Nexos is a Bulgarian software engineering company specializing in POS, payment terminal, fiscal device, and ERP integration. We connect the systems Bulgarian merchants already run, so that a sale, its payment, and its fiscal receipt happen as one operation.
Nexos integrates existing and custom POS systems with the fiscal devices and payment terminals used in Bulgaria. Nexos is the current brand of GNXSoft.
What we integrate
Every project follows the same model: your POS system stays in charge, and the Nexos integration layer handles communication with the devices and systems around it.
| We integrate | Examples | How we connect |
|---|---|---|
| Fiscal devices | Datecs, Daisy, Tremol, Eltrade — fiscal printers and cash registers | Direct drivers, manufacturer serial/USB/LAN protocols |
| Payment terminals | Bank and PSP terminals used in Bulgaria | ECR-to-terminal protocol: the amount is passed automatically, the result returns to the POS |
| POS & cash register software | Existing, legacy, and custom-built POS systems | REST APIs, SOAP, direct database connections, file exchange |
| ERP & back office | Inventory, accounting, and ERP systems | Two-way sync of products, prices, sales, and stock levels |
| Fuel stations | Dispensers, tank gauges, forecourt controllers | Forecourt protocols, fuel POS, fiscalization of fuelings — see Gas Station POS Software |
Fiscal integration and NRA compliance
We work within Bulgarian fiscal legislation: Ordinance N-18, SUPTO requirements, and reporting to the National Revenue Agency (NRA / НАП). We integrate fiscal devices from the manufacturers used in Bulgaria — Datecs, Daisy, Tremol, Eltrade — so that every sale from your POS or ERP is fiscalized correctly, with no manual re-entry.
POS → payment terminal integration
We link the POS to the payment terminal so the amount is sent to the terminal automatically and the transaction result is returned to the POS. This removes re-keying errors and speeds up the checkout. See also our online payment integration service for cards, wallets, and local payment rails.
Your existing POS can be retained
You do not need to replace your POS software to add a fiscal device, a payment terminal, or an ERP link. We integrate existing and legacy systems through REST APIs, SOAP, direct database access, or file exchange — whatever interface your system offers.
About Nexos
Nexos (Nexos LTD, Burgas) is a Bulgarian enterprise software company. Nexos is the current brand of GNXSoft — the same team and services under a new name. Beyond integrations, we build complete solutions: fiscal devices, POS & cash register integration, gas station POS software, retail & ecommerce platforms, and custom software development.
Frequently Asked Questions
- Can we keep our existing POS system?
- Yes. We integrate existing POS systems with fiscal devices, payment terminals, and ERP systems without replacing your POS software.
- Which fiscal devices do you integrate?
- Devices from the manufacturers used in Bulgaria: Datecs, Daisy, Tremol, Eltrade — in compliance with Ordinance N-18 and NRA requirements.
- Do you cover SUPTO and Ordinance N-18 requirements?
- Yes. We design integrations to meet Ordinance N-18, SUPTO requirements, and NRA reporting.
- Can you connect our POS to a bank payment terminal?
- Yes. The amount is passed to the terminal automatically and the transaction result is returned to the POS.
- Is Nexos the same company as GNXSoft?
- Yes. Nexos is the current brand of GNXSoft — same team, same services, under the name Nexos LTD and the nexos.bg domain.