Performance is a feature
Web application performance is a revenue variable, not a vanity metric. Slow interfaces lose users at every step of the funnel, and since Core Web Vitals became a ranking input, they lose search visibility as well.
We build to performance budgets agreed at the start — a ceiling on JavaScript, an image strategy, a target for Largest Contentful Paint and Interaction to Next Paint. Budgets are enforced in CI, so a regression fails the build rather than shipping quietly.
- Performance budgets enforced in continuous integration
- Server rendering by default so content is crawlable
- Image optimisation, modern formats and correct sizing
- Accessibility to WCAG 2.2 AA as a build requirement
- Core Web Vitals monitored on real users after launch
Built to be found
A large share of the web applications we are asked to rescue were built as client-rendered single-page apps with no server-rendered content, no meaningful heading structure and no structured data. They work for logged-in users and are effectively invisible in search.
We server-render content that should be indexed, implement structured data properly, and treat the marketing surface of the product as a first-class part of the build rather than a page someone adds later.
AI features that feel considered
AI in a web interface introduces problems that conventional UI patterns do not solve — responses take seconds, output is non-deterministic, and users need to know how much to trust what they are reading.
We use streaming so output appears immediately, inline citations so claims are checkable, visible confidence and refusal states, and undo paths on anything the AI changes. These patterns are what separate an AI feature people use from one they try once.
What you receive
- Production web application with CI/CD
- Performance budgets enforced in the pipeline
- Server-rendered, crawlable content with structured data
- WCAG 2.2 AA accessibility compliance
- Real-user monitoring for Core Web Vitals
Technologies we use
Web App Development — frequently asked questions
How much does web app development cost?
A focused web application typically runs $25K to $60K. Larger platforms with complex permissions, multiple integrations and admin tooling range from $70K to $160K. We quote fixed scope after discovery.
Why Next.js rather than a plain React SPA?
Server rendering, which matters for both search visibility and first-load performance. A client-rendered SPA ships a blank page and a large JavaScript bundle before anything appears, which is acceptable behind a login and damaging on any page you want indexed.
Can you improve an existing web app?
Yes. We run a technical audit covering performance, accessibility, SEO and code health, then propose staged improvements ordered by impact against effort. Performance and crawlability work usually delivers the fastest measurable return.
Do you handle hosting and deployment?
We set up the deployment pipeline and infrastructure, typically on Vercel or AWS, under your own accounts so you retain control and billing. We can manage it on a retainer or hand over entirely to your team.
Is SEO included?
Technical SEO is part of the build — server rendering, semantic markup, structured data, sitemaps, canonical handling and Core Web Vitals. Content strategy and link acquisition are separate engagements, but the foundation is built correctly by default.
Talk through your web app development project
A free 30-minute call with an engineer — not a salesperson. You leave with a scope, a cost range and an honest view of the risks.
Book a free strategy call
