Full-stack developer · SaaS product founder

Hugo Calvo García

I build and commercialize my own SaaS products and custom platforms for real clients, from product to support.

Own SaaS in production

Base
Madrid
Languages
ES / EN C1
Focus
Own SaaS products

Products

Three products in production, with real users and payments.

Own SaaS · In production

GEOPilot

SaaS platform for SEO and GEO (Generative Engine Optimization) content generation. AI article-generation pipeline, real token-based cost calculator, editorial calendar with scheduled publishing, and an AI visibility checker module.

Next.jsFirebaseGemini + ClaudeStripeVercel
Own SaaS · In production

Gestolio

Fiscal management PWA for Spanish freelancers: invoicing, expenses, VAT and income-tax calculations, quarterly tax summaries, fiscal calendar and an AI assistant. Freemium model with Stripe subscriptions.

Next.js 14SupabaseStripeWebAuthnPWA
Custom platform · Real client

Tu Casa en Jerez

Full multi-property vacation rental platform for a real client: booking engine with Stripe payments, guest registration compliance (Spanish SES), guest-host chat, loyalty and reviews system, and admin panel. Delivered and in production.

JavaScriptFirebaseStripeGoogle MapsWordPress

Profile

I don't build demos: I ship software that gets used and paid for.

I'm a full-stack developer and freelancer. I design, build and commercialize my own SaaS products and custom platforms for real clients, owning the full cycle: product, code, payment gateway, deployment, billing and support.

I work with Next.js, Firebase, Supabase and Stripe, and I integrate large language models (LLMs) into real product flows. Higher Technician in Multiplatform Application Development (2026).

01

Full ownership

From idea to paying users: product, development, payments, deployment and support.

02

Real payments

Subscriptions and charges with Stripe, freemium models and billing in production.

03

Applied AI

LLM integration and content-generation pipelines with cost and quality in mind.

Stack

Tools organized by the type of problem they solve.

Frontend

Responsive, accessible interfaces with a modern component architecture.

HTML5Responsive CSSJavaScriptReactNext.js

Backend and data

APIs, authentication and persistence on managed services and SQL.

Node.jsFirebaseSupabaseSQLREST APIs

Product and business

Payments, deployment, PWA and visibility so the product ships and gets paid.

StripeVercelPWASEO/GEOAnalytics

AI

LLM integration and content-generation pipelines in a real product.

Anthropic APIGeminiContent pipelinesPrompt engineering

Projects

Academic projects and earlier practice.

View academic projects (DAM studies)
  • DigiDeporte

    Multi-page sports store in HTML, CSS, JavaScript and PHP.

    Demo ↗
  • Ford dealership

    Corporate website with model pages and contact forms.

    Demo ↗
  • Real estate agency

    Object-oriented Java application run from the terminal.

    Code ↗
  • Android demo

    Mobile app in Java and XML on a testing environment.

    Try ↗

Process

How I take a product from idea to payment.

01

Product

I define the problem, the scope and the business model before writing code.

02

Development

I build with Next.js, Firebase/Supabase and APIs, integrating AI when it adds value.

03

Payments

I implement subscriptions and charges with Stripe, with freemium plans and billing.

04

Deployment and support

I ship on Vercel, measure with analytics and maintain the product with real users.

Contact

Let's talk about products, custom platforms or collaborations.

I'm open to freelance projects, custom platforms and collaborations where I can contribute product thinking, full-stack development and AI integration.

Send email