Software for retailers and e-commerce brands
Retail runs on thin margins and fast feedback. When the shop counter, the website and the marketplace each think a different amount of stock is left, you oversell, refund and lose the customer anyway.
RED SAG builds online stores, POS billing systems, inventory and order management, and the integrations that tie them together, for shops, D2C brands, distributors and multi-outlet retailers in India and abroad. Put together, that is omnichannel retail software: one view of stock, orders and customers, whether the sale happens at the counter, on your website or on a marketplace.
What makes retail and e-commerce software hard
Stock out of sync
Separate systems for the shop, website and marketplaces mean manual stock updates, overselling and cancelled orders.
Checkout drop-off
Slow mobile pages, forced sign-ups and failed UPI payments cost sales. Most retail traffic in India and abroad is on phones.
Returns and cash on delivery
Returns, RTO (return to origin) parcels and COD reconciliation eat margins unless order status and courier data flow back automatically.
Tax on every invoice
GST invoices, e-invoicing above the turnover threshold and e-way bills for goods movement must be correct every time, and rates change.
Customer data scattered
Walk-in and online customers sit in different lists, so loyalty offers and WhatsApp follow-ups reach the wrong people or no one.
Software we build for retail and e-commerce
Online stores
Shopify, WooCommerce or custom Next.js stores with fast mobile checkout, UPI and card payments, and SEO-friendly product pages.
E-commerce DevelopmentPOS and billing
Counter billing with barcode scanning, thermal printing, GST invoices, UPI QR payments and offline mode for unreliable connections.
POS & BillingInventory and warehouse
One stock ledger across outlets, warehouse and online channels, with reorder levels, batch and expiry tracking and transfers.
Inventory SoftwarePayments and reconciliation
Gateway integration with refunds, COD reconciliation and settlement reports that match orders to money received.
Payment Gateway IntegrationCustomer and loyalty
A single customer record across shop and website, with loyalty points, segments and WhatsApp or email campaigns.
Custom CRMShopping assistants
AI chat on your website or WhatsApp for order tracking, product questions and return requests, handing over to staff when needed.
AI ChatbotsHow we approach these projects
Pick the platform honestly
For many stores Shopify or WooCommerce is cheaper and faster than custom code. We recommend custom builds only when your pricing, catalogue or workflow genuinely needs them.
One source of truth for stock
We decide early which system owns stock, prices and customers, then sync everything else from it, so numbers never compete.
Measure the checkout
We track each step from cart to payment confirmation, so drop-offs and payment failures are visible and fixable after launch.
Test with real devices
Checkout and POS flows are tested on mid-range Android phones, real barcode scanners and thermal printers, not just a developer’s laptop.
Integrations we commonly build
Third-party access is sometimes limited by the provider. We confirm what is available for your account before quoting.
Store platforms
- Shopify
- WooCommerce
- Custom Next.js storefronts
- Amazon and Flipkart seller APIs where access allows
Payments
- Razorpay
- Cashfree
- PayU
- UPI QR
- Stripe
- PayPal
Shipping
- Shiprocket
- Delhivery
- Blue Dart
- ShipStation (US)
- Courier tracking webhooks
Accounts, tax and messaging
- Tally and Zoho Books exports
- QuickBooks and Xero
- GST e-invoicing (IRP) and e-way bill
- WhatsApp Business API
- Google Merchant Center
Compliance notes
Practical pointers, not legal advice. Rules change, so confirm the current position with your adviser; we build the software to match.
GST, e-invoicing and e-way bills
Invoices need correct GSTIN, HSN codes and tax splits. Businesses above the e-invoicing turnover threshold must generate IRNs, and goods movement above set values needs e-way bills. Keep rates and thresholds configurable, as they change.
E-commerce consumer rules
India’s Consumer Protection (E-Commerce) Rules require clear seller details, return and refund policies, a grievance officer and country of origin on listings. Dark patterns such as false urgency or drip pricing are also targeted by government guidelines.
Cards and payment data
Stores should never store card numbers. Hosted checkout and gateway tokenisation keep PCI DSS scope small, in India and abroad.
Privacy and marketing consent
Marketing messages need consent under the DPDP Act, GDPR or UK GDPR and, for the US, state privacy laws. We build opt-in and unsubscribe properly into forms and WhatsApp flows.
Relevant projects
Frequently asked questions
Should I use Shopify, WooCommerce or a custom store?
Shopify suits most brands that want low maintenance and fast setup. WooCommerce suits businesses already on WordPress or needing more control over hosting and plugins. A custom store makes sense for unusual pricing, B2B ordering, large catalogues or deep integration with your own systems. We will recommend the cheapest option that genuinely fits.
Can you connect my shop POS to my online store?
Yes. We set one system as the owner of stock and prices, then sync sales, returns and stock changes between the POS and the store, usually within seconds. If you already use a POS with an API, we integrate with it instead of replacing it.
Do you handle GST e-invoicing and e-way bills?
Yes. We integrate with the Invoice Registration Portal through a GST Suvidha Provider or API partner so invoices get an IRN and QR code, and generate e-way bills for shipments that need them.
Can you build for stores selling to the US, UK or Australia?
Yes. We handle multi-currency pricing, Stripe or PayPal payments, local shipping integrations and sales tax or VAT settings, and host close to your customers for speed.
What about marketplace sellers on Amazon or Flipkart?
Where the marketplace provides seller API access to your account, we can sync orders and stock into your inventory system. Access rules differ by marketplace and seller type, so we confirm what is available before quoting.
Other industries we work with
Fintech and Banking
Lending, payments, wallets and KYC onboarding with ledgers, audit trails and regulator-aware design.
Manufacturing and Textiles
Garment ERP, production and job work tracking, piece-rate payroll and buyer order management, built in Tiruppur.
Healthcare
Clinic management, booking, patient portals and telehealth, with privacy and busy front desks in mind.
Education
School management, fee collection, parent apps and course platforms, with children’s data handled carefully.
Hospitality and Travel
Direct booking engines, restaurant POS, table reservations and tour booking with payments and channel sync.
See also how we work and our security practices.
Building for retail and e-commerce? Let's talk.
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