class ReservationService {

  public function calculateTotal()
  {
      return $this->pricingService
          ->applySeasonModifier()
          ->applyDiscountRules()
          ->applyChannelCommission()
          ->applyTaxes()
          ->buildInvoice();
  }

}

// Domain rules evolve
// architecture decisions matter
// complexity grows over time
Back to experience

May 2023 – Present

FullStack Developer

Working as a FullStack developer at MisterPlan S.L , developing SaaS products in the tourism sector including PMS systems, Channel Managers and booking engines managing more than 2 million reservations per year.

My work is mainly focused on backend architecture, integrations and evolution of complex domain systems, while also contributing to the frontend when required. I work daily with PHP, MySQL, Docker and JavaScript within a product-oriented environment where scalability, reliability and maintainability are critical.

The platform integrates with multiple third-party providers across different domains including distribution platforms, electronic invoicing administrations and smart lock systems used by hotels and short-term rentals.

About the role

I work on backend systems that support business-critical SaaS products used by hotels and tourism companies. The platform processes large amounts of reservations, billing operations and third-party integrations.

My daily work focuses on evolving legacy systems towards cleaner architectures using principles such as SOLID, Domain Driven Design and Hexagonal Architecture.

Highlighted Projects

Electronic Invoicing SaaS

Unified invoicing system supporting multiple products and electronic billing regulations across Spain and Mexico.

Billing Regulations Architecture

Electronic Lock Integrations

Unified access management system integrating multiple smart lock providers used by hotels and rentals.

Integrations IoT Domain Design

Activity Channel Manager

Distribution platform connecting tourism activity providers with major booking marketplaces.

APIs Distribution Refactor