ERP & Payment Integrations

Integrations Are Where Businesses Break or Scale

Most businesses do not run on a single system. There is an ERP for stock and accounting, an online store, a payment provider, perhaps a marketplace, an SMS service and a handful of partner APIs. When these systems do not talk to each other reliably, the result is familiar: stock that does not match, orders typed in twice, payments that succeeded but never reached the order. I build the integration layer that keeps all of it consistent.

Every integration project starts with the same question: which system owns which data? Does stock live in the ERP, are prices set in the store, who holds the payment status? A clear answer prevents most future inconsistencies while the design is still on paper.

ERP and Virtual POS Experience

As a Senior Software Architect at Takipsan A.Ş., I worked on Nebim V3 and MS-Shop ERP integrations and virtual POS. In the Kilit Grup — RFID & Nebim ERP project, every stock movement scanned on the floor is synchronised with Nebim V3 through queued jobs, so the ERP always reflects what physically happened in the store or warehouse.

On the payment side, I have built checkout flows for e-commerce and marketplace platforms. Extracım, an on-demand staffing marketplace, runs offer and counter-offer chains that end in a secure checkout, on a single Laravel codebase that serves the web app, a 160+ endpoint mobile API and the admin back office.

With virtual POS integrations, every step of the payment flow is recorded: when the payment starts, when the bank or payment provider calls back and when the order is confirmed. Cases such as “paid but no order” can then be detected and closed through reconciliation, while card data never touches your servers.

Built for Reliability, Not Just the Happy Path

An integration that works in a demo is easy. One that keeps working when a provider times out at 2 a.m. is the real job. My integrations follow a few principles:

• Queued jobs on RabbitMQ or Redis, so external calls never block users
• Retries with back-off and idempotent operations, so a retried job cannot create duplicates
• Clear, documented and tested data mapping between systems
• Logging, failure alerts and reconciliation reports
• Adapters behind clean interfaces, so a provider can be swapped without touching business logic

OneBill, an Irish Government-backed energy platform, shows why this matters. A customer uploads a utility bill, the system checks the tariff against every supplier in the market, moves the customer to the cheapest plan and keeps re-checking daily across electricity, gas and broadband. That daily re-check only works because it runs as dependable, scheduled background work rather than a fragile one-off script.

Messaging and Public-Sector APIs

Integrations are not only about money and stock. I connect SMS verification and notifications, WhatsApp alerts and public-sector APIs, such as municipal systems, with the same discipline: every message is triggered by an event, queued, and its delivery status recorded, so you can always see what was sent and what failed.

I work from Izmir, Turkey, with clients across Türkiye and abroad. If your systems need to finally speak the same language, I can map the flows, design the integration and run it in production with you.