distributed organisations automate high-volume operational and compliance-heavy workflows.

Its platform combines enterprise data, documents, external systems and AI agents to automate work that historically required people to move information between emails, PDFs, legacy applications and back-office systems.

The company has passed the experimental stage. Customers already use AI-powered workflows in production.

The challenge now is reliability and scale.

How do you make agents predictable? How do you measure them? What belongs in the prompt, retrieval layer or deterministic software? When should a model be allowed to take an action? How do you manage permissions, cost, latency and fallbacks?

Those are the problems you'll own.
The role

As Lead Data & AI Engineer,



you'll be the senior technical reference for a small group of Data and AI Engineers.

This is a hands-on technical leadership role, not a people-management job disguised as engineering.

Expect approximately 60-70% hands-on engineering, with the rest spent on architecture, technical direction, mentoring and working with Product, Security and Data.
What you'll own
- Define the architecture of production AI systems built around LLMs, retrieval and agentic workflows.
- Design multi-step agents, tool use, function calling, memory and state-management patterns.
- Decide where deterministic software should replace probabilistic model behaviour.
- Build reliable RAG systems covering ingestion, chunking, embeddings, retrieval, re-ranking and grounding.
- Design model abstraction and routing so the product isn't unnecessarily locked into one provider.
- Introduce systematic AI evaluation: offline datasets, regression suites, production me

📌 Lead Data (Barcelona)
🏢 Value Crew
📍 Barcelona