IMMEU

Overview

IMMEU aggregates real estate listings from across the European Union, providing a unified search experience for property hunters. The platform syncs data from multiple MLS providers in real-time using CDC pipelines, normalizing disparate schemas into a consistent format.

Technical Challenge

Aggregating and normalizing real estate data from dozens of European MLS providers presented unique challenges:

• Different data schemas across providers (some use XML, others JSON, some CSV exports)
• Multiple languages requiring proper text analysis and search relevance
• Varying update frequencies from real-time to daily batch updates
• Data quality issues requiring validation and enrichment pipelines

Approach

We built a robust data pipeline using change data capture (CDC) and stream processing:

• Debezium CDC pipelines capturing changes from source databases in real-time, eliminating the need for polling
• Kafka streams for data transformation and normalization, applying schema mappings and validation rules
• ElasticSearch with custom analyzers for multilingual property search, supporting 12 EU languages
• NextJS SSR for SEO-optimized listing pages, ensuring properties are discoverable via search engines
• PostgreSQL with PostGIS for normalized data storage and geographic queries

Data Pipeline Architecture

The ingestion pipeline processes data through several stages:

• Capture - Debezium monitors source databases for changes
• Transform - Kafka Streams applies schema normalization
• Enrich - Geocoding, price conversion, image optimization
• Index - ElasticSearch for search, PostgreSQL for persistence

Impact

Platform indexes over 500,000 properties across 12 EU countries with sub-second search response times. The multilingual search supports queries in any EU language while returning relevant results regardless of the original listing language.