Build
Connect & operate
Design & teams
Start hereScope a build in one callBring a spec, a wireframe, or a paragraph. You leave with an architecture, a timeline, and a number.Book a scoping call
AI software
LLM & data systems
Vibe coding
Ready to ship?Put AI where the work isAgents, RAG, and private LLMs wired into the systems your team already uses — not a chatbot bolted to a homepage.Discuss an AI project
Domain firstWe learn your workflow before we model itRegulated, operational, or high-volume — the constraints belong in the schema, not in a training doc.Talk about your domain
Plan smarterEstimate before you commitCost ranges, scope templates, and the questions we ask in discovery — free, no form.Open the cost calculator
Real conversationsTalk with a technical leadNo SDR, no discovery gauntlet. The person on the call is the one who scopes the build.Book a call
Web development company

Web development company
for sites that have to perform.

DEV.co designs and builds custom websites, web applications, and online stores that load fast, rank well, and turn visitors into customers. Senior US engineers, a fixed scope agreed up front, and a codebase you own from the first commit.

Scope your website Web development services
Fixed scope, agreed up frontCore Web Vitals targetsYou own the code

12+

Years building for the web

Founded 2013

390+

Projects shipped

Websites, web apps, SaaS

4–12 wks

Typical custom build

Kickoff to launch

100%

Code ownership

Your repo from day one

Web development services

Everything your website needs, from one team.

Most web projects fail in the gaps between vendors — the designer, the developer, the host, and the SEO agency each doing their part and nobody owning the result. We cover the whole path, so there are no gaps to fall into.

What every site we build gets right

Five standards, on every project.

A website is judged in seconds and ranked on signals most visitors never see. These are the standards every DEV.co build is held to before it ships.

01

Built to rank

Search visibility is decided long before launch — by how pages render, how they are structured, and how fast they load. We build it in rather than bolting it on.

  • Server-rendered HTML that search engines and AI crawlers can read without running JavaScript
  • Clean URL structure, XML sitemaps, canonical tags, and structured data (schema.org) on every template
  • Redirect maps and parity checks on every migration, so a redesign never costs you rankings
  • Search Console and analytics wired up before launch day, not after
02

Fast on every device

Most of your traffic is on a phone, and Google ranks the mobile version of your site. We set performance budgets against Core Web Vitals and test against them on real devices.

  • Targets of LCP under 2.5s, INP under 200ms, and CLS under 0.1 — Google's own “good” thresholds
  • Responsive layouts designed mobile-first, then scaled up
  • Modern image formats, responsive sizes, and lazy loading below the fold
  • Edge caching and a CDN so pages are served close to every visitor
03

Accessible by default

An accessible site reaches more people, converts better, and lowers legal risk. We build to WCAG 2.2 AA and test with the tools assistive-technology users actually rely on.

  • Semantic HTML, keyboard navigation, and visible focus states on every component
  • Colour contrast checked in both light and dark themes
  • Screen-reader testing on key flows — navigation, forms, and checkout
04

Secure from the first commit

Websites are the front door to your data. We design against the OWASP Top 10 and treat security as part of the build, not a pre-launch scan.

  • Protection against injection, cross-site scripting, and request forgery by construction
  • HTTPS everywhere, security headers, and least-privilege access to every system
  • Dependency monitoring and patching, with SSO and audit logging where you need them
05

Designed to convert

A beautiful site that doesn't generate leads is a brochure. Every page has a job, and we measure whether it does it.

  • One clear primary action per page, with copy that says exactly what happens next
  • Forms that are short, fast, and routed to your CRM
  • Event tracking and A/B testing so decisions come from data, not opinion

How we work

From first call to launch in five steps.

  1. 01

    Discover

    Week 1

    Goals, audience, content, and integrations. You leave with a scope, a sitemap, and a fixed plan.

  2. 02

    Design

    Weeks 2–4

    Wireframes, then a component-based design system in Figma, reviewed with you at every step.

  3. 03

    Build

    Weeks 3–10

    Sprints that ship to a live preview URL, so you see working pages — not status reports.

  4. 04

    Launch

    Final week

    Content migration, redirects, performance and accessibility checks, then a monitored go-live.

  5. 05

    Support

    Ongoing

    Hosting, updates, and improvements on a monthly plan — or a clean handover to your team.

Choosing a platform

The right platform for your site.

We don't push one stack. Here is how the options compare — and we'll tell you which one fits on the first call.

PlatformBest forYou own the codeWho edits content
Next.js (custom)Marketing sites and web apps that need speed, SEO, and room to growYes — code and infrastructureDevelopers, with a headless CMS for content
WordPressContent-heavy sites where editors already know the adminYesYour marketing team
Headless CMSContent that feeds a website, an app, and other channels at onceYesYour marketing team
Shopify / headless ShopifyOnline stores, from a themed launch to a fully custom storefrontStore on Shopify; storefront code is yoursYour merchandising team
WebflowDesign-led marketing sites a small team wants to edit visuallyContent yes; platform hostedYour design or marketing team

Go deeper: Next.js development · WordPress development · Shopify development · Webflow development · CMS development

What our clients say

Fast, responsive, and always on.

“Killer front-end design, great responsiveness to my specific requests on the project. Couldn't ask for more.”
Manny ArceFlorida Personal Injury Attorney
“You guys rock! Seriously, the speed, quality and affordability of your services is hands-down the best we have ever dealt with. We will be coming back again and again.”
Marnie WoodsonNGU Sports Lighting
“I really appreciate how quickly the dev team responds to and completes the requested tasks for our projects. Communication matters greatly to us and they are 'always on'.”
Douglas MassiUnited Final Expense Services

FAQ

Web development questions, answered.

What businesses ask us before they start a website project.

A web development company designs, builds, launches, and maintains websites and web applications. At DEV.co that covers the whole path: discovery and planning, UX and visual design, front-end and back-end engineering, content migration, SEO and performance work, hosting, and ongoing support — delivered by one team rather than a chain of vendors.

Tell us about the website you need.

A senior engineer will reply within one business day with questions, a recommended platform, and a realistic timeline — not a sales sequence.