E-commerce Development
Custom e-commerce development for businesses seeking to stand out with a unique shopping experience. Optimized design for conversion, advanced integrations, and guaranteed performance during peak traffic periods.
More than 200 projects and 12 years of experience
Our unique system combined with AI delivers faster results.
Oriol Lanuza
DeveloperLas plataformas estándar funcionan hasta que necesitas reglas de negocio complejas. Mi trabajo empieza donde Shopify se queda corto: integrando tu ERP bidireccionalmente y asegurando que tu stock multicanal cuadre al milímetro, incluso durante un Black Friday.
Trusted Partner of Sortlist
5-star rating on Google
E-commerce that Converts Visits into Sales
Does your online store need to differentiate itself from the competition?
Personalized shopping experience. Smart shopping cart that reduces abandonment. Real-time inventory synchronization across your online store, physical store, and marketplaces. Loyalty programs that encourage repeat purchases. Automatic abandoned cart recovery. If your business needs this, standard e-commerce solutions fall short.
We specialize in custom e-commerce development for businesses that want to offer a superior shopping experience . Online stores that need to stand out with unique e-commerce design and specific functionalities. Retailers with multichannel inventory that must be perfectly synchronized. Businesses with sophisticated promotional and discount strategies. The e-commerce design and development we do isn't for those looking for a generic template: it's for those who need their online store to function exactly as their business strategy requires.
From Concept to First Sales
Our online store development process begins with understanding your business model and sales goals, not with choosing a template. Every technical decision is designed to maximize your conversion rate (CRO) .
Business Model Analysis
We analyze your business strategy, target audience, product catalog, and sales channels. We identify what your custom e-commerce platform needs to stand out and convert better than the competition.
Shopping Experience Design (UX/UI)
Conversion-focused (CRO) ecommerce design : optimized purchase flows, product pages that generate desire, and a simplified checkout process that reduces abandonment. Perfectly responsive design for mobile devices, where 70% of visits occur.
Architecture and Integrations
We define ERP/CRM integrations from the ground up. Connection with your management system, email marketing tools, analytics platforms, and marketplaces. Complete automation so you can focus on selling.
Iterative Development
We build your online store in cycles. Each iteration is functional and testable. You see real progress, not presentations. Continuous feedback to adjust as needed.
Payment and Logistics Setup
We implement payment gateways that maximize conversion: credit card, PayPal, Bizum, Apple Pay, Google Pay, and deferred payment. We also integrate with logistics providers and offer automatic shipping cost calculation.
Launch and Optimization
We deploy with load testing to ensure stability during traffic peaks . We monitor conversion metrics from day one and continuously optimize: A/B testing, funnel analysis, and incremental improvements.
Why Mecexis for your E-commerce Development
Specialists in online stores that actually sell
Anyone can develop a basic online store . We create shopping experiences that turn visitors into repeat customers.
Our competitive advantage lies in results-driven ecommerce design . We don't create beautiful stores that don't sell: every element is designed to maximize conversion rate optimization (CRO) . We've optimized checkouts, reducing abandonment rates from 70% to 35%. We've implemented recommendation systems that increase the average order value by 40%. We've designed mobile experiences that convert just as well as desktop.
Custom integrations are our specialty. We connect your e-commerce platform with email marketing tools to automate abandoned cart recovery. We synchronize multichannel inventory across your online store, physical store, and marketplaces in real time. We implement analytics systems that show you exactly where you're losing sales.
The custom e-commerce platform we develop can handle traffic spikes because we build it with scalability in mind. We develop it on Django, the same framework used by platforms with millions of daily transactions. Your store will function perfectly during Black Friday, massive advertising campaigns, or viral social media events.
Online store development includes technical SEO optimization from the start. User-friendly URLs, optimized loading speed, and structured content for Google. Your e-commerce site will be ready to rank from launch.
Frequently Asked Questions
Answers to the most common questions about custom e-commerce design and development .
Everything You Need to Know Before You Start
- 1
When do I need a custom ecommerce platform instead of Shopify or PrestaShop?
When you're looking to stand out with a unique shopping experience , you need a fully customized ecommerce design , specific functionalities that standard platforms don't offer, or advanced ERP/CRM integration . If your business model is different or you want complete control over your store, you need custom ecommerce development . This is also true when you project high sales volume and need performance guarantees.
- 2
How much does it cost to develop a custom online store?
Custom ecommerce development starts at €25,000 for projects with basic functionalities and a personalized ecommerce design . Stores with ERP/CRM integration , advanced conversion rate optimization (CRO) features, and multichannel inventory management typically range from €40,000 to €100,000. We'll provide you with a fixed price quote after analyzing your needs.
- 3
Which payment gateways do you recommend?
We implement the payment gateways that work best for your industry: Stripe and Redsys for cards, PayPal for trust, Bizum for fast mobile payments, and Apple Pay and Google Pay for express checkout. We also offer deferred payments with Klarna or similar services if your average order value justifies it. We choose based on your target audience and optimize to maximize conversion .
- 4
How do you manage multichannel stock?
We implement real-time , multi-channel stock synchronization: your e-commerce site , physical store, Amazon, eBay, and other marketplaces share the same information. Every sale automatically updates inventory across all channels, preventing overselling and eliminating the need for manual management.
- 5
Will the store be able to handle traffic spikes during campaigns?
Yes. The online store development we do is designed to handle traffic spikes . We conduct load tests simulating thousands of concurrent users before launch. We deploy on cloud infrastructure that automatically scales. Your e-commerce site will withstand Black Friday, massive advertising campaigns, or viral marketing.
- 6
Does it include mobile optimization?
Yes. 70% of ecommerce traffic is mobile. Our ecommerce design is responsive with a shopping experience optimized specifically for mobile: touch navigation, simplified forms, fast checkout, and images optimized for slow connections. We test on all devices before launch.
- 7
Do you offer post-launch support and optimization?
Yes. Custom e-commerce requires continuous improvement: conversion rate optimization (CRO) through A/B testing, security updates, new features, metrics analysis, and adjustments based on user behavior. We offer maintenance contracts with different levels of support.
- 8
Can you migrate my current store without losing data or SEO?
Yes. We migrate your entire catalog, customers, order history, ratings, and content. We maintain URLs to preserve your SEO or implement proper 301 redirects. We plan the migration to minimize downtime and ensure an improved shopping experience on the new platform.