I build price monitoring systems: track price changes across many sellers and products, detect anomalies, store history, and alert when prices move. Based on my experience building cenoskop.sk and niftycent.com.
Build price monitoring infrastructure for products/sellers.
Built the price monitoring system for Cenoskop — tracking price changes across 500+ sellers and millions of products, with change detection, history storage and configurable alert thresholds. Also built Niftycent's US market monitoring pipeline.
We define the products/sellers and how often to re-check, build the monitoring pipeline with change detection and history, and validate against live data. From €2,500.
Initial price monitoring pipeline for a product/seller set.
Depends on your domain — I help you pick a cadence per seller that balances freshness against crawl load.
Other problems I help with.
Build ETL/import/transform/export pipelines for large datasets.
Details →Relevant production work.
Crawler monitoring millions of products. Processing 30M products daily and comparing them.
Built and maintain the full crawling pipeline — from scraping through Elasticsearch indexing to price comparison.
Price intelligence engine for the US market. Processing large-scale product data.
Built the data pipeline and crawling infrastructure for large-scale US product monitoring.
Describe the problem in a few lines — I'll look at it and tell you what I think.