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End-to-end AP, AR & bookkeeping support in Bexio, Exact Online & Snel Start—invoice processing, reconciliations, Google Sheet trackers and clean workflows.
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KSeF System — full-stack application for managing and submitting invoices to Poland's mandatory National e-Invoice System. Features a web dashboard (Thymeleaf + HTMX) with invoice pipeline tracking, PDF import via custom parser, and complete submission lifecycle: FA_VAT XML generation, XAdES digital signature, OAuth2 authentication, and government API integration. Built with DDD across 8 modules including offline mode with automatic retry queue and a CLI tool for batch processing.
Problem:
Many organizations still process invoices manually by reading PDF documents and entering key details (invoice number, vendor, amount, etc.) into systems. This process is slow, error-prone, and difficult to scale, and it also makes it harder to detect duplicate invoices or incorrect totals.
Solution:
This project builds an automated invoice processing pipeline that converts uploaded invoice PDFs into structured data. It uses OCR to extract text, LLMs to identify invoice fields, validation checks to ensure correctness, and Kafka-based event streaming to manage the processing pipeline. The extracted data is stored in PostgreSQL and visualized through a dashboard, enabling faster, scalable, and more reliable invoice processing.
Very real problem. Manual invoice processing is still surprisingly common and becomes a huge bottleneck as companies scale. Automating extraction and validation with AI can save a lot of operational time and reduce errors significantly.
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