Fiscal printer microservice + Electron app

Every brand of fiscal printer has different interfaces, commands and protocols. This fact makes it almost impossible to reliably integrate fiscal printing in a software that needs it. To solve this issue, I created a microservice + manager interface in NodeJS / TypeScript + Electron (desktop app). This included:

Researching and implementing different protocols for different printers

Consolidating all brands into a static set of endpoints

Designing and developing a consolidated API, that would cover all different printers with the same endpoints

Creating a very simple dashboard for licensing and troubleshooting

Designing and developing the UI for the manager, keeping it as simple as possible

Implemeting a custom DNS server, to allow local HTTPS requests without self-signed certificates