Web Development · Engineering Performance

Web development for websites that load instantly
and convert consistently.

We build landing pages, eCommerce and web apps with Core Web Vitals 100/100 garantat contractual. Stack modern, design conversion-first, securitate enterprise.

100/100
CWV Score
<1s
TTFB Mediu
180+
Site-uri
99.99%
Uptime
Case Studies →
✓ 100/100 CWV guaranteed✓ Enterprise-grade security✓ 24/7 hosting & support
pagespeed.danco.dev● LIVE
Test your site:
Your site (now)
With Danco Vision
0
Performance
0
Accessibility
0
Best Practices
0
SEO
100
Performance
100
Accessibility
100
Best Practices
100
SEO
LCP
<2.5s
INP
<200ms
CLS
<0.1
What this means for business
+1s speed = +27% conversion rate. Sites with 90+ CWV convert 2.4× better on average.

Modern technology for fast, secure, and easily scalable websites.

Next.js 15◆React Server Components◆Edge Runtime◆Shopify Plus◆WooCommerce◆Headless WordPress◆Sanity CMS◆Strapi◆Cloudflare Workers◆Vercel◆Core Web Vitals 100◆TypeScript◆Tailwind◆CRO Engineering◆A/B Testing◆Hotjar◆99.99% Uptime◆Next.js 15◆React Server Components◆Edge Runtime◆Shopify Plus◆WooCommerce◆Headless WordPress◆Sanity CMS◆Strapi◆Cloudflare Workers◆Vercel◆Core Web Vitals 100◆TypeScript◆Tailwind◆CRO Engineering◆A/B Testing◆Hotjar◆99.99% Uptime◆
What We Build

From landing page
to SaaS at scale.

Landing Pages

Surgical conversion pages

For Google Ads, Meta campaigns or launches. Optimized for a single goal: conversion. Built on Next.js or Astro for maximum speed.

Squeeze pagesLead captureProduct launchesWebinar sign-upsLong-form sales
Explore Landing Pages →
Typical timeline
5-10 days
Investment
from 2,500 EUR
fixed scope · custom quote
Our Stack

Technologies we
le master deeply

We don't pick technologies just because they're trendy. We work with mature, scalable stacks backed by solid development ecosystems. Every technology decision is made based on real business impact.

Frontend
Next.js 15
React Server Components, Edge Runtime
Astro
For content-heavy sites with zero JS
Tailwind + shadcn
Reusable design system
TypeScript strict
Zero runtime errors in production
Backend & Data
tRPC + Postgres
End-to-end type-safe API
Prisma / Drizzle
Safe migrations, zero downtime
Redis + queues
Background jobs, rate limiting
Stripe / Mollie
Payments with tax compliance
CMS & Headless
Sanity / Strapi
Non-technical editors, custom schema
Shopify Plus
For eCommerce at scale
Contentful
Multi-channel content delivery
Markdown + Git
For fast blogs
Infra & Performance
Vercel / Cloudflare
Edge deploy in 300+ locations
Cloudflare R2 / S3
Optimized media storage
Sentry + LogRocket
Error tracking + session replay
Lighthouse CI
CWV tested on every deploy
What You Get

The process, from brief to launch

01
◎

Discovery & Strategy

A 1-2 day workshop with your team. Business goals, audience, competitors, KPIs. Output: technical brief + wireframes.

02
◈

Conversion-First Design

Figma with a proprietary design system, every element justified by a UX/CRO principle. Iterations until approval.

03
◉

Sprint-Based Development

Development in 2-week stages, with weekly live demos and the chance to see every change before it goes live.

04
⬡

QA & Performance

Cross-browser, mobile, accessibility. Integrated Lighthouse CI. The site doesn't ship without 90+ CWV on every page.

05
◐

Launch & Migration

Zero-downtime migrations, complete redirect maps, cutover plan. SEO 100% preserved. Monitoring in the first week.

06
◬

Support & Growth

24/7 SLA for critical issues. Continuous CRO based on real data (heatmaps, recordings, A/B). Proactive maintenance.

0/100
Average CWV delivered
across all pages
0+
Websites built
since 2006
0.99%
Uptime guaranteed
contractual SLA
0%
Average reduction checkout abandonment
eCom redesign
FAQ

Questions about Web Development

Landing page: 5-10 business days. Corporate site: 4-8 weeks. eCommerce: 6-12 weeks. Web app: 8-20 weeks. Timeline depends on content complexity, integrations, and design iterations.

A contractual guarantee that at launch your site will score at least 90 on all 4 Lighthouse pillars (Performance, Accessibility, Best Practices, SEO). If it doesn't, you don't pay the final installment until we fix it.

Landing page from 2,500 EUR. Corporate site from 6,500 EUR. eCommerce from 9,500 EUR. Web app from 18,000 EUR. We don't take on projects under 2,500 EUR; discovery and design costs would consume most of the budget.

Yes. Complete URL audit, 1-to-1 redirect map, preserved meta tags, schema markup, and internal structure. We monitor Google Search Console for the first month. Average traffic loss: <2% (better than most agencies).

Sanity (preferred for custom sites), Strapi (self-hosted), Shopify Plus (eCommerce), headless WordPress (when there's a familiar team). All with role-based access and live preview.

Yes. Hosting on Vercel / Cloudflare with 99.99% uptime. Support packages from 480 EUR/month (maintenance + security) to 1,800 EUR/month (continuous CRO + incremental development). Quarterly security audit included.

Free Technical Audit

How many conversions do you lose to a slow website?

Complete audit: Lighthouse, code structure, security, technical SEO, accessibility. Delivered in 48h, no strings attached.

✓
Lighthouse score on 5 key pages
✓
Performance bottleneck identification
✓
Security audit (headers, known vulnerabilities)
✓
Prioritised recommendations with estimated impact