Web Engineering
Marketing surfaces engineered for speed and conversion.
In short
Web engineering is the design and build of fast, conversion-focused websites and web applications. Offsage builds landing pages, marketing sites, e-commerce storefronts, and internal tools on Next.js 16, React 19, TypeScript, and Tailwind CSS v4, with GSAP-driven motion systems. Core Web Vitals and server-side rendering are treated as build requirements rather than post-launch optimisations. Landing pages start at $2,500, marketing websites at $7,500, and custom SaaS MVPs at $25,000.
How this works
Most agencies pick a lane. We keep five, and staff all of them with the same founder who scoped the work — so a site that needs automation wired in does not get handed to a different vendor afterwards.
Every build ships statically rendered with a complete SEO baseline: semantic headings, canonical URLs, JSON-LD structured data, and an llms.txt file for AI answer engines.
What we build
- Next.js 16 builds
- React Server Components
- Mobile-first responsive design
- Conversion-optimised layouts
- Ecommerce storefronts
- Measured animation systems
Typical stack
- Next.js 16
- React 19
- TypeScript
- Tailwind CSS v4
- GSAP
- Vercel
Indicative pricing
Directional starting points, not ceilings. Final scope is agreed after a free 30-minute strategy call.
Landing page
Single high-performance marketing page built on Next.js, including a measured animation system and an SEO baseline. One to two week delivery.
From $2,500
Marketing website
Five to ten page site with optional CMS, full SEO setup, and analytics instrumentation. Three to six week delivery.
From $7,500
E-commerce platform
Shopify, custom Next.js storefront, or headless commerce build. Four to eight week delivery.
From $12,000
See all pricing ranges across every vertical, including retainers and terms.
Questions on web engineering
Next.js 16 with React 19 and TypeScript, styled with Tailwind CSS v4, animated with GSAP and ScrollTrigger, and deployed on Vercel. Data work uses PostgreSQL with Prisma. Offsage uses Next.js 16 specifically because of its server component model, which keeps the JavaScript shipped to the browser small.
A landing page starts at $2,500 and takes one to two weeks. A five to ten page marketing website starts at $7,500 and takes three to six weeks. Pricing depends on design depth, CMS requirements, and the number of integrations, and is finalised as a written scope after a free 30-minute strategy call.
Yes. Core Web Vitals are treated as a build requirement rather than a post-launch optimisation. Every site ships statically rendered with server-side content, optimised fonts, and responsive images so the Largest Contentful Paint and Cumulative Layout Shift budgets are met before launch, not audited afterwards.
Yes. Offsage can build to an existing brand system or design language, and can also propose one. If a design system already exists we work inside it rather than replacing it. Where motion is involved the system is built with reduced-motion fallbacks so accessibility is not traded away for animation.
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