            

                        const site = await build(spec);
                        await deploy(site, "production");
                        // Lighthouse: 97 performance
                        assert(googlebots.canCrawl(site));
                        ship(site).to("client");
                    

Web Development — Catania, Sicily

We write code that ships products. Not code that impresses other developers.

SliderDevs is a web development studio in Catania, Sicily. We build business websites, web applications, e-commerce platforms, and API systems using modern stacks — React, Next.js, Vue, Node.js, TypeScript. Every project is performance-first, SEO-ready, and engineered to convert visitors into customers. If it loads slow or breaks on mobile, it does not leave our workshop.

See our work Start a project

140+
Sites Shipped

97
Avg Lighthouse

€8.4M
Client Revenue

2.1s
Avg Load Time

A website is not a brochure. It is a machine. Every pixel either earns revenue or costs it. We build machines that earn.

What we build

Six development tracks. Each one staffed by engineers who ship production code every week.

Business Websites

Marketing sites, landing pages, corporate platforms — fast, responsive, SEO-optimised, and designed to convert. React, Next.js, or WordPress depending on your needs.

From €299.70 View → 02

Web Applications

Custom web apps — dashboards, SaaS products, internal tools, client portals. Full-stack: React/Vue frontend, Node.js/Python backend, PostgreSQL/MongoDB database.

From €599.70 View → 03

E-Commerce Development

Online stores that sell — Shopify, WooCommerce, or custom-built. Product catalogues, payment processing, inventory, shipping, and checkout flows engineered for conversion.

From €449.70 View → 04

API & Integrations

Custom APIs, third-party integrations, data pipelines, and system connections. REST, GraphQL, webhooks — making your systems talk to each other reliably.

From €349.70 View → 05

Performance Engineering

Speed audits, Core Web Vitals optimisation, infrastructure tuning, and load testing. Making slow sites fast and fast sites unbreakable.

From €199.70 View → 06

Maintenance & Support

Ongoing technical support, security updates, performance monitoring, content updates, and bug fixes. Because shipping is not the end — it is the beginning.

From €149.70 View →

Case studies

Shipped and measured.

Luxury hotel booking platform

Next.js · Stripe · PostgreSQL

+180% online bookings

Custom booking engine with real-time availability, dynamic pricing, and integrated payment processing. Mobile-first design. 1.8s load time. Organic traffic doubled in 4 months.

B2B SaaS dashboard

React · Node.js · MongoDB

12,000 daily active users

Multi-tenant analytics dashboard with role-based access, real-time data visualisation, and CSV/PDF export. Built to handle 50K concurrent connections.

Artisan e-commerce marketplace

Shopify · Custom theme · API

€1.2M first-year revenue

Custom Shopify theme with advanced product filtering, multi-currency checkout, and integrated shipping calculator. 3.8% conversion rate — double the industry average.

How we ship

Five phases. Zero surprises.

Spec

We define exactly what gets built — pages, features, integrations, timeline. No ambiguity. You get a written specification document before any code is written.

Architect

Database schema. API design. Component structure. Hosting architecture. We design the system before building it — because refactoring is always more expensive than planning.

Build

Iterative development with weekly demos. You see progress every 5 business days. Each sprint delivers working features you can test on a staging URL.

Test

Cross-browser testing (Chrome, Safari, Firefox, Edge). Device testing (12+ screen sizes). Performance testing (Lighthouse 90+). Accessibility audit. Load testing for apps.

Ship

Deployment to production. DNS configuration. SSL setup. Analytics verification. SEO validation. Then 30 days of included bug support.

Clients

After shipping.

"SliderDevs rebuilt our booking platform and online bookings increased 180%. Same marketing spend. Same pricing. The only variable was the website. Their performance engineering alone was worth the entire project fee — page speed went from 6 seconds to 1.8."

Marco R.

GM, Luxury Hotel Group, Sicily

"We needed a SaaS dashboard handling 12,000 daily users. SliderDevs built it in 10 weeks. Zero downtime since launch. When we needed to add real-time features 6 months later, the architecture they designed scaled without a rewrite. That is the difference between engineers and coders."

Laura T.

CTO, DataMetrics (Milan SaaS)

"€1.2 million in first-year revenue on a Shopify store they built. 3.8% conversion rate. The checkout flow they designed converts because they obsessed over every click, every trust signal, every loading state. This is engineering for business outcomes, not engineering for the sake of it."

Alessandro M.

Founder, Artisan Marketplace

Your website is either working for your business or working against it. Every single day.

Let us build one that works.

Start a build →