By a former BigCommerce Solutions Engineer

B2C & B2B eCommerce built by someone who was on the other side.

We design, build and maintain online stores that sell — from theme and checkout to integrations and ongoing support. No agencies that vanish after launch.

Platforms we know inside out BigCommerce Shopify Headless / MACH WordPress / Woo
12+
years in eCommerce & SaaS, LATAM and US
Ex-BC
Solutions Engineer at BigCommerce
B2C·B2B
storefronts, catalogs & wholesale portals
100%
direct support, no middlemen

Everything your store needs, end to end

We don't just ship a pretty site. We build your full eCommerce operation and keep it growing.

Custom design & themes

Stencil themes (BigCommerce), Liquid (Shopify) or headless frontends with Next.js. On-brand, fast and built to convert.

Integrations & APIs

ERP, inventory, invoicing, payment gateways (Stripe, MercadoPago), shipping and real-time sync via REST/GraphQL.

B2B & wholesale

Price lists, customer groups, quotes, account-based ordering and purchasing portals for distributors and wholesalers.

Migrations without losing sales

From Woo, Magento or legacy carts to BigCommerce or Shopify. Data, SEO and redirects handled so you keep your rankings.

Optimization & conversion

Speed, checkout, analytics (GA4/GTM) and experiments. Data-driven decisions to sell more with the same traffic.

Maintenance & support

Monthly plans: monitoring, improvements, new features and direct response. Your store isn't left alone after launch.

Built by someone who sold the platform, not just used it

I worked inside BigCommerce as a Solutions Engineer: technical demos, account retention and solving the real problems merchants hit. That perspective changes how a store gets built.

I know the platform from the insideAPI limits, best practices and tricks that aren't in the public docs.
Technical + commercialI understand architecture and write the code, but I also speak the language of business and sales.
Direct, no layersYou talk to the person who builds it. No account managers relaying messages or tickets getting lost.
LATAM and USProjects in Spanish and English, with context on both markets, payments and logistics.
Founder · Solutions Engineer

JP Guzmán

Ex-BigCommerce · 12+ years in eCommerce

I've been on all three sides of eCommerce: the vendor (BigCommerce), the agency (Gran Comercio) and the product. My zone is where business meets implementation — I design the flow, write the integration and answer when something breaks.

BigCommerce Stencil Shopify Headless / MACH Next.js REST · GraphQL Stripe · MercadoPago .NET / Node

adrian.com.mx — streetwear on BigCommerce

Fashion retail · BigCommerce
"Custom theme, real-time inventory sync and a store that holds up through drops without crashing."
A
adrian.com.mxStreetwear brand · Colima, Mexico
Custom theme
Stencil tailored to the brand
.NET sync
Real-time inventory via API
+10 widgets
custom functionality on the store

From idea to sale, no surprises

01

Discovery

We understand your business, catalog and operation. We define scope and the right platform.

02

Design & build

Theme, product pages, checkout and integrations. Reviewable progress, not a black box.

03

Launch

Data migration, SEO, testing and a careful go-live. No lost sales or rankings.

04

Growth

Ongoing support, improvements and new features month over month. The store evolves with you.

Part of a group of tech companies

Gran Comercio is the specialized eCommerce division. When a project needs artificial intelligence or automation, we solve it together with NodoLab — no outsourcing to third parties.

GC

Gran Comercio

grancomercio.mx · eCommerce

Design, build and maintenance of B2C and B2B stores. BigCommerce, Shopify, headless and migrations. You're here.

NL

NodoLab

nodolab.ai · AI & automation

Software powered by artificial intelligence: apps, multi-tenant CRMs, WhatsApp automation and agents. The group's AI division.

What you usually want to know

Do you only work with BigCommerce? +

No. BigCommerce is where we go deepest thanks to direct experience, but we also build on Shopify, headless frontends with Next.js and stores on WordPress/WooCommerce. We recommend the platform that serves your business best, not the one that's easiest for us.

Do you build B2B / wholesale stores? +

Yes. Per-customer price lists, groups, quotes, account-based ordering and purchasing portals for distributors. B2B is one of our specialties.

What happens after launch? +

We offer monthly maintenance plans: monitoring, improvements, new features and direct support. The store isn't abandoned — it keeps growing with your business.

Do you work with clients outside Mexico? +

Yes. We operate in Spanish and English, with projects across LATAM and the United States. We handle payments, taxes and logistics context for both markets.

How do we start? +

Message us on WhatsApp with a short description of your project. We schedule a discovery call, define scope and send you a clear proposal with timeline and pricing.

Ready for a store that actually sells?

Tell us about your project. We reply directly — no endless forms, no sales reps in between.

Message us on WhatsApp