Senior Frontend App Development AgencyFrontend App
We build polished frontends with React, Vue.js, and Next.js. Your users get a fast, accessible interface in 8-12 weeks.
IRPR is a senior frontend app development agency that builds interfaces in React, Vue.js, Next.js, and Svelte. Every developer has 8+ years of experience and has shipped production apps handling 100K+ monthly users.
We deliver a working frontend in 12-14 weeks with a fixed price starting at $80K. Our process includes design system creation, component library setup, accessibility audits (WCAG 2.1 AA), and performance budgets under 2-second load times.
CTOs hire us when their in-house team lacks senior frontend capacity. Founders use us to validate SaaS MVPs with real UI. Product managers bring us in to rebuild legacy interfaces that hurt conversion rates.
Types of software we ship.
SaaS dashboard frontend
Admin panels, analytics views, and user management screens built with React and Recharts or D3.js for data visualization.
Ecommerce storefront UI
Product catalogs, cart flows, and checkout pages with Next.js and Stripe integration. Supports SSR for SEO.
Mobile-first web app
Responsive PWAs built with React Native for Web or Vue.js + Ionic. Works offline with service workers.
Enterprise portal frontend
Internal tools and B2B portals with role-based access, real-time notifications via WebSockets, and SSO (Okta, Auth0).
Landing page and marketing site
High-conversion, SEO-optimized pages using Next.js static generation and Tailwind CSS. Ships with A/B testing via Vercel.
Design system and component library
Reusable component sets with Storybook, design tokens, responsive breakpoints, and dark mode support.
Real-time collaboration app
Whiteboarding, chat, or document editing interfaces using Liveblocks, Yjs, or WebSocket sync. Handles 50+ concurrent users.
Data-heavy dashboard
Large dataset views with virtual scrolling (react-window), charting libraries (ECharts, Nivo), and export to PDF/CSV.
We build for every business type.
SaaS companies
Ecommerce and retail
Healthcare and healthtech
Fintech and finance
Edtech and training
Why a senior frontend app development agency matters
A junior developer can ship a button. A senior team ships a system that scales to 100K users.
Generic dev shops often outsource frontend work to offshore teams with limited React or Vue.js experience. The result is slow pages, broken states, and code no one wants to maintain. IRPR assigns only senior engineers who have built and maintained production frontends for companies in New York, London, and San Francisco.
Our developers know how to optimize Core Web Vitals, handle state management with Redux Toolkit or Zustand, and set up automated visual regression testing with Chromatic. Every project ships with a performance budget: first contentful paint under 1 second, time to interactive under 2.5 seconds.
Generic frontend shop vs IRPR
The difference shows in the first deploy.
Most agencies assign mid-level devs who copy-paste from Stack Overflow. They skip testing, ignore accessibility, and write CSS that breaks on Safari. IRPR treats your frontend as a product, not a task list.
We audit your existing codebase, set up a component library, and enforce coding standards through ESLint, Prettier, and Husky. Every pull request requires 80% test coverage and passes Lighthouse audits at 90+.
- Junior or mid-level developers on the project
- No design system or style guide
- CSS written without a methodology (BEM, ITCSS)
- No automated visual regression tests
- Accessibility is an afterthought
- Manual deploys to a shared hosting
- Senior developers with 8+ years experience
- Design system with Storybook and design tokens
- Tailwind CSS or CSS Modules with a clear hierarchy
- Chromatic visual regression tests on every PR
- WCAG 2.1 AA compliance built in from day one
- Automated CI/CD pipeline via Vercel or Netlify
Our frontend development process
We follow a structured 4-phase workflow to eliminate guesswork.
Every project starts with a 2-week Roadmap phase. We audit your requirements, define user flows, choose the tech stack (React, Vue.js, or Svelte), and produce a fixed-scope proposal. You pay a flat fee of $8K for this phase.
After you approve the roadmap, we build the frontend in 2-week sprints. Each sprint ends with a deployable feature on a staging URL. You review, test, and give feedback. We ship production code in 8-12 weeks.
What ships with every frontend project
You get more than code. You get a production-ready system.
IRPR does not deliver a zip file. You get a fully deployed, documented, and monitored frontend application. Your team can take over immediately because we document everything.
Every project includes a README explaining the architecture, a component storybook, and a deployment guide. Your CI/CD pipeline runs on GitHub Actions and deploys automatically to staging and production.
- Source code in your private GitHub repo
- CI/CD pipeline via GitHub Actions to Vercel or Netlify
- Design system in Storybook with 30+ documented components
- Automated visual regression tests with Chromatic
- Jest and React Testing Library unit tests (80%+ coverage)
- Lighthouse performance report showing 90+ scores
- Sentry error tracking and performance monitoring
- Accessibility audit report with WCAG 2.1 AA compliance
- 1 month of post-launch bug fixes and support
What we ship in this practice.
SaaS analytics dashboard
Built a real-time analytics dashboard for a B2B SaaS company. Uses React, D3.js, WebSockets, and Node.js. Cut page load time from 4.2 seconds to 1.8 seconds and increased user engagement by 34%. Ships with Sentry error tracking and automated CI/CD.
Ecommerce store redesign
Rebuilt a Next.js storefront for a fashion brand doing $2M/year in online revenue. Integrated Stripe, Algolia search, and Shopify backend. Improved mobile conversion rate by 22% after reducing time to interactive from 5.1s to 2.3s.
Healthcare patient portal
Developed a HIPAA-compliant patient portal for a New York-based telemedicine startup. Uses React, TypeScript, and AWS Cognito for auth. Patients can book appointments, view lab results, and message providers. Achieved Lighthouse performance score of 96.
Fintech investment platform
Created a personal finance dashboard for a fintech startup. Uses React, Recharts, and Plaid API for account aggregation. Supports 50+ financial institutions. Users can track net worth, set budgets, and export reports. PCI-DSS compliant frontend.
Real estate MLS portal
Built a property search portal for a real estate brokerage in Los Angeles. Uses Next.js, Mapbox GL, and MLS API integration. Features interactive maps, saved searches, and email alerts. Loads property listings in under 1.2 seconds.
Edtech virtual classroom
Developed a virtual classroom interface for an edtech company serving 10,000+ students. Uses Vue.js, WebRTC for video, and Liveblocks for collaborative whiteboarding. Supports breakout rooms and real-time polls. FERPA compliant.
Why teams hire us.
Fixed price, not hourly
Every frontend project gets a fixed quote after the 2-week Roadmap phase. You know the total cost before we write a line of code. No hourly billing, no surprise overtime charges.
Senior engineers only
Every developer on your project has 8+ years of experience. We do not hire juniors. You get someone who has shipped React apps handling 100K+ monthly active users.
12-week delivery guarantee
We build MVPs in 8-12 weeks. That includes design, development, QA, and deployment. If we miss the timeline, we cover the next sprint at no cost.
Full code ownership
You own every line of code from day one. No proprietary frameworks, no locked-in platform. Code lives in your GitHub repo and you can self-host or use any infrastructure.
Compliance built in from the start
We build frontends that meet HIPAA, PCI-DSS, SOC 2, and FERPA requirements. Authentication, data encryption, and audit logging are not afterthoughts.
Post-launch support included
Every project includes 1 month of post-launch support and bug fixes. We monitor Sentry, fix critical issues within 24 hours, and help your team transition smoothly.
Idea → Roadmap → Product → Release.
Every engagement runs through the same four-stage pipeline. Predictable by design.
Questions clients ask first.
Related services and industries.
Ready to build? Let's talk.
30-minute discovery call. No deck. We'll tell you honestly what it takes, how long, and how much.