Software engineering on AWS.
SANFELIU builds custom software on AWS for companies in Barcelona and the Vallès that already have systems in place. We build it, launch it and keep it running, with one point of contact from start to finish.
Fifteen minutes, free and with no obligation, with the engineer who would lead the project.
- +50
clients, from industrial distributors and software companies to hotels, restaurants and a rural guesthouse.
- +3,000
hours a year that clients no longer spend doing things by hand: orders, reports and proposals that now happen on their own (an estimate across 2026 projects).
- €0
is what the first conversation costs: fifteen minutes to see whether we’re a fit.
If this sounds familiar, we can solve it.
These are the six things we come across most often in companies that already have systems. Each one has its solution explained, with an example.
- Someone on the team spends hours copying data from one tool to another. We connect the tools so the data flows on its own, without touching what already works. See the solution
- Orders arrive by email or as PDFs and someone types them into the ERP. They go into the ERP on their own, read and checked against the catalog. See the solution
- Four spreadsheets that don’t add up, and nobody trusts the numbers. A single source of truth and the dashboard you look at every Monday. See the solution
- A process no off-the-shelf software handles the way you do. An app built for your process, with the code in your name. See the solution
- Nobody fills in the CRM and emails get lost. Summaries, drafted replies and follow-ups that happen on their own, on top of the CRM you already have. See the solution
- You have your own software and want it to answer questions or do work on its own. We connect AI from the inside, with the same permissions as a user. See the solution
Fifteen minutes, free and with no obligation, with the engineer who would lead the project.
Custom software, built for you.
Not a generic package that makes you change how you work: apps, integrations and automation built for your problem. We build them on AWS, hand them over working and look after them afterwards.
- Management apps and customer portals
- Integrations with SAP Business One, Sage, Odoo, Dynamics or HubSpot
- Automation and AI where it saves hours
- Dashboards on your own data
On AWS: fast, secure, and with the monthly cost clear from the start.
The difference, in six points.
- One point of contact
Whoever designs it builds it and looks after you. No salespeople in between.
- A fixed price before we start
Per feature, never by the hour. You know what you’ll pay.
- You see it before you decide
A prototype with your data before any price.
- Everything is yours
Code, domain and accounts in your name from day one.
- The running cost, up front
We tell you what it will cost every month, cloud included, before we start.
- No lock-in
Month-to-month continuity. If you leave, you take everything with you.
- Three providers who don’t talk
One for the website, one for the ERP and another for whatever breaks.
- Quotes by the hour
That grow every month and never end.
- Deciding on a PDF
A forty-page proposal and nothing working.
- The code belongs to the provider
Switching providers means starting from scratch.
- Bills nobody can explain
Cloud and maintenance costs rise without warning.
- One- or two-year contracts
And a half-finished migration if you want to switch.
Fifteen minutes, free and with no obligation, with the engineer who would lead the project.
How we do it, in four steps.
- 1
We talk
You tell us about the case and we talk it through for fifteen minutes. It’s free, and if we can’t help, we tell you.
- 2
You see it working
A prototype with your data in one to three days. For the whole business, an audit that ends in a phased plan.
- 3
Fixed price and project
A proposal with a fixed price per feature and a real delivery every few weeks.
- 4
Continuity plan
The code in your name, the first month of changes included and a monthly plan sized to the solution.
Fifteen minutes, free and with no obligation, with the engineer who would lead the project.
After delivery, a plan that fits.
Software doesn’t end on the day it’s handed over. We propose a monthly plan based on the solution: whatever it takes to keep it running and improving, with no lock-in.
- Hosting on AWS, monitoring and backups
- Security and bug fixes, always
- Improvements and changes every month
- Direct support from whoever built it
The plan’s price is in the proposal, fixed per month. If you leave, you take everything with you.
Companies we have worked with.
- Food retailer in the Vallès
Malapell
Online business orders, with a catalog and its own management panel.
React · Node · AWS serverless - Industrial supplies distributor
SUMAL
AI training for the whole team and a custom connector so AI can query the online catalog.
Claude · MCP · WooCommerce - Warehouse management software
Binari
Integrations that connect its clients’ ERPs to its warehouse system, with AI-assisted onboarding of new clients.
.NET · ETL · AI
Fifteen minutes, free and with no obligation, with the engineer who would lead the project.
Questions we get asked.
Who builds custom software on AWS in Barcelona?
SANFELIU, a Barcelona consultancy that builds custom software on AWS for companies that already have systems (ERP, CRM, online shop, spreadsheets). It builds business apps and portals, ERP and CRM integrations, automation and dashboards, with AI where it saves hours. It is led by its founder, Joan Sanfeliu Vilarrasa, a software engineer, with collaborators when a project needs them. It works in Barcelona and the Vallès, in person or online, in Catalan, Spanish and English. The first step is a free call. Then comes a prototype with your data before any price (or the audit, for the whole business) and a proposal with a fixed price per feature. After handover, a monthly plan with no minimum term.
Is this for us?
For companies with their own systems and a team that uses them every day: an ERP, a CRM, custom software, a warehouse, and a process that eats up hours. It’s not for anyone who wants to “try AI” without a concrete problem behind it.
How much does it cost?
Each project has a fixed price per feature, which we give you once you’ve seen the prototype or after the audit. Reference prices are public, on the pricing page, VAT not included.
What technology do you use?
TypeScript, Node, React and .NET, on AWS; for AI, Claude and Amazon Bedrock, and MCP to connect it to your systems. We integrate with the ERP and CRM you already use.
What if we want to maintain it ourselves?
You can: the code, the domain and the accounts are yours from day one. If your team takes it over, we can train them.
Where do you work?
In Barcelona and mainly in the Vallès Occidental and Oriental, in person or online. In Catalan, Spanish or English.
Are there grants for these projects?
ACCIÓ-accredited advisor: we know the public funding available to Catalan SMEs and, when a programme that fits your project is open, we’ll tell you.
Facts
- What
- Custom software on AWS (business apps and portals, ERP and CRM integrations, automation, dashboards) and business websites.
- Who
- Joan Sanfeliu Vilarrasa, software engineer and founder of SANFELIU, with collaborators when a project needs them.
- Where
- Barcelona, Vallès Occidental and Vallès Oriental; in person or online; Catalan, Spanish and English.
- How it’s priced
- A fixed price per feature, never by the hour; public reference prices on the pricing page.
- First step
- A free fifteen-minute call; then a prototype before any price, or the audit for the whole business.
- After handover
- Code, domain and accounts in your name, and a monthly plan with no minimum term.
- Technology
- TypeScript, Node, React, .NET and AWS (Lambda, API Gateway, DynamoDB, Amplify, Cognito); Claude, Amazon Bedrock and MCP for AI.
- Own products in production
- taula.ai (restaurant reservations) and Guestproof (review websites for vacation rentals).
- Accreditations
- ACCIÓ-accredited advisor.
Tell us about your case in fifteen minutes.
Book a meeting with the engineer who would lead the project: fifteen minutes, free and with no obligation. If we’re a fit, we tell you how we’d start; if not, who to turn to.
Or email me@joansanfeliu.com
Prefer to write?
Tell us about your case in a few lines and we’ll reply by email.
The engineer who would lead the project will reply to the email you gave us. If you like, book a fifteen-minute call now.