Draft
What production asks of an AI system
Coming soon
Adrián Sacristán Ibáñez · London
Here I write about technology, business and management.
Currently Tech Lead for the UK Government.

Essays on technology, business, and management. The first three are still drafts.
Draft
Coming soon
Draft
Coming soon
Draft
Coming soon
Products in motion, plus one open-source project that already has a life of its own.
Private beta
Voice mock interviews for hospitality-tech commercial roles, scored against a six-competency rubric.
Pre-launch
A multi-agent receptionist for UK private clinics: calls, messages, bookings, and a handoff to staff.
MVP
Meals planned from the pantry you already have, and the shopping list that follows.
github.com/asacristani
FastAPI Rocket Boilerplate
Open source
A community FastAPI starter: infrastructure, ORM, authentication, and an admin dashboard.


A pleasure working on ListingOS, where agents and human-in-the-loop processes helped the legal team move faster and uncover more in less time.


A key role in designing and delivering production AI, including ListingOS. Deep expertise in LLMs, RAG pipelines, and agentic architectures, and a pragmatic approach to reliable, secure systems.


Thoughtful, reliable, and highly capable, with strong technical judgment and clear communication. He combines ownership with humility and moves the work forward in a practical way.


A motivating leader at British Airways, eager to learn the product end to end, with strong technical skills and a supportive, caring way with coworkers.


An exceptional technical lead, from React and FastAPI to data engineering with Dagster, whose advice is grounded, constructive, and forward-thinking.

Together we completed one of the most successful features in the Playbrush app. Skilled, with a broad range of abilities and a lot of passion for the craft.

Commitment, a rapid learning curve, and strong teamwork. I recommend him, and I would be open to working with him again.

Incredibly helpful and supportive in critical moments, quick and optimistic, with a knack for making challenging tasks seem easy.

A born leader, with unmatched problem-solving skills and exceptional charisma. We built infrastructure and architecture in Python using FastAPI.

My tech lead. His communication was a compass for the team, and he trusted people to organise their time around the work.

A natural leader who shares his knowledge and helps colleagues. Creative, dedicated, and hardworking.
A gift for marrying technical expertise with project experience, at home in a technical role (Python) or a project role (BA/PM).
About a system, a team, or something I have written. Speaking and advisory sit alongside the essays, not in front of them.