Enterprise E-commerce Platforms engineered for catalogue scale, GST billing and ERP sync
We design and build online stores, B2B ordering portals and multi-vendor marketplaces on Shopify Plus, Adobe Commerce (Magento), WooCommerce, headless Next.js and custom Laravel or Node.js stacks. Each platform is connected to your ERP, Tally, payment gateways and courier partners, so orders, stock and GST invoices stay in sync without manual entry.
- Source code, store admin and hosting accounts owned by you
- PCI-DSS compliant checkout through Razorpay, PayU, Cashfree or Stripe
Storefront
Next.js, Shopify Hydrogen or theme, PWA and mobile app · Customer layer
Commerce engine
Catalogue, price lists, promotions, cart and checkout · Core
Back-office integrations
ERP, Tally, WMS, GST e-invoice, Shiprocket, Delhivery · Operations
Growth & retention
Site search, reviews, loyalty, WhatsApp commerce · Retention
- Monitored for uptime, Core Web Vitals and checkout conversion
Storefronts, B2B portals, marketplaces and the integrations behind them
Choose a platform build, a replatforming project or a single integration. Each service lists what we deliver and the technology we use.
Shopify Plus Development
Custom Online Store 2.0 themes and Shopify Plus builds for D2C brands that need speed to market with room for complex logic.
- Checkout Extensibility and Shopify Functions for discounts and delivery rules
- Shopify Markets for multi-currency and international pricing
- Custom apps for ERP, loyalty and subscription sync
Adobe Commerce (Magento 2) Development
Multi-store, multi-language catalogues with complex pricing, built and maintained on Adobe Commerce or Magento Open Source.
- Custom modules and third-party extension audits
- B2B module: company accounts, shared catalogues, quotes
- Version upgrades and security patching
WooCommerce Enterprise Builds
WooCommerce stores tuned for high order volumes, for businesses that already run content and SEO on WordPress.
- High-Performance Order Storage (HPOS) and Redis object cache
- Custom plugins in place of heavy plugin stacks
- Staging, Git deployment and automated backups
Headless & Composable Commerce
A Next.js storefront on top of Shopify, commercetools or Medusa, rendered at the edge for fast pages on every device.
- GraphQL storefront APIs and incremental static regeneration
- Headless CMS for landing pages and editorial content
- One backend serving web, app and kiosk channels
Custom Commerce Platforms
Purpose-built platforms for pricing, approval or fulfilment workflows that off-the-shelf software cannot handle.
- Rule-based pricing, bundles and configurators
- Role-based admin with approval chains
- Documented REST APIs for future integrations
Platform Migration & Replatforming
Moves from Magento, OpenCart or legacy builds to Shopify, WooCommerce or headless without losing orders, customers or search rankings.
- Product, customer and order history migration
- Full 301 redirect map and Search Console monitoring
- Parallel run and cut-over plan with rollback
B2B Ordering Portals
Self-service ordering for dealers, distributors and retailers, replacing phone and WhatsApp orders.
- Customer-specific price lists, MOQ and slab discounts
- Credit limits, outstanding balance and payment terms
- Quick order by SKU, reorder and request-for-quote
Multi-Vendor Marketplace Development
Marketplaces where independent sellers list, sell and get paid, with the platform taking a configurable commission.
- Seller onboarding with GSTIN, PAN and bank KYC
- Commission rules by category, seller or product
- Split settlements through Razorpay Route or Stripe Connect
Subscription & Membership Commerce
Recurring orders for consumables, meal plans, memberships and replenishment products.
- UPI AutoPay and card e-mandates within RBI rules
- Pause, skip and swap from the customer account
- Member-only pricing and early access
Marketplace & ONDC Channel Integration
One catalogue and inventory feeding your own store and marketplaces, with orders flowing back to a single dashboard.
- Amazon SP-API, Flipkart, Myntra and Meesho sync
- ONDC seller app integration
- Channel-level stock buffers to prevent overselling
ERP, Tally & Inventory Integration
Two-way sync between your store and back office so stock, prices and orders update without spreadsheets.
- Tally Prime, SAP Business One, Dynamics 365 and Zoho Inventory
- Real-time stock by warehouse and batch
- Integration with EPA Inventory & Billing suite
GST Invoicing, E-invoice & E-way Bill
Tax-compliant invoicing built into the order flow for B2C and B2B sales across Indian states.
- GSTIN capture and validation at checkout
- HSN codes, CGST / SGST / IGST split by place of supply
- IRN generation and e-way bills through a GSP
Payment Gateway & Checkout Engineering
Checkout flows that reduce drop-off and failed payments, with fallback gateways for high-traffic days.
- Razorpay, PayU, Cashfree, Stripe and PayPal
- UPI intent, EMI, BNPL and saved cards
- COD with RTO risk scoring and prepaid nudges
Shipping, Logistics & Returns
Courier integrations that assign carriers, print labels and keep customers updated without manual work.
- Shiprocket, Delhivery, Blue Dart and DTDC APIs
- Pincode serviceability and delivery-date estimates
- NDR handling and a self-service returns portal
Product Information Management (PIM)
A single source of product data for catalogues with thousands of SKUs, variants and channel-specific content.
- Attribute sets, variant matrices and bulk import
- Image and video digital asset management
- Channel-specific titles and descriptions
Site Search, Filters & Merchandising
Search that understands how Indian customers type, with filters and ranking rules your team can control.
- Typo tolerance and Hindi–English synonyms such as saree and sari
- Faceted filters by size, fabric, colour and price
- Boost, bury and pin rules for campaigns
Performance, Security & Scalability
Infrastructure prepared for sale events such as Diwali and end-of-season sales, when traffic can spike within minutes.
- Core Web Vitals tuning and image CDN
- Load testing before every major sale
- Cloudflare WAF, bot protection and PCI-DSS SAQ support
Mobile Commerce Apps & PWA
Android and iOS shopping apps and progressive web apps that share the same catalogue, cart and customer accounts.
- React Native or Flutter apps on the same backend
- Push notifications for price drops and back-in-stock
- Play Store and App Store publishing
From discovery to launch in five stages
Architecture and integrations are agreed before design starts, so there are no surprises at go-live.
Discovery & architecture
Workshops on SKUs, order volume and workflows. Integration map, platform recommendation and total cost of ownership.
UX & design
Wireframes and designs for home, listing, product, cart, checkout and account pages, built on a reusable design system.
Development & integrations
Store build, data migration and ERP, payment, GST and courier integrations in two-week sprints with demos.
QA, load test & UAT
Test orders through every gateway, invoice checks, device testing and load testing at expected peak traffic.
Go-live & hypercare
Redirects, DNS cut-over and monitoring, followed by 30 days of priority fixes and team training.
Which e-commerce platform fits your business
The right platform depends on catalogue complexity, order volume, integrations and who will manage the store day to day. We recommend one only after the discovery workshop.
Shopify Plus
Fast launch, managed hosting and a large app ecosystem. Suits brands that want to focus on marketing over infrastructure.
Adobe Commerce
Multi-store, multi-language and B2B features built in. Suits manufacturers and retailers with large, structured catalogues.
WooCommerce
Runs on WordPress with full code ownership. Suits businesses with strong SEO content and moderate order volumes.
Headless
Separate front end on Next.js for the fastest pages and one backend for web, app and in-store screens.
Custom build
Built from scratch when pricing, approvals or fulfilment rules do not fit any standard platform.
Marketplace
Vendor onboarding, commissions and split payouts for platforms that connect many sellers with buyers.
E-commerce builds by industry
Catalogue structure, compliance and fulfilment differ by sector. These are the ones we build for most often.
Sarees, ethnic wear & apparel
Variant-heavy catalogues for Banarasi and handloom sarees, zoomable fabric imagery, blouse stitching options and international shipping in multiple currencies.
Pharmacy & healthcare
Prescription upload and verification, batch and expiry tracking, Schedule H checks and integration with our Hospital Management Suite.
FMCG distributors & wholesale
Retailer ordering apps with scheme and slab discounts, beat-wise delivery routes, credit limits and Tally sync.
Electronics & appliances
Serial number capture, EMI and no-cost EMI offers, warranty registration and installation booking after delivery.
Handicrafts & exporters
Multi-currency pricing, DDP and DAP shipping, export invoices with IEC and international payment gateways.
Salons, wellness & beauty retail
Product sales and service bookings in one checkout, linked to the EPA Salon & SPA Suite for stock and client history.
Commerce engineering and ERP expertise under one roof
We build ERP, billing and inventory software as well as online stores, so the integrations that usually break after launch are designed in from the first sprint.
You own the code and accounts
Git repository, hosting, domain, payment gateway and store admin are registered to your business.
Back-office experience
Our team builds inventory, billing and ERP systems, so stock, pricing and invoicing logic is handled correctly.
Built for Indian compliance
GST, e-invoicing, e-way bills, RBI e-mandate rules and DLT-registered SMS are handled as part of the build.
SLA-backed support
Support plans with defined response times, sale-day monitoring and a named developer who knows your code.
Handed over on go-live day
- Staging and production environments
- Git repository access and deployment pipeline
- 301 redirect map and SEO carry-over checks
- GA4 e-commerce events and Meta Conversions API
- Admin training sessions and recorded videos
- Integration and API documentation
- Automated backups and uptime monitoring
- 30 days of post-launch hypercare
Standard
Business-hours support and monthly updates
Priority
4-hour response and sale-event monitoring
Dedicated
Named developer and a sprint-based roadmap
Choose how you want to work with us
Projects are quoted after discovery, based on platform, integrations and catalogue size. Every estimate is broken down by phase.
Platform Audit
Review of your current store, hosting, integrations and checkout with a prioritised fix list.
- Speed and Core Web Vitals report
- Checkout and payment failure review
- Replatforming recommendation
Store Build or Migration
A defined project with fixed milestones, from design through launch and hypercare.
- Discovery and architecture
- Design, build and integrations
- Launch plus 30-day hypercare
Managed Support
Ongoing maintenance, updates and small enhancements under an SLA.
- Security patches and updates
- Uptime and error monitoring
- Monthly enhancement hours
Dedicated Commerce Team
A product team of developers, a designer and a QA engineer working on your roadmap.
- Sprint planning and demos
- Feature roadmap ownership
- Integrated growth and SEO support
E-commerce development questions we are asked most
Something not covered here? Call +91 91150 89470 or email info@epaits.com.
Should we choose Shopify, WooCommerce or Magento?
Shopify Plus suits D2C brands that want fast launch and managed hosting. WooCommerce suits content-led businesses already on WordPress. Adobe Commerce suits large, multi-store or B2B catalogues. We recommend a platform after reviewing your SKU count, order volume, integrations and in-house team.
How long does an enterprise e-commerce build take?
A Shopify Plus or WooCommerce store with standard integrations typically takes 8 to 12 weeks. Adobe Commerce, headless or marketplace builds with ERP and GST integration usually take 14 to 20 weeks. The discovery phase produces a week-by-week plan.
How much does an enterprise e-commerce platform cost?
Cost depends on the platform, number of integrations, catalogue size and custom features. We provide a fixed-scope quote broken down by phase after a discovery workshop, along with ongoing platform and hosting costs so you can compare total cost of ownership.
Can you migrate our store without losing search rankings?
Yes. We map every old URL to its new equivalent with 301 redirects, carry over meta data and structured data, and monitor Search Console for crawl errors for at least 30 days after launch.
Can the store sync with Tally or our ERP?
Yes. We integrate with Tally Prime, SAP Business One, Microsoft Dynamics 365, Zoho Inventory and custom ERPs, including EPA’s own Inventory & Billing suite. Stock, prices, orders and invoices can sync in real time or on a schedule.
Do you support GST e-invoicing and e-way bills?
Yes. We capture and validate GSTIN at checkout, apply HSN codes and the correct tax split by place of supply, and generate IRNs and e-way bills through a GST Suvidha Provider for eligible B2B orders.
Will the site handle traffic during big sales?
We load test every store at expected peak traffic before major sale events, use CDN caching and autoscaling hosting, and offer sale-day monitoring with our Priority and Dedicated support plans.
Who owns the code, hosting and data?
You do. The Git repository, hosting account, domain, payment gateway and store admin are registered to your business. If you move to another vendor, everything stays with you.
Services that work alongside your store
Get an architecture plan and phased estimate for your store
Share your current store, SKU count and monthly order volume. Within 5 working days we send a platform recommendation, integration map and phase-wise estimate.
- Platform and total cost of ownership comparison
- Integration map for ERP, payments and logistics
- NDA available on request
Request your platform audit
We reply within one working day.