Katalogo.pl
Full-stack business directory platform and the largest verified business database in Poland with 71,000+ listed companies. Serves 250K to 300K unique visitors monthly with real-time search, category filtering, city-based geolocation, and individual business profile pages. Includes a partner zone, business self-registration, promoted listings, and an admin panel for content management.
71K+
Listed businesses
250-300K
Monthly visitors
290+
Git commits
4,900+
Industry categories
What I built
- Architected the entire platform from scratch: database schema design, API layer, SSR/SSG rendering strategy, and frontend component system.
- Built a multi-tenant data pipeline ingesting and normalizing business data from multiple sources, with automated deduplication and category mapping across 4,900+ industry categories.
- Implemented SEO-first architecture with dynamic sitemap generation, structured data (JSON-LD), semantic HTML, and optimized meta tags. Result: strong organic visibility across thousands of long-tail local search queries.
- Designed a scalable search system with full-text PostgreSQL search, city + category compound filtering, and instant results rendering via server components.
- Created the 'Strefa Partnera' (Partner Zone) with business self-service: company registration, profile editing, photo uploads, and promoted listing management.
- Performance-optimized for Core Web Vitals: lazy loading, image optimization, efficient database queries with Prisma, and edge-ready deployment.