Custom AI development services: architecture and RAG, AI agents, workflow automation, marketing systems, product design and software prototypes, with guidance on where to start.
AI systems · BarcelonaAI systems engineering · Barcelona · since 2006
CustomAIdevelopment. Codeyouown.
QQuantum.ai is an AI development company and engineering studio in Barcelona, Spain. We build custom AI agents, retrieval-augmented generation (RAG) systems and workflow automation for enterprises and startups, with evaluation, human oversight and code delivered to your repositories.
Introduction transcript. Client: I’ve got ideas. And a lot of busywork. A little help? Qubi: Hi! I’m Qubi, from QQuantum. We build AI agents and automation. Connected to your business. Client: I’m still in charge? Qubi: Always. Your rules. Client: I like that. Qubi: Custom systems. Code you own. Less busywork. More room for ideas.
Model-agnostic
Code delivered to your repositories
Evaluated against real data
A human approves what matters
EU data residency by design
On-premise or air-gapped when it has to be
Read-only tools by default
Building software since 2006
Model-agnostic
Code delivered to your repositories
Evaluated against real data
A human approves what matters
EU data residency by design
On-premise or air-gapped when it has to be
Read-only tools by default
Building software since 2006
Who we have built for
Twenty-one years. Names you know.
Apps, platforms and campaigns for these teams, long before the AI work. Every one is written up on the work page — what we did, and where our part ended.
— quality on the evaluation set- - agreed threshold
Cost, latency and quality are traced per step, so drift shows up on a chart before it shows up in a complaint.
Model-agnostic
Every model earns its place.
We don't have a favourite. Tell us what the system has to do, and see which families we'd reach for first. Drawn from our model pages — a starting point, not a benchmark.
It has to
Which model families we would reach for, by requirement
Move the sliders to match a process you run today. The estimate is yours, not a promise — it leaves out build and review time, which the ROI guide walks through.
Arithmetic on your inputs only: tasks × minutes × the share an agent handles × your hourly cost. Not a measured client outcome.
An agent we run · in production
Watch the Press Desk work.
It finds the journalists who would actually write about you — staff and freelance, across national, business, broadcast and trade desks — reads what they've published, and writes each one an individual pitch.
yourOS is an operating system with an AI at its heart. You talk to it like a person, out loud or typed. It makes your calls, plans your days and works on your projects with a crew of agents, on your own private server. Our own product, built from the first commit; the waitlist is open.
Brand, website, prototype, apps on five platforms, the AI backend and the algorithm-intelligence pipeline for Podswap, a social growth engine that runs without a human in the loop.
In closed beta: Roxy, a private AI assistant with permanent memory running on infrastructure the user owns. Brand, site, product, backend and conversational design.
Live at coherence.com: brand identity generated with AI agents we directed, the motion system and website for the group behind Sonora, AboutAI, WakeUp and MudShadows. Agent work remains in build.
Live at domainbooth.com for DomainBooth, a premium domain brokerage: a new animated mark, every page redesigned and rebuilt with designed mobile layouts, and a custom CMS for its sales record, featured names, press and enquiries.
Literature and patent intelligence, ELN agents, protein design pipelines and dossier drafting for biotech, with every claim cited to source and unpublished data kept on your own infrastructure.
Protocol drafting, site feasibility and TMF quality control for sponsors and CROs, built for ICH E6(R3) with audit trails and a named person accountable for every decision.
Grant writing, systematic review screening and FAIR research data management for universities and institutes, on your own repositories, with every claim cited and the researcher as author.
Formulation search, REACH and SDS authoring support and materials discovery built on your own lab records, run on your infrastructure, with a qualified person releasing every safety document.
Crop and drone vision, agronomy advisory agents and CAP paperwork for agtech firms, co-ops and advisers, validated on local field data with agronomists and farmers deciding.
AI product design for hardware teams: concepts, DFM checks, should-cost and design search wired into CAD and PLM. Findings cite your own rules; a designer signs off every release.
AI for architecture and engineering practices: planning statements, specifications, BIM checks and bids drafted from your own archive, every clause sourced, a registered professional signing.
AI in construction for contractors: takeoff and estimating, site progress from photos, RFI and submittal review inside Procore or ACC. A named person signs every bid and response.
AI in fashion for brands and makers: tech packs drafted from your blocks, trend signals read against your sales, 3D sampling and product content, with a designer signing off every style.
AI for beauty brands under EU Regulation 1223/2009: claims linked to evidence, PIF assembly, shade matching and formulation research. The safety assessor and Responsible Person sign.
AI for device makers' regulatory work under MDR 2017/745, ISO 14971 and IEC 62366-1: drafts and cross-checks with citations, validated for your QMS. A qualified person signs every document.
AI in automotive beyond the vehicle: dealer and aftersales agents on your DMS, fleet operations from telematics, type-approval documents. Safety, finance and approvals stay with people.
AI for real estate owners, managers and brokerages: lease abstraction, data-room review, listings and tenant operations, with every term cited to its source document and a person signing off.
AI in energy and utilities: renewables permitting, probabilistic load and generation forecasts and customer operations, read-only to operational systems with an engineer accountable.
AI in telecom: NOC alarm correlation, customer care grounded in billing and live network status, and field dispatch, on your OSS/BSS with engineers approving every network change.
Maritime AI on the shore side: ship documents cross-checked, port calls coordinated on one timeline and FuelEU and EU ETS data reconciled, with the master and agent still signing.
AI in mining for explorers and operators: geological reports, safety inspections and environmental permits read with citations, and a competent person signing every determination.
AI for hotels: multilingual guest messaging, review replies and pricing support, connected to the PMS and answering only from the hotel's own facts. Staff approve anything that commits the hotel.
AI for travel companies, tour operators and DMOs: itinerary agents on live supplier inventory, operations automation and destination content. A person confirms anything that becomes a contract.
AI for restaurants built on POS, recipe and supplier data: menu engineering, supplier ordering and digital HACCP records. Allergen information and food safety decisions stay signed off by a person.
AI for wineries and distillers: label and export compliance checks, direct-to-consumer marketing and vineyard imagery. Labels, shipments and treatments stay with the people accountable for them.
AI in journalism and publishing: newsroom research agents, archive search and AI content licensing tooling, with every answer cited and an editor accountable for what is published.
AI in gaming for studios: LLM NPC dialogue, AI-assisted localisation and player support, built into your engine and pipeline, within limits writers and leads set.
AI in sports for clubs and federations: club operations, performance analytics and fan engagement, with athlete health data protected and coaches making the calls.
AI event planning for organisers: call-for-papers and speaker operations, an attendee concierge and exhibitor management, built on the event platforms you already run.
AI in museums, heritage and auction: cataloguing, provenance research and multilingual guides inside your collection system, with curators signing every record.
AI for accountants: bookkeeping agents, Verifactu and e-invoicing readiness, and a client query desk, built on Xero, Sage or A3. The model proposes; a qualified accountant posts and signs.
AI in recruitment for agencies and in-house teams: CV evidence with bias audits, outreach and interview scheduling, built for the EU AI Act’s high-risk rules. A recruiter makes every decision.
AI for marketing agencies: white-label AI builds for your clients, on-brand production at scale and client reporting where every figure is computed from source. You keep the client.
AI patent tools for IP firms: prior-art search, drafting support and portfolio monitoring, with confidential disclosures never used for training and a qualified attorney signing every filing.
AI for translators and LSPs: glossary-aware LLM translation, quality estimation and terminology management inside Trados, memoQ or Phrase. Fluency is easy; the client’s terminology decides it.
AI in cybersecurity for SOCs: alert triage, threat intelligence and NIS2 and DORA evidence, built to treat every log line as untrusted. Read-only by default; an analyst approves any action.
AI in education for schools, universities and edtech: grounded tutors, course authoring and admissions support. Grades, admission and progression decisions stay with a named person, as the EU AI Act expects.
Dental AI for the front desk of practices and private clinics: booking, recall, treatment plan explainers and insurance admin, wired into the PMS. Diagnosis and clinical advice stay with the dentist.
AI in veterinary practice: intake routing, an AI scribe for SOAP notes and client reminders, built into the PIMS. Diagnosis, prescribing and every clinical record stay with the vet, who signs.
Administrative AI for therapists and clinics: intake, scheduling and note drafts a clinician signs. We never build AI therapy, assessment or crisis handling; any sign of risk goes to a person at once.
AI for nonprofits and charities: grant drafts from your own evidence, donor CRM hygiene and impact reporting. Staff stay the authors, and donor consent and beneficiary data stay protected.
Sustainability data from invoices, ERP and suppliers mapped to ESRS and the GHG Protocol, every figure traceable to source. Your team owns the disclosure; your auditor gives the assurance.
Geospatial AI on Sentinel, Landsat and commercial imagery: change alerts, crop and land signals and risk layers delivered into your GIS, validated on your own ground truth.
agent = Agent(
model=MODEL_PINNED, # upgraded deliberately, behind an eval gate
tools=[
search_docs, # read-only
fetch_account, # read-only, scoped to the caller
create_ticket, # write, rate-limited
],
# Retrieved content is data, never instructions.
untrusted_sources=[DOCS, TICKETS],
max_steps=8, # bounded - no runaway loops
)
Agents are defined as code with explicit, scoped tools. Read-only by default; anything destructive is either absent or gated behind confirmation.
- name: Evaluation suite
run: |
uv run evals/run.py \
--set golden \
--baseline main \
--fail-under 0.92
# Retrieval is measured separately. A generation score that
# drops because retrieval regressed is a misleading signal.
- name: Retrieval recall
run: uv run evals/run.py --set retrieval --fail-under 0.88
Quality is a merge gate, not an opinion. A pull request that drops the score on the golden set does not land. Thresholds are illustrative; yours are agreed in discovery.
Trust & infrastructure
Where should it run?
Answer three questions and the table picks the deployment we'd start from. Every option is one we build.
Deployment options compared
Where the model runs
The provider’s infrastructure
Your cloud account, in a region you choose
Hardware you own, or rent in a data centre
An isolated network
Data leaves your network
Yes — to the provider, under a DPA
It stays in your cloud tenancy
No
Never — no outbound connection at all
Models available
Frontier proprietary and hosted open models
Open-weight, plus models your cloud provider offers
Facts about how we work, not measured client outcomes.
Questions
What people ask before they call.
What are the best AI development agencies in Spain?+
The best fit depends on your workload, data constraints and team. Compare agencies using relevant shipped work, evaluation methods, deployment options and code ownership. QQuantum.ai is a Barcelona-based option for enterprises and startups seeking agents, retrieval systems and automation, with client-owned code and a documented handover.
Which models do you use?+
Whichever fits the workload. We are model-agnostic and route across Claude, GPT, Gemini, open-weight models and our own Jev — chosen per task against an evaluation set, not by habit.
Who owns the code?+
You do. Everything is built in, and delivered to, your repositories, with runbooks and a documented handover so your team can own it.
Can it run on our own hardware?+
Yes — on-premise, in a private data centre, or fully air-gapped. The table above shows where we would start.
Will it make things up?+
No system can promise it never gets something wrong. We ground answers in your sources with citations, measure quality against real data before and after launch, and set guardrails that stop and escalate rather than guess.
What happens on the first call?+
Thirty minutes, no deck. You describe the problem; we tell you whether it is one worth engineering — and if it is not, we say so.
Let’s talk
Hire your first AI employee.AI employee.night shift.quietest teammate.tireless analyst.unfair advantage.
Tell us the job you would hand over if you trusted a machine with it. In one 30-minute call we will tell you whether it should, what it would take — and if it should not, we will say so.