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Contact

Write to us and you get a reply from a person, not a switchboard.

Tell us what you need and we will reply within 24 business hours. If you would rather talk it through, we will give you a free one-hour session with the person who would lead your project.

Write to us

Tell us what you need

Your message goes straight to hola@dsanexus.com. The better you describe the process, the more useful our first reply will be.

One hour with the person who would lead your project

Technical, not a sales call. We review your actual process and you leave with a written recommendation, even if it is «do not build it». Under a signed NDA if you need one.

Contact details
General emailhola@dsanexus.com
Client supportsoporte@dsanexus.com
Phone · Madrid+34 91 829 31 79
WhatsApp+34 602 652 444
OfficeC/ San Emilio 66, Local 3
28017 Madrid, Spain
A signed non-disclosure agreement before any sensitive information is shared.
Where we are

You can come to Madrid, or we can come to you. Both work.

Madrid
Head office and engineering
C/ San Emilio 66, Local 3 · 28017
Monday to Friday · 08:00 – 18:00 CET
We serve Spain, the rest of Europe and Latin America

Before you write

Is the assessment session really free?
Yes, and so is the written recommendation. It pays off for us because it rules out poor-fit projects early, and because in one out of every five sessions the conclusion is that nothing needs to be built.
Do you work with small companies or only mid-sized ones?
The smallest engagement our method can sustain is around six weeks of work. Below that, the cost of doing it properly is not worth it and we usually point you elsewhere.
Can you take over a project started by another supplier?
Yes, and it happens often. It always starts the same way: a fixed-price technical audit over ten business days that says what can be reused and what cannot. Without that audit we do not commit to a timeline.
What languages do you work in?
Spanish, Portuguese and English. Technical documentation is delivered in the language set by the contract, and code and comments are always in English by convention.
DSA Nexus

Process consulting and custom software engineering for mid-sized companies in Spain and Latin America.

Based in Madrid · Projects in Spain and Latin America
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DSA Nexus S.L. © 2026. All rights reserved. · ISO 9001:2015 certified by LRQA