Samuel Quintero, web developer in Madrid
I write enterprise software from nine to six. DarosCode is where I apply that to business websites.

- Madrid
- Where I work and invoice
- Avanzadi
- Full-time, on staff
- 5
- Ecosystems in production
How I got here
My name is Samuel Quintero and I work as a software developer at Avanzadi Innovación, in Madrid. DarosCode is not an agency you reach through a form: it is me, and what you hire is what I write.
I started on the design and frontend side and worked my way down from there: first to the browser, then to the server. Two years of training and the rest inside a development company, shipping onto systems that were already in production with people using them every day.
That teaches something you do not learn building one-off sites: what it costs to maintain a decision that was made in a hurry. It is why there are no visual builders or bought templates here, and why every decision on this site has a number behind it.
What I work with
- Every day
- HTMLModern CSSJavaScriptReactNext.js
- In production
- Node.jsNest.jsPHPWordPressAstro
- Shipped with
- .NETJava with Spring Boot
They are on the list because knowing when to rule a technology out is worth more than knowing how to use it.
What I do not do
- Native mobile apps. If you genuinely need iOS and Android, I am not your profile.
- Link building. I do the technical and structural side; buying links, no.
- The cheapest site on the market. I do not compete on price, and the pricing page says so without small print.
Half an hour to find out?
No budget, no long form and no commitment. Half an hour to see whether I fit what you need.
Reply within 24 working hours