Custom software and AI for companies
From zero to one.
Custom software and AI for mid-sized and large companies. Projects of several weeks or months, from the first call to production, with a senior engineering team.
- Automation
- Documents
- Integrations
- Dashboards
- Backend
- Reply within 24h
00Manifesto
Most agencies sell hours. We deliver systems that work. Senior engineers, frontier AI and a direct line between your company and the people building for it.
01Services
What we build.
Five areas under one roof. Pick one, or tell us the problem and we will tell you where to start.
Processes that today depend on copying, checking and forwarding by hand, handled by workflows and AI agents wired into your systems. Where it matters, a person decides.
What you get
Workflows in production, wired into the tools you already use. Logs you can read, a hand-off to a person when confidence is low, and every prompt and line of code in your repository.
Typical timeline
2 to 6 weeks
Stack
- Python
- Claude
- MCP
- n8n
- FastAPI
Start this project01/05
Invoices, orders, contracts and other PDFs turned into structured, verified data. Every value is checked against the source. If we're not sure, the field stays empty. We never invent.
What you get
An extraction pipeline that outputs validated fields with a page and line reference for every value, plus a review queue for anything that did not pass the confidence gate.
Typical timeline
4 to 8 weeks
Stack
- Python
- LLMs
- PostgreSQL
Start this project02/05
Your ERP, CRM and other systems connected, so data flows without being typed in twice. APIs, ingestion and batch or real-time data pipelines.
What you get
Integrations and pipelines that run on schedule or in real time, with monitoring, retries and alerts. Documented so your team can run them without us.
Typical timeline
4 to 12 weeks
Stack
- Kafka
- NiFi
- Airflow
- PostgreSQL
- Python
Start this project03/05
Apache Superset specialists. Dashboards, metrics, permissions and embedded analytics on data you can trust.
What you get
Superset dashboards on top of clean data models, with role-based access and metric definitions that mean the same thing to everyone who reads them.
Typical timeline
From 3 weeks
Stack
- Apache Superset
- SQL
- PostgreSQL
Start this project04/05
APIs, services and internal applications built for your business. Python and FastAPI behind, with Next.js and React on the front when it needs an interface.
What you get
A production backend with auth, documented APIs, tests and CI, plus the application or admin your team needs, deployed on infrastructure you own. Built to be extended, not rewritten.
Typical timeline
6 to 14 weeks
Stack
- Python
- FastAPI
- Next.js
- React
- TypeScript
Start this project05/05
02AI-native
Senior judgement. AI speed.
We build with Claude Code and other frontier AI tools, directed and reviewed line by line by engineers who have shipped critical systems. You get the speed of AI without the bugs nobody checked.
- 01Every line reviewed by a human
- 02Tests before every merge
- 03Weekly demos, no black boxes
- spec triage-router.md
- scope, inputs, edge cases[ approved ]
- agent implement --spec triage-router.md
- + app/triage/router.py
- + app/triage/rules.py
- + tests/test_router.py
- pytest
- tests/test_router.py[ passed ]
- review --human
- every line read[ approved ]
- git merge main
- shipped
03Experience
Experience that travels.
Systems delivered for the public sector, healthcare, manufacturing, industry, law and SaaS. Built from Vigo for clients across Europe, the Middle East and the US, in English and Spanish.
Markets
United States · Ireland · Netherlands · Germany · Switzerland · Madrid · Dubai, UAE
Sectors
- 01Public sector,
- 02Healthcare,
- 03Manufacturing,
- 04Industrial,
- 05Legal,
- 06B2B SaaS,
- 07E-commerce.
- Headquarters
- Vigo, Spain
- Markets
- Europe, Middle East and US
- Languages
- English and Spanish
- Vigo, now
- --:--
- Your time
- --:--
- Overlap
- --
04Calculator
What is manual work costing you?
Pick one repetitive process and put in your own numbers. The estimate uses nothing else.
The process
Salary plus overheads
Your estimate. We check it with you on the first call.
€16,560 a year in hours you could get back
- Hours a year on this process
- 1,104
- Hours back a year
- 552
- Full-time people
- 0.3
An estimate from your numbers only, over 46 working weeks a year. It is not a quote or a promise.
05Engagement
Three ways to work with us.
From a single project to a team that works as part of yours. Every model starts with the same free call.
- 01Fixed priceProjectA defined scope, delivered end to end. Fixed quote in 48 hours, weekly demos, launch and handover.Best forNew products, platforms, integrations and AI systems.Talk to us
- 02MonthlyDedicated teamSenior engineers who join your sprints, your repository and your tools, for as long as you need them.Best forCompanies that need to move faster without hiring.Talk to us
- 03Monthly retainerOngoingWe keep what we build running and improving: monitoring, support and new features every month.Best forSystems your business cannot afford to stop.Talk to us
06Process
Four steps. No surprises.
01
Call
20 minutes, free. We listen and tell you honestly if we're the right fit.
02
Proposal
Scope, timeline and a fixed quote within 48 hours.
03
Build
Weekly sprints and weekly demos. You see progress every week.
04
Launch and support
We ship, monitor and keep improving.
07Why Zero One
The difference, line by line.
Senior engineers on every project
- Zero One
- Yes
- Typical agency
- No
- Freelance marketplace
- No
Direct line to the people building
- Zero One
- Yes
- Typical agency
- No
- Freelance marketplace
- Yes
AI-native delivery
- Zero One
- Yes
- Typical agency
- No
- Freelance marketplace
- No
Fixed quote before we start
- Zero One
- Yes
- Typical agency
- No
- Freelance marketplace
- No
You own 100% of the code
- Zero One
- Yes
- Typical agency
- No
- Freelance marketplace
- Yes
Weekly demos
- Zero One
- Yes
- Typical agency
- No
- Freelance marketplace
- No
100%
You own 100% of the code and IP
NDA
NDA before the first call if you need it
48h
Fixed quote in 48h
1/wk
Weekly demos
24h
Reply within 24 hours
08Team
One senior team. Every discipline.
Every project gets a senior lead, the specialists it needs and AI agents working under human review. The team grows with the scope, never with the invoice.
- 01Senior engineers only
- 02One accountable lead per project
- 03A direct line to the people building
Practices04
- 01Data engineeringIntegrations, pipelines and data platforms.
- 02AI engineeringAutomation, agents and document data extraction.
- 03Product engineeringBackends, APIs and custom applications.
- 04Analytics and BIDashboards, metrics and embedded analytics.
Headquartered in Vigo, Spain. Working with clients across Europe, the Middle East and the US.
09Start a project
Tell us what you need.
Tell us about the project. It takes two minutes and we reply within 24 hours.
10FAQ
Questions, answered.
01Who do you work with?
Mid-sized and large companies that need custom software or AI: automating processes, extracting data from documents, connecting systems, reliable dashboards or a backend of their own. Projects run for several weeks or months.
02How much does a project cost?
It depends on scope, so we don't publish prices. Every project is quoted after the first call: within 48 hours you get the scope, the timeline and a fixed quote.
03How fast can you start?
As soon as the proposal is agreed. We confirm the exact start date on the first call, and we only commit to dates we can keep.
04Who actually writes the code?
Senior engineers from our team, with AI coding agents working under their direct review. Every project has one accountable lead, and you always know who is working on your product.
05How do you use AI, and is it safe?
We use Claude Code and other frontier tools to write code, tests and documentation faster. Nothing is merged until a senior engineer has read and approved it. We agree with you upfront which tools can touch your code and data, and we can sign an NDA before the first call.
06Do I own the code?
Yes. 100% of the code and IP is yours, in your own repository, with no licence fees and no lock-in.
07Can you work with my existing team?
Yes. We can work inside your repository, your sprints and your tools, or own a clear part of the system and hand it over with documentation.
08What if I don't know exactly what I need?
That's what the first call is for. Tell us the problem and we'll suggest the smallest thing worth building first.
09Can you take on large projects?
Yes. The team scales with the scope, and one senior lead stays accountable from the first call to production. Bigger projects are split into phases, each with its own quote and demos.
10Do you work with companies outside Spain?
Yes. We work in English and Spanish with clients across Europe, the Middle East and the US. We're in Vigo (CET), and our afternoons overlap with US mornings.