Served as Tech Lead, Software

Served as Tech Lead, Software Architect, and DevOps Engineer on a whole-country retail POS (Point of Sale) platform covering all stores nationwide. Designed the full architecture: Store POS (WPF/Blazor Hybrid) runs fully offline and syncs with the central system. One shared .NET API serves multiple POS terminals as cash registers, with an API Gateway integrating barcode scanners, bank terminals, and POS printers. Central system (Central POS) built on .NET API + Angular aggregates data from all stores. Sync Module handles ERP communication, Gift Card integration, background workers, and orchestrators manage async operations. Also handled CI/CD pipelines and deployment infrastructure.