Custom B2B and B2C e-commerce platforms
Online sales portals integrated with your ERP, Mexican payment gateway, automatic CFDI 4.0 invoicing and logistics — not an isolated Shopify with wholesale prices. For Mexican companies selling to businesses or to end consumers.
We build custom e-commerce platforms —B2B, B2C or omnichannel— connected to your real operation: real-time inventory, per-customer pricing, commercial credit, electronic invoicing and carriers.
Serious B2B e-commerce is not "putting wholesale prices in a store"; it is a system that syncs catalog, inventory, prices, orders and invoices with your ERP (SAP, Dynamics, CONTPAQi, Business One) through middleware, so the customer sees correct availability and prices with no double entry.
Why iTechDev
Fixed budget
Scope and price defined before we start. No hourly billing, no ambiguous scope.
Code 100% yours
All code and configuration are your property from the first commit. No vendor lock-in.
Progress every 2 weeks
Live functional demos each sprint. You see real progress, not a months-long black box.
Engineering with process
CMMI Level 2, 5.0★ on Clutch and 200+ projects. Nearshore team in Monterrey + Texas, in your time zone (CST).
When you need a custom platform
What the platform includes
Catalog with advanced search
Search by name, SKU, category and specification; filters, product pages with images and PDF datasheet, and configurable units of measure (piece, box, pallet).
Cart and checkout
Multi-product orders, CSV/Excel import, saved carts, multiple shipping addresses, PO reference and notes — built for both B2B and B2C.
Mexican payment gateway
Card via Stripe, Conekta, Mercado Pago or PayPal; SPEI bank transfer with reference for reconciliation; and commercial credit with line validation against the ERP.
CFDI 4.0 invoicing
Automatic CFDI generation when the order is processed via a certified PAC (Facturama, Finkok, SW Sapien), with XML and PDF in the customer portal and payment complement.
Real-time inventory
Availability synced from the ERP by warehouse/distribution center, low-stock alerts and out-of-stock handling with backorder.
Logistics and carriers
Rate quoting and label generation with FedEx, DHL, Estafeta or Paquetexpress via API; tracking in the portal; option for own fleet, 3PL or pickup at distribution center.
Admin panel
Management of catalog, price lists by customer/segment, orders, customers, roles (buyer, approver, admin) and operations reports.
SEO, performance & shopping experience
For B2C and public catalogs: server-side rendering so Google indexes your products, optimized Core Web Vitals, product pages with structured data (JSON-LD) and a fast checkout. A slow store, or one that doesn't show up in search, won't sell no matter how well it's integrated with the ERP.
How we build it
Discovery and strategy
We analyze your sales process, catalog and ERP. We define B2B/B2C/omnichannel, MVP features, integrations (ERP, PAC, carriers) and pricing policies. Deliverable: architecture, fixed budget and wireframes.
Architecture and integrations
We design the data model and the integration contracts with your ERP through middleware (never a direct connection) for inventory, prices, orders and invoices, defining what runs real-time and what runs in batch. Deliverable: an integration diagram and agreed contracts.
Agile development
2-week sprints with functional demos: catalog, cart/checkout, payments, CFDI invoicing and admin panel. CI/CD from day 1. Deliverable: an increment deployed to staging accessible to you at the end of each cycle.
Testing and pilot
Functional, integration (inventory, prices, orders), load and payment-security testing. Deliverable: a pilot with a group of real customers, adjustments from their feedback and a test report before the full launch.
Launch and evolution
Catalog migration, customer onboarding and training, controlled go-live and intensive support the first week. Deliverable: the portal in production, documentation and 90 days of support; then, improvements and new features based on real usage.
Tech stack
The tools and platforms we build it with — chosen for your problem, not for hype.
Frequently asked questions
Why custom and not Shopify or a marketplace?
Shopify and marketplaces handle simple catalogs and direct sales well, but fall short when you need per-customer pricing, commercial credit, deep ERP integration and zero commission per sale. If your operation is standard, we will tell you honestly: sometimes Shopify Plus B2B is the right call. A custom platform makes sense when your business rules (pricing, credit, integrations) do not fit a packaged solution.
Does it integrate with my ERP (SAP, Dynamics, CONTPAQi, Business One)?
Yes. We connect the portal to your ERP through middleware (SAP Integration Suite/CPI, MuleSoft or a custom one) to sync catalog, inventory, prices, orders and invoices. We never connect e-commerce directly to the ERP: the middleware absorbs format differences, handles errors and retries, and prevents a portal failure from affecting your ERP. We work with SAP ECC/S4HANA, Business One, Microsoft Dynamics and CONTPAQi.
How do payments and invoicing work in Mexico?
We integrate card via Stripe, Conekta, Mercado Pago or PayPal; SPEI transfer with a reference for automatic reconciliation; and commercial credit (30/60/90 days) validating the available line against your ERP before accepting the order. CFDI 4.0 invoicing is generated automatically via a certified PAC, with XML and PDF available in the customer portal.
Does the portal replace my sales team?
No: it transforms it. The portal frees your reps from taking repetitive orders so they can focus on new customers and strategic relationships. We recommend a gradual launch, keeping current channels (phone, WhatsApp) while customers adopt the portal. Adoption is not forced to 100%.
How do you handle security and card payments (PCI)?
We don't store card data on your platform: card payments are delegated to the gateway (Stripe, Conekta, Mercado Pago, PayPal), which carries the PCI DSS compliance burden, so your own compliance scope shrinks dramatically. The platform is built against the OWASP Top 10 with QA and vulnerability scanning from our internal ARIA platform, tightly scoped authentication and roles, and secrets (payment keys, PAC tokens) kept in a vault, never in code.
How much does it cost and how long does it take?
It depends on scope and integrations. In the factory we work with a fixed budget defined in Discovery — no hourly billing, no ambiguous scope. A B2B/B2C portal with ERP, payments and CFDI integration usually spans several months of development, with functional deliverables every 2 weeks so you see real progress from the start. We give you a closed number and timeline once Discovery is done.
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