API & Integration Development

Modern businesses run on connected systems. Your website needs to talk to your CRM. Your online store needs to sync with your inventory. Your booking system needs to send confirmation emails and update your calendar. We build these connections. API development: RESTful APIs, GraphQL endpoints, webhook handlers, OAuth2 authentication, rate limiting, documentation (OpenAPI/Swagger). Common integrations: Stripe and payment gateways (Redsys, PayPal, Bizum); CRM systems (HubSpot, Salesforce, Zoho); ERP systems (SAP, Odoo, Holded); Email marketing (Mailchimp, Sendinblue, ActiveCampaign); Shipping (Correos, SEUR, MRW, DHL APIs); Calendar and booking (Google Calendar, Calendly); Analytics (Google Analytics 4, Plausible, custom dashboards); and social media (Instagram, Facebook, LinkedIn APIs). We also build middleware and data pipelines for businesses that need to synchronize data across multiple platforms. From €192,40.