VEZNE POS
The register keeps selling without internet — an offline-first point of sale that decides between receipt, e-Archive and e-Invoice automatically and seals day-end with a trusted timestamp.
VEZNE POS
VEZNE POS is a point-of-sale platform built for factory outlet stores, dealers, wholesale counters and retail chains — natively integrated with SCIENTA ERP, offline-first, and designed around Türkiye's e-document and fiscal cash register (YN ÖKC) regulations. The ERP is the single owner of product, price and customer data; the register reads it and produces sales — eliminating duplicate stock, duplicate accounts and reconciliation overhead.
The sales screen is keyboard-first: barcode focus is sticky, the entire flow runs on function keys, and a typical sale is verified in under 10 seconds by automated UI tests. Smart customer search automatically detects whether the entered value is a phone number, tax ID, national ID, account code or company name; a sale is linked from walk-in to a customer account with a single key. The document decision engine chooses between fiscal receipt, e-Archive and e-Invoice based on amount, customer type and taxpayer status — without asking the cashier.
When the internet goes down, sales continue unchanged on an encrypted local replica; sales requiring e-documents are queued and issued automatically through idempotent sync once the connection returns — the architecture is designed for up to 72 hours of fully offline operation. At shift close, cash is counted by denomination, the day-end package is sealed with an RFC 3161 timestamp over a SHA-256 digest, and balanced double-entry accounting vouchers are generated and delivered to SCIENTA. More than 300 automated tests — including integration tests against real PostgreSQL and power-failure scenarios — continuously verify every layer of the product.
Key Features
What makes this solution powerful.
Document Decision Engine
Automatically decides between fiscal receipt, e-Archive and e-Invoice based on amount, customer type, e-Invoice taxpayer lookup (cached for 24 hours) and operating mode; applies same-day cumulative amount checks per customer. Tax authority thresholds live in a parameter table — a new fiscal year requires data entry, not a code change.
Offline-First Selling
Sales are written append-only to a local database encrypted with SQLCipher and synced to the server idempotently through an outbox queue. Open carts and partial payments are restored from the journal after a power failure; an online/offline badge and pending-record counter are visible on every screen.
Smart Customer Search
A single search box automatically detects whether the input is a national ID, tax ID, phone number, account code or company name; results are shown masked for data privacy compliance. A sale is linked to or released from a customer account with one key; if no record exists, a new account is opened from the register with a mini form and synced to the ERP.
Split Payments
Cash, card, bank transfer, on-account and meal card can be combined in a single sale, with the remaining amount calculated live. On-account sales are checked against the customer's credit risk limit. Card transactions start and end on the fiscal device / EFT-POS — card data never enters the application.
e-Document Queue with Automatic Retry
e-Archive and e-Invoice issuance runs through a dedicated integrator client; while offline, documents are queued and the customer receives an information slip. Failed documents are re-issued periodically and idempotently on the server with exponential backoff.
Shifts and Tamper-Evident Day-End
Cashier PIN sessions, fast cashier switching and per-sale cashier attribution; denomination-based cash counting with X/Z reports. The day-end package is sealed with an RFC 3161 timestamp over a canonical JSON + SHA-256 digest — an audit guarantee that cannot be altered after the fact.
Native SCIENTA ERP Integration
Product, customer and tax-parameter replicas are delta-synced to the register (master data is server-wins). Balanced double-entry accounting vouchers (cash/POS/receivables versus sales/VAT breakdown) are generated automatically from each closed shift and are never sent before being reconciled against the client's independent day-end package.
BackOffice Administration and Reconciliation
Web-based administration with Keycloak SSO and a role-permission matrix: products, customers, tax parameters and terminals managed in one place. A day-end reconciliation card and triage list — with receipt-pending and e-document-error flags plus an anomaly filter — surface problem days instantly.
Advanced Capabilities
Enterprise-grade features and integrations.
Two Operating Modes
In Mode A the fiscal receipt is produced on the certified cash register (YN ÖKC), with information-slip flow for invoiced sales; in Mode B, for large chains exempt from fiscal devices, every sale is issued as an e-document. The decision engine produces the correct document for the selected mode.
Keyboard-First Screen
Sticky barcode focus, a full function-key map, quantity scanning with the 3*barcode pattern, and sale park/recall. The entire sales flow can be completed with the keyboard alone; a typical sale is verified in under 10 seconds by automated UI tests.
Hardware Abstraction Layer
Barcode scanner (HID/serial), ESC/POS receipt printer, cash drawer and customer display sit behind interfaces; a GMP-3 adapter contract is defined for fiscal device communication. The whole layer is testable without physical hardware through simulator implementations.
Terminal Security
Every terminal is registered on the server and syncs with its own key; document numbers are generated collision-free per terminal series, even offline. The local database password is derived from the cashier's PIN using Argon2id.
Benefits & Use Cases
Measurable value for your organization.
Sales Never Stop When the Internet Does
When the connection drops, the register switches to its offline badge and selling continues with local replica prices and stock. Once connectivity returns, the queue drains in order, e-documents are issued and delivered to customers.
No More Duplicate Records or Manual Reconciliation
The ERP is the single owner of stock, customers and prices; sales, account movements and accounting vouchers flow automatically. The duplicate stock and duplicate account problems of third-party POS setups disappear.
Regulation Changes Without Code Changes
Thresholds that change every fiscal year — such as the receipt upper limit — are kept in a parameter table with validity dates; the year transition is completed by data entry in BackOffice.
Audit-Ready by Design
Sale records are immutable (append-only); corrections are always made with reversal/return entries. The RFC 3161 sealed day-end package and per-sale cashier attribution keep who-did-what-when on record.
Proven Code Quality
More than 300 automated tests: domain rules are exercised with data-driven regulatory scenarios, the API passes integration tests against real PostgreSQL, and the sales screen is verified by automated UI tests. Hardware and integrator dependencies run behind simulators.
Implementation & Adoption
End-to-end support for seamless integration.
01
Register the Terminal, Sync the Data
The register terminal is enrolled on the server; product, customer and tax-parameter replicas are delta-synced down. Cashiers sign in with a PIN.
02
Complete a Sale in Seconds
Scan a barcode or pick from the quick-sale grid; link a customer account with one key when needed. Take cash, card, transfer, on-account or split payments on a single screen.
03
Let the System Issue the Document
The decision engine automatically selects receipt, e-Archive or e-Invoice. While offline, documents are queued; failed issuances are retried automatically.
04
Seal the Day, See the Reconciliation
After denomination counting and the Z report, the day-end package is sealed with a trusted timestamp and accounting vouchers flow to SCIENTA. The BackOffice reconciliation screen highlights differences and pending documents.
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