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Custom E-Commerce Development · Istanbul, Türkiye

Custom E-Commerce Development in Istanbul, Türkiye

We do not hand Istanbul businesses a ready-made theme: we study how you sell, then build the online platform and Android/iOS app your customers and staff actually need. Checkout with credit cards with instalments (taksit) and Troy cards, delivery through PTT Kargo or your own team, and VAT-ready invoicing.

  • Web platform + Android/iOS app
  • credit cards with instalments (taksit) and Troy cards
  • Delivery via PTT Kargo
  • Demo within 24 hours
Engineer writing code for a custom e-commerce platform — Istanbul

Quick answer

Who builds a custom e-commerce platform in Istanbul, Türkiye?

NNT Mart by N&T Software builds custom custom e-commerce platforms and mobile apps for businesses in Istanbul, Türkiye, designed to each client's requirements. Platforms support credit cards with instalments (taksit), Troy cards and iyzico, ship through PTT Kargo and Yurtiçi Kargo, follow the Personal Data Protection Law No. 6698 (KVKK), and come with a free demo within 24 hours of the requirements meeting.

Key takeaways

  • If you run a business in Istanbul and want to sell online, we build an e-commerce platform and mobile application to your exact requirements, from the first product page to the last delivery update.
  • Checkout ready for credit cards with instalments (taksit), Troy cards and iyzico, with delivery through PTT Kargo and Yurtiçi Kargo or your own team.
  • VAT-ready invoicing and controls designed around the Personal Data Protection Law No. 6698 (KVKK).
  • Free demo within 24 hours of the requirements meeting; you own 100% of the source code after final payment.

The case for a custom e-commerce platform in Istanbul

Istanbul is a largest city in turkey, where around 16 million people live and shop, and one of the markets in Türkiye where we build custom e-commerce platforms.

Key sectors include E-commerce, gaming studios, crypto exchanges and banks, with business districts such as Levent, Maslak, the Istanbul Financial Center and Kadıköy.

Logistics are supported by Istanbul Airport and Sabiha Gökçen Airport, which matters when you promise customers fast delivery.

Türkiye has a large, digitally fluent population and a culture of card instalments that strongly drives online sales. E-invoicing and ETBIS registration need to be part of the platform.

That is why more companies in Istanbul are moving from phone, WhatsApp and spreadsheet orders to a proper custom e-commerce platform — one place where products, prices, payments, orders and customers are managed together.

What makes a Istanbul store feel local

Conversion in Istanbul depends on small local signals — the right currency, the right words and the right payment and courier names.

Currency and pricing

Everything a Istanbul shopper sees — price, tax, delivery fee, refund — is in TRY, written the local way.

Language and content

Content can be produced in Turkish, so a Istanbul customer reads the store in the language they use at home.

Local trust signals

Badges for credit cards with instalments (taksit) and Troy cards, PTT Kargo delivery and clear return terms reassure first-time buyers in Istanbul.

Domain, phone and contact

Using .tr where it suits you signals a local business to shoppers and search engines. Click-to-call and WhatsApp buttons use the +36 calling code so customers reach you without dialling errors.

Talent and partners nearby

Istanbul draws on Boğaziçi, Istanbul Technical University and Koç University, which means plenty of local staff, interns and technology partners to run the store after launch.

A custom e-commerce platform built around your Istanbul business

We do not hand Istanbul businesses a ready-made theme: we study how you sell, then build the online platform and Android/iOS app your customers and staff actually need.

In Istanbul we typically work with enterprises with complex catalogues, multi-brand groups, businesses outgrowing SaaS platforms and companies migrating legacy stores, and with sellers in categories such as fashion, electronics, home and textiles and groceries that have strong online demand in Türkiye.

Before any commitment you get a free requirements meeting, a demo built on your use case and a proposal priced to your budget.

Core modules we build for Istanbul clients

These are the building blocks of a custom e-commerce platform. We scope them with you, so you pay for what your Istanbul operation needs.

Custom workflows

Product configurators, made-to-order flows, approvals, contracts and industry-specific rules. Revenue reports by product, repeat buyer and delivery area of Istanbul guide stock and marketing decisions.

Headless architecture

API-first commerce with a fast front end, so web, app, kiosk and marketplace channels share one backend. Content and design can follow how customers in Istanbul search and buy, including Turkish where you need it.

Multi-entity operations

Multiple brands, companies, warehouses, currencies and tax registrations on one platform. Catalogues come in from spreadsheets, ERP exports or supplier feeds, so your Istanbul team keeps its current way of working.

Deep integrations

ERP, PIM, WMS, CRM, POS, accounting and legacy systems with reliable, monitored data sync. Payment steps are built around credit cards with instalments (taksit), Troy cards and iyzico, the options shoppers here already trust.

Migration

Move from older platforms with product, customer and order history, SEO-safe redirects and parallel runs. Couriers such as PTT Kargo, Yurtiçi Kargo and Aras Kargo plug in alongside your own fleet for Istanbul orders.

Performance and security

Caching, CDN, load testing, security hardening, audit logs and cloud infrastructure as code. Inventory can sit in Istanbul, in a partner warehouse or across Türkiye, with click-and-collect where customers want it.

Checkout and payment methods for Istanbul

Checkout is where most online sales are won or lost. In Türkiye, customers expect to pay with credit cards with instalments (taksit), Troy cards and iyzico, and many also look for PayTR, bank transfer (FAST) and cash on delivery.

We integrate suitable gateways and providers for your business category and merchant eligibility, handle payment status, failed-payment retries and refunds, and keep sensitive card data with the provider rather than on your servers. All amounts are shown in Turkish lira (TRY).

For Istanbul customers ordering from Levent, Maslak, the Istanbul Financial Center and Kadıköy, cash-on-delivery and pay-on-pickup rules can be set per delivery zone.

  • Iyzico
  • Troy cards
  • Credit cards with instalments (taksit)
  • Cash on delivery
  • PayTR
  • Bank transfer (FAST)

Shipping, couriers and local delivery in Istanbul

Your custom e-commerce platform can book shipments and share tracking with PTT Kargo, Yurtiçi Kargo, Aras Kargo, MNG Kargo, Sürat Kargo and Trendyol Express, or route orders to your own riders and stores across Istanbul.

We set up shipping zones, cut-off times, free-shipping thresholds, cash-collection rules and returns so the promise on the product page matches what your team can deliver.

Connectivity in the area — Istanbul Airport and Sabiha Gökçen Airport — makes regional and national dispatch from Istanbul practical.

Tax, invoicing and compliance in Türkiye

Tax basics: Turkish VAT (KDV) is 20% standard with 10% and 1% reduced rates; e-Arşiv and e-Fatura invoicing are required above set thresholds.

On privacy we design around the Personal Data Protection Law No. 6698 (KVKK), including VERBIS registration for many data controllers; on consumer rights the store reflects Consumer Protection Law No. 6502 and the E-Commerce Law No. 6563, including ETBIS registration.

We build the technical controls — tax-inclusive pricing, compliant invoices, consent banners, terms and return pages, data-access roles and audit logs. We are not a law firm, so final legal and tax positions should be confirmed with your own adviser in Türkiye.

Istanbul sellers: marketplace plus your own store

Many Istanbul sellers already list on Trendyol, Hepsiburada, Amazon.com.tr, n11, Çiçeksepeti and Getir. Those channels bring traffic, but they also take commission, control the customer relationship and change rules without notice.

Your custom e-commerce platform becomes the hub: marketplaces and social shops become extra outlets fed from one catalogue, while repeat customers buy directly from you at better margins.

Who we build for in Istanbul

Popular online categories in Türkiye include fashion, electronics, home and textiles, groceries, beauty and furniture. Local demand in Istanbul is shaped by E-commerce, gaming studios, crypto exchanges and banks, so we often design catalogues and B2B ordering around those sectors. In Istanbul, we most often build custom e-commerce platforms for:

Enterprises with complex catalogues

We map how enterprises with complex catalogues sell today and digitise it end to end — from enquiry and order to payment, dispatch and repeat purchase.

Multi-brand groups

For multi-brand groups, we usually start with multi-entity operations, then add PIM and DAM once orders are flowing.

Businesses outgrowing SaaS platforms

Catalogue, pricing and fulfilment rules designed for businesses outgrowing SaaS platforms in Istanbul, connected to the systems you already use.

Companies migrating legacy stores

Companies migrating legacy stores get deep integrations plus performance and security workflows tailored to their operations.

Regulated sectors

We map how regulated sectors sell today and digitise it end to end — from enquiry and order to payment, dispatch and repeat purchase.

High-traffic retailers

For high-traffic retailers, we usually start with custom workflows, then add identity and SSO once orders are flowing.

Add a mobile app for Istanbul customers

In Istanbul, shoppers browse on phones first. Because the platform is API-first, customer, staff and partner mobile apps can be added at any point without rebuilding the backend.

One backend serves the website and the apps, and the apps ship under your own Google Play and App Store accounts — so what you change once appears everywhere.

Order alerts, offers and abandoned-cart reminders go out on Istanbul time (UTC+3), in Turkish if you want.

  • Identity and SSO
  • POS and store systems
  • WMS and 3PL systems
  • BI and data warehouses
  • PIM and DAM
  • Cloud platforms (AWS, Azure, GCP)
  • Search engines (Elasticsearch, Algolia)
  • SAP, Oracle, Microsoft Dynamics and Odoo ERPs

Integrations above are examples; we connect any system that offers a suitable API, database access or approved import and export process.

Launch roadmap and success metrics

Value first, depth later. For a custom e-commerce platform serving Istanbul, the usual sequence looks like this:

PhaseWhat goes live
FoundationArchitecture, core commerce, priority integrations and migration. Configured for TRY, credit cards with instalments (taksit) and PTT Kargo from the start.
DifferentiateCustom workflows, configurators and automation.
OptimisePerformance, new channels, apps and continuous enhancement. Reviewed against how Istanbul customers actually buy.

We track page load and API response times, uptime, order-sync accuracy, manual-work hours saved, release frequency and total cost of ownership on a live dashboard from day one, so Istanbul results are visible, not promised.

Time zones, language and support

Our team covers UTC+3 — 2h 30m behind India (IST) — through three 8-hour shifts, so a Istanbul client always reaches someone during the local working day.

We work in English and can deliver storefront content in Turkish. NDAs are signed on request, and you get a named project lead plus direct access to the engineers building your custom e-commerce platform.

Our head office is in Chhapi, Gujarat, with an office in Hyderabad and representation in Nigeria, South Africa, Ethiopia and Zambia; Istanbul clients are served remotely with on-site workshops when the project needs them.

Istanbul — local market for custom e-commerce platforms
Istanbul · Photo: Wikimedia Commons
Analytics dashboard monitoring a custom commerce platform — Istanbul

Istanbul — the market we build for

Sales analytics on a custom commerce dashboard — Istanbul
Custom E-Commerce Development

How we work

How a custom e-commerce platform project runs with N&T Software for Istanbul

Every custom e-commerce platform we build follows the same staged, quality-gated process, shaped around your requirements. You see progress every day, review it every week and give written sign-off at each milestone before any payment is due.

  1. 01

    Discover

    ✓ Scope signed off

  2. 02

    Design

    ✓ Architecture OK

  3. 03

    Build

    ✓ Sprint accepted

  4. 04

    Secure & Test

    ✓ UAT signed off

  5. 05

    Deploy

    ✓ Cutover done

  6. 06

    Handover

    ✓ Code handed over

  7. 07

    Support

    ✓ SLA active

You approve the working result before you pay

Milestones are customised to your requirements — six or more is typical, and delivery time is agreed around your scope. Every payment after the advance is released only after you have seen the working result and given written sign-off. Here is an example plan for a custom e-commerce platform:

Launch is where your custom e-commerce platform starts earning — so we stay accountable

Every project includes a free 90-day defect warranty. After that, the same team that built your custom e-commerce platform keeps it secure, updated and running on a fixed annual fee agreed up front — no open-ended hourly billing and no surprise invoices.

You own the code, the data and the IP

For every custom e-commerce platform, upon full and final payment the complete source code and intellectual property are transferred to you — so you can host, maintain and enhance the system with any developer.

Read the full Custom E-Commerce Development delivery process — reporting, payment milestones, warranty, team and engagement models →

Custom E-Commerce Development in Istanbul — FAQs

Which couriers do you integrate for deliveries from Istanbul?

Common choices are PTT Kargo, Yurtiçi Kargo, Aras Kargo, MNG Kargo, Sürat Kargo and Trendyol Express. We can also route orders to your own riders, stores or warehouses and set rules by zone, weight or delivery slot.

Which parts of Istanbul do you build for?

Clients usually trade around Levent, Maslak, the Istanbul Financial Center and Kadıköy, but the platform is not tied to one neighbourhood: delivery zones, pickup points and prices can be set for any part of Istanbul.

Do you provide support after launch for clients in Istanbul?

Every project includes a free 90-day defect warranty, followed by an optional fixed-fee annual support package with a dedicated developer, SLA-based fixes and a 24×7 helpdesk across three shifts.

What time zone and language will we work in for a Istanbul project?

Istanbul runs on UTC+3 (2h 30m behind India (IST)). We reply within 10 minutes around the clock, meet in your working hours and write storefront content in Turkish as well as English.

Is the platform compliant with local tax and privacy law in Türkiye?

We build the technical controls — tax-inclusive pricing, compliant invoices and consent management — with the Personal Data Protection Law No. 6698 (KVKK) in mind. Final legal and tax positions should be confirmed with your adviser.

How long does it take to launch a custom e-commerce platform in Istanbul?

Timelines are agreed around your scope. You see a demo within 24 hours of our requirements meeting, and a phased plan lets priority journeys go live first while further modules follow.

Can you migrate my existing website or store in Istanbul?

Yes. We review your current platform, products, customers, orders and URLs, then migrate with redirects so you keep search rankings and order history.

Can I also sell on Trendyol and Hepsiburada?

Yes. Your own custom e-commerce platform can sit alongside Trendyol, Hepsiburada and Amazon.com.tr; where APIs allow, we sync products, stock and orders so your team manages everything from one admin.

Is there a custom e-commerce platform development company near me in Istanbul?

NNT Mart serves Istanbul remotely from India, so you do not need a local office. The requirements meeting is online or by phone in your working hours (2h 30m behind India (IST)), we reply within 10 minutes any day, and you see a working demo within 24 hours of the meeting.

How do I choose the best custom e-commerce platform development company for Istanbul?

Compare partners on four things: custom work to your requirements, local payment and delivery support, full source-code ownership and post-launch support. NNT Mart covers all four, with credit cards with instalments (taksit), Troy cards and iyzico checkout, PTT Kargo delivery, 100% source code after final payment and a free 90-day defect warranty.

Is NNT Mart an ecommerce agency or an ecommerce platform for Istanbul businesses?

NNT Mart is the e-commerce platform and development team of N&T Group, run by N & T Software Private Limited. Think of it as your ecommerce agency in India for Istanbul: we design, build and support stores, B2B ecommerce portals, marketplaces and apps to your requirements.

Free demo in 24 hours

Plan your custom e-commerce platform in Istanbul

Tell us what you sell and how you take orders today. We reply within 10 minutes, meet you to understand your requirements, and share a working demo within 24 hours.

We reply within 10 minutes, 24×7. Your details are used only to respond to your enquiry — see our privacy policy.

Tell us what you sell. We will show you a working demo in 24 hours.

Free requirements meeting, a demo built on your use case and a proposal priced to your budget — with no obligation.

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