A point-of-sale platform developed for retail and hospitality businesses in Croatia, enabling merchants to manage multiple branches under a unified configuration system.
Architected with a microservices approach to isolate high-frequency register transactions from administrative reporting and government-related fiscal compliance workflows.
The platform was engineered to serve retail and commercial businesses operating across one or more physical branches in Croatia. Each business required the flexibility to configure their own inventory rules, assign registers to branches, and execute point-of-sale transactions reliably during daily operations.
Managing multi-branch retail operations requires consistent pricing and inventory coordination without making branch checkouts vulnerable to wide-area network lags. In addition, businesses in Croatia must comply with fiscalization protocols for invoicing transactions.
The system was structured across independent services that split checkout flows, branch configuration, and fiscalization reporting into cohesive functional areas.
As a full-stack engineer on the platform, I contributed to the Next.js cashier interface, Express backend service endpoints, and data validation layers that ensure transaction integrity between branches.
To safeguard checkout responsiveness, the fiscalization communication pipeline was isolated from the primary cashier checkout thread. Transactions are recorded locally and acknowledged immediately, while fiscalization dispatches execute via dedicated workers with retry queues.
Microservices
Multi-Branch
Croatia Fiscal
Next.js
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