EspanaSol

Context / Problem

Client Katarzyna Tomczak needed a multilingual platform to showcase properties on the Costa del Sol market, a market where clients come from different countries (Poland, UK, Germany, Spain) and expect naturally sounding descriptions in their own language, not machine translations that “look machine-translated.”

Solution

Instead of WordPress with real estate plugins (heavy, slow, vulnerability-prone), I built the system from scratch on pure PHP with flat-file JSON architecture, no SQL database, dramatically simplifying hosting and backup.

Key elements:

• AI description generation: Claude API creates property descriptions from raw data (size, location, features)
• Translations: Gemini Flash automatically translates content to PL/EN/ES/DE
• Social media post generator: automatic creation of promotional content from listings
• Newsletter: full system with double opt-in, sent via PHPMailer/SMTP
• Email hardening: SPF, DKIM, DMARC from scratch
• Technical SEO: multilingual sitemap, correct hreflang tags

Technical challenges

The biggest challenge was designing the flat-file architecture to scale with a growing number of listings without migrating to a full SQL database, requiring a well-thought-out directory structure and JSON file indexing. The second challenge was setting up the AI pipeline (Claude + Gemini) so that content generation and translation were repeatable without manual correction every time.

Results

PageSpeed 96-100 on desktop, a rare result for real estate portals, which are usually weighed down by images and plugins. The platform runs in production and handles the full cycle: from adding a listing, through automatic translation, to promotion on social media.

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