Skip to main content
Zumaquero Dev.

Custom software and maintenance for companies that have outgrown their tools.

I build and maintain websites, applications and automations to remove manual processes, modernise systems and take responsibility for the technical side. 10+ years of experience in environments where stability and maintainability matter.

Tell me what you needAnalyse my project

Experience in projects across sectors such as banking, retail, insurance and telecoms

Problems I solve

If any of this sounds familiar, it's what I deal with.

Your website doesn't bring in enough customers

I turn it into a commercial tool, not a business card.

You have an application that needs to evolve

Maintenance, architecture and new features, without rewriting from scratch.

The software you use no longer fits

A solution adapted to the company's real processes.

You want to automate processes with AI

First I assess whether AI makes sense; then I build something useful and maintainable.

AI process automation

Software development services

Four lines of work under one technical standard. If you're not sure what you need, start with the overview of custom software development.

Corporate websites

Your current website loads slowly, doesn't look right on mobile or nobody finds it on Google. It doesn't matter whether you're a company or an independent professional: the answer isn't one more template, it's a technical foundation that holds up and a personal or corporate website worthy of your image.

From 900 €

See more

E-commerce

Every extra minute of load time in the checkout is lost sales. I build online shops that are fast, secure and ready for real traffic peaks.

From 1.800 €

See more

Mobile apps

An app that closes on its own or is slow to open loses users in the first session. I build Android and iOS apps with the same discipline I used in production banking.

From 3.000 €

See more

Maintenance

A website or app with no maintenance builds up security holes, outdated dependencies and the risk of breaching the GDPR/LSSI or being rejected by the app store. I review, update and respond when something breaks.

From 79 €/month

See more

Why me

Senior profile, not a junior with a template

10+ years writing software that runs in production with thousands of simultaneous users. I know which technical decisions become expensive a year from now and which don't.

You always talk to the person who writes the code

No salespeople in between and no brief lost between departments. You tell me the problem and I design, develop and deploy it myself.

Code that can still be maintained three years from now

Clear architecture, justified dependencies and documentation that's minimal but sufficient. No code that only the person who wrote it understands.

How I work

  1. 1

    Review

    I look at your website or your project idea: performance, security, architecture and what you actually need. Free and with no obligation.

  2. 2

    Fixed proposal

    You get scope, timeline and price in writing before starting. No surprises and no extra hours billed.

  3. 3

    Development

    Visible, reviewable progress from the first week, not a single delivery at the end of the project.

  4. 4

    Maintenance

    On delivery, you decide whether you need ongoing support: updates, backups and support when something breaks.

Does your website or project need an honest review?

Tell me in two minutes what you have and what you need. I'll come back with a real review, not a sales template.

Prefer an estimate for a new project? Request your no-obligation quote.