App development — Marbella & Costa del Sol

App development in Marbella — for everything you still do by hand.

Booking engines, client portals, dashboards and AI tools — scoped in one 15-minute call, built end-to-end by one developer, priced fixed before work starts. If your business runs on spreadsheets and WhatsApp threads, this is what replaces them.

Available for new projects · Marbella · --:--

App development in Marbella usually means one of two things: an agency quote for a native app you don't need, or another year of running the business on spreadsheets because custom software feels out of reach. There's a third option. I build custom web apps for Costa del Sol businesses — booking engines, client portals, admin dashboards, AI automations — scoped in a 15-minute call, quoted fixed on the spot, and built end-to-end by the person you talked to.

This isn't theory. For Hotel Viktoria I built Menu Atelier, a trilingual menu studio where AI turns the chef's PDF into a ready weekly menu template in under a minute. For a consular service in Miami: a trilingual client portal with a document vault, six-step case tracking, appointment booking and Stripe billing, plus the admin dashboard behind it. Swiss Graph runs an AI market-intelligence SaaS with its own chat agent and paid subscriptions. Different industries, same pattern — manual work in, working software out.

Everything I build is a web app. It runs on any phone, tablet or laptop from one codebase, installs to the home screen like a native app, and skips the app store entirely. No review queues, no double codebase for iOS and Android — which is most of the reason native quotes run so high. The stack is modern — Next.js, React, Supabase, Stripe, LLM pipelines where AI actually earns its place — and everything ships fast-loading, mobile-first and SEO-ready.

01

What you get

Client portals

Give clients one login instead of forty email threads. Document uploads, status tracking, appointment booking, billing — the Miami consular platform runs all of it in three languages, with a document vault and Stripe payments behind an admin dashboard. Client portal development that replaces your inbox as the system of record.

Booking systems

Availability rules, multi-step wizards, confirmations, WhatsApp follow-up — a booking system built around how you actually take bookings. Prisma Clinic Marbella runs patient booking through a multi-step wizard in three languages, with WhatsApp wired in. Fewer phone calls, fewer no-shows, every booking in one place.

Admin dashboards

See the whole business on one screen. Custom dashboard development means the dashboard matches your operation — not the other way around. Occupancy, leads, cases, revenue, whatever you currently dig out of spreadsheets — pulled live, filterable, and readable on a phone between meetings.

Payments & billing

Stripe wired in properly — one-off payments, subscriptions, refunds, receipts. Swiss Graph runs paid subscriptions on it; the Miami consular platform bills clients through Stripe with a full admin dashboard behind it. You stop chasing bank transfers over WhatsApp and start getting paid when the work is booked.

Document handling

Contracts, PDFs, certificates, menus — uploaded, stored, versioned and found again. The consular platform runs a full document vault; Menu Atelier reads a chef's PDF and turns it into a ready weekly menu template in under a minute. If paper is your bottleneck, this is the fix.

Integrations & AI

Your app should talk to the tools you already run on — WhatsApp, calendars, payment providers, email. Where AI genuinely saves hours, I wire it in: Unhosted AI runs eight specialized research agents, Swiss Graph ships its own AI chat agent. Automation that pays for itself — not AI for the sake of it.

02

Proof, not promises

6.3M+

Google impressions

209K

Clicks from search

25+

Sites shipped

5+

Years of experience

Search traffic measured in Google Search Console across client properties. Speed is only one of the things Google looks at; these are the results on sites built to load fast. See the full numbers in the case studies.

Most web app development for Costa del Sol businesses happens over email with someone three time zones away. I'm based in Marbella — when scoping a booking engine or portal, I can sit in your clinic, hotel or agency from Estepona to Málaga and watch how the work actually flows before quoting it. And this coast runs multilingual by default: I've shipped projects in eight languages, so your English, Spanish, German and Scandinavian clients get the same experience. Remote works too — the consular platform ran from Miami, Swiss Graph from Switzerland.

03

First call to live, in days

Apps take longer than landing pages to build — but the process starts the same way. One 15-minute call, and you leave it with a fixed price and a delivery date that don't move. Here's how the first days run, whether it's a one-page site or a full platform.

Day 0

The call

A 15-minute chat about your business and what you need. You get a fixed price and a delivery date on the spot — no proposals, no waiting.

Day 1

Design & build

I design and build in one pass. You get a live preview link the next day — a real website you can click, not a PDF mockup.

Day 2

Your feedback

One focused revision round, applied straight to the live preview while we talk. Most changes happen within the hour.

Day 3

Launch

Domain, SEO, analytics, WhatsApp — wired and live. Simple landing pages can launch 24 hours after our first call.

No agencies, no hand-offs, no six-week timelines. You talk to the person who builds it — that's why it's fast.

04

Simple pricing

Landing

from €500

One page that sells

  • Landing page designed & built
  • Copy, SEO basics & analytics
  • WhatsApp / contact capture
  • Live in 24–48 hours
Start with a landing

Business site

from €1,500

Your whole business, online

  • Multi-page site, custom design
  • Booking flows & lead funnels
  • Multilingual + full SEO setup
  • Google reviews & analytics
  • Live in 1–2 weeks
Build my site

most popular

Platform & AI

€3,000+

Custom builds, scoped together

  • Dashboards & client portals
  • AI bots & automations
  • Payments, auth & documents
  • Timeline depends on scope
Scope it with me

Every project ships fast-loading, mobile-first and SEO-ready. Prices are starting points — you get an exact fixed quote on our first call, and it doesn't change after.

05

Questions, answered

Custom platform work starts at €3,000 with me — dashboards, client portals, booking engines, AI bots and automations, payments, auth and document handling, scoped together so the quote covers exactly what you need. You get a fixed price on the first call and it doesn't change after — no hourly meter, no surprise invoices. Simpler needs cost less: a landing page starts at €500, a full business site at €1,500. The prices are published right here — I'd rather you know the number before we ever talk.

also looking for

An app isn't always the answer. If you need a full business website that ranks or a landing page that's live this week, those have their own pages.