Web apps that load fast.
Web application development in Next.js and React. Fast, findable, fixed price.
-
Senior engineers
No juniors. No middlemen.
-
Fixed price
Overruns are on us.
-
Live in weeks
Weekly demos on staging.
-
You own the code
100% of the IP, day one.
Yarify provides web application development with Next.js, React and TypeScript, backed by Node.js, Java Spring Boot or Python APIs. We build customer apps, sales platforms, booking flows and portals, with server rendering, Core Web Vitals and technical SEO designed in from day one. Fixed-scope projects get one fixed written quote; our estimation overruns are our cost. Past work includes a sales platform for a 62-floor residential tower, delivered in 6 weeks.
Built in, not bolted on
-
Fast first load
Core Web Vitals by design
-
SEO-ready
URLs, metadata, structured data
-
Mobile first
Works on every screen
-
Multilingual
Hreflang done right
-
Your hosting
Your code, your account
Web applications we build
-
Sales platforms
Listings, configurators and enquiry flows that turn visitors into leads.
-
Booking and ordering
Availability, payments and confirmations without phone tag.
-
Customer portals
Accounts, documents, status and self-service for your clients.
-
Dashboards
Data from your systems, readable by the people who need it.
SEO-ready architecture, by default
- Server-rendered or static pages search engines can read
- Clean URLs and one canonical per page
- Structured data and XML sitemaps
- Every old URL redirected in one hop on relaunch
- Images in AVIF and WebP with set dimensions
- Accessible markup and keyboard navigation
How we build a web application
-
Free call · Day 1
What the app must do, and for whom.
-
Scope, URLs and fixed quote · Week 1
Pages, flows, URL plan and one price.
-
Design system and first build · Early weeks
Components and a staging URL early.
-
Build with weekly demos · Weekly
Real content, real data, every week.
-
Launch · Launch
Redirects, performance and search checks, then go live.
Fixed price. We eat the overruns.
The quoted price for the agreed written scope is the price you pay. If our estimate was wrong, the extra hours are our cost. Changes you request are scoped and quoted separately before work starts.
Fixed price vs time and materialsThe usual web app vs ours
The usual build
- Heavy client-side app, slow first load
- SEO left for “after launch”
- Old URLs broken on relaunch
- Hosted on the agency’s account
Yarify web app
- Server-rendered where it matters
- Search built into the architecture
- Every old URL mapped to a 301
- Deployed to hosting in your name
Web apps we have shipped
-
Selling 576 Homes Before the Tower Exists
Off-plan sales platform for a 62-floor, 576-residence tower. Next.js and GSAP, five-step buyer journey, mobile-first, live in six weeks.
-
Zero Web Presence to +300% Organic Clicks
Next.js website and local SEO for a regional law firm starting from nothing. Live in under 3 weeks, four schema types, organic clicks up 300% in the first quarter.
-
Osvita Poland: Admissions Made Clear
Ukrainian-first, mobile-first admissions site for a study-abroad consultancy. Five-step process, consultation form above the fold, Next.js and TypeScript, live in four weeks.
Questions buyers ask us
What is web application development?
Building interactive software that runs in the browser: account areas, booking flows, dashboards, portals and sales platforms. Unlike a brochure site, a web app has logic, data and logged-in users. With Next.js the public pages and the app can share one codebase.
Why do you use Next.js for web applications?
Next.js lets us choose per page whether to render on the server, generate statically or run in the browser. That means fast first loads, good Core Web Vitals and content search engines can read. Its large hiring pool keeps your app easy to maintain. See Next.js developers.
Will my new web app hurt my Google rankings?
Not if the migration is planned. Most losses come from broken URLs and missing content after a relaunch. We map every old URL to its new equivalent with one 301 redirect, keep content that ranks, and check sitemaps and structured data before launch.
How long does it take to build a web application?
It depends on scope. A focused sales platform can be fast: we delivered one for a 62-floor residential tower in 6 weeks. Multi-role portals with many integrations take longer. The written quote includes a realistic timeline.
Do you also do SEO?
We build technical SEO into the architecture: rendering, URLs, metadata, structured data, sitemaps, performance and redirects. For a law firm site we built, organic clicks grew 300% in the first quarter. Ongoing content marketing is best left to your team or a specialist.
Do we own the code and the hosting?
Yes. Code lives in your repository and deploys to hosting in your name. You own 100% of the code and IP, with documentation so any competent React or Next.js developer can continue.
Keep reading
-
Web app development cost
What a web application costs to build in 2026: indicative hours by complexity, cost at different regional rates, what drives the price, running costs and an illustrative example.
-
Vue developers
Senior Vue engineers for Vue 3 and Nuxt apps, Pinia state and Vue 2 migrations. Clean composables, typed components and tests. Join your team monthly or take a fixed-price project.
-
Next.js developers
Senior Next.js engineers for App Router builds, Pages Router migrations, caching and SEO fixes, Stripe and auth. Join your team monthly or own a fixed-price build.
-
Selling 576 Homes Before the Tower Exists
Off-plan sales platform for a 62-floor, 576-residence tower. Next.js and GSAP, five-step buyer journey, mobile-first, live in six weeks.
-
Real estate
Sales platforms for new developments, listing search, CRM and portal integrations, and AI staging tools for developers, agencies and proptech companies.
-
SaaS development
SaaS products built on solid foundations: multi-tenancy, Stripe subscriptions, auth and roles, admin dashboards and product analytics. Fixed quote for the first version.
Fast for users. Readable for search. Yours to keep.
Tell us what the app must do. You get a written scope, a URL plan and one fixed price.