Websites and apps, engineered to perform.
Custom builds on modern stacks — static-first, accessible, and fast by default. From marketing sites to complex web applications.
Start a project →Wave18 provides custom web development for ambitious businesses across the UK and Europe: bespoke marketing and corporate sites on Astro or Next.js, managed WordPress builds when a CMS fits best, headless CMS builds on Strapi, Contentful and Sanity, web applications and dashboards, installable progressive web apps, and redesigns of legacy sites without losing SEO equity. Every build follows a static-first architecture that targets 95+ Lighthouse scores on every page and a typical 0.9s LCP at launch, is built to WCAG 2.2 AA and EAA-readiness with manual keyboard and screen-reader testing, and ships multilingual from day one across six languages — English, German, French, Spanish, Dutch and Italian — with proper hreflang. Projects start from a fixed price of £5,000 and are delivered by one accountable team, from scoping through build, with no hand-offs between agencies. The result is a website or web application engineered to perform from launch and to keep performing as the business behind it grows.
What we offer
Custom Websites
Bespoke marketing and corporate sites on Astro or Next.js.
WordPress
Managed, secure and fast WordPress when a CMS fits best.
Headless CMS
Strapi, Contentful and Sanity for content teams at scale.
Web Applications
Dashboards, portals and SaaS front-ends built to last.
Progressive Web Apps
Installable, offline-capable, app-like experiences.
Website Redesign
Modernise legacy sites without losing SEO equity.
Explore each capability
Custom websites
Bespoke marketing and corporate sites built static-first on Astro or Next.js, targeting a 95+ Lighthouse score on every page and a typical sub-1-second Largest Contentful Paint. No theme-store templates — the design system, components and content model are built for your brand and your content team.
WordPress
Managed, secure WordPress when a familiar CMS is the right fit — hardened, kept up to date, and tuned for Core Web Vitals rather than left to a pile of plugins. A good option when non-technical editors need full control of day-to-day content.
Headless CMS
Structured content on Strapi, Contentful or Sanity, delivered over an API to a fast static-first front end. One content source can feed a website, an app and other channels at once, and editors model content the way they actually work rather than around a theme.
Web applications
Dashboards, portals and SaaS front ends built on Next.js and React where a page is really software. Server-rendered or client-side where each genuinely fits, with the same accessibility and performance discipline as our marketing builds.
Progressive web apps
Installable, offline-capable experiences that behave like a native app — add to home screen, work on poor connections — while staying a normal, linkable, indexable website underneath. Useful where engagement or unreliable connectivity matters.
Website redesign
Modernising a legacy site without losing hard-won SEO equity: careful URL mapping and redirects, content migration, and a rebuild to WCAG 2.2 AA. A full redesign can also pull a site into immediate European Accessibility Act scope, so we build to that standard from the first wireframe.
Not sure whether WordPress or a headless CMS fits your team? Read our honest comparison →
Built right, the first time.
Performance by default
Static-first architecture and image optimization target 95+ Lighthouse across every page.
Accessible & compliant
WCAG 2.2 AA and EAA-ready, with manual keyboard and screen-reader testing.
Multilingual from the start
Six languages with hreflang and layouts that flex for longer copy.
One accountable team
No hand-offs — the people who scope it build it.
Speed and accessibility aren't a phase we get to later — they ship on every build.
Available across the UK — Web Development near you or browse Web Development services by city.
Frequently asked
By industry
Multilingual storefronts for retail, built to survive a spike.
Static-first, multilingual web builds for retail brands — 95+ Lighthouse, WCAG 2.2 AA, six languages with hreflang, from £5,000.
SaaS & TechnologyMarketing sites and docs that scale with your release cycle.
Static-first marketing sites, docs and dashboards for SaaS companies — headless CMS, 95+ Lighthouse, Next.js apps, from £5,000.
Manufacturing & IndustrialStructured catalogues for complex, long-cycle B2B sales.
Headless CMS catalogue sites for manufacturers — complex product data modelled cleanly, static-first speed, from £5,000.