Senior UI Frontend Development DevelopersSenior UI
Hire senior UI frontend development developers who build pixel-perfect, high-performance interfaces. Get a dedicated team shipping production-ready React, Vue, or Angular apps in 8-12 weeks.
IRPR builds complete frontend systems using React, Vue, Angular, Next.js, TypeScript, and Tailwind. We create component libraries, design systems, and high-traffic UIs that pass strict accessibility and performance audits.
Every project ships in 8-12 weeks with a fixed price between $80K and $250K. You get senior engineers only - no juniors, no time tracking, and a dedicated project manager. All code is compliant with WCAG 2.1 AA and includes automated testing via Jest and Cypress.
SaaS founders hire us to build investor-ready dashboards. Enterprise teams bring us in to replace legacy jQuery UIs with modern React or Vue stacks. Startups trust us for their MVP frontend, and agencies use us as overflow capacity for their biggest clients.
Types of software we ship.
Custom UI Component Library
Build reusable React or Vue components with Storybook documentation. Ships with Figma tokens and Chromatic visual regression tests.
Responsive Web Application
Full-screen web app with mobile-first design, lazy loading, and SSR using Next.js or Nuxt. Integrates with REST or GraphQL APIs.
Single-Page Application (SPA)
Fast, dynamic SPA with client-side routing, state management (Redux, Pinia), and real-time data via WebSockets or Firebase.
Progressive Web App (PWA)
Installable PWA with offline support, push notifications, and background sync. Uses Workbox and Lighthouse-scored at 90+.
Admin Dashboard
Data-heavy dashboard with charts (Chart.js, D3), tables (AG Grid), and role-based UI. Built for speed on large datasets.
Landing Page / Marketing Site
High-converting static site with CMS integration (Contentful, Sanity), optimized for Core Web Vitals and 95+ PageSpeed score.
E-commerce Frontend
Product catalog, cart, checkout with Stripe or Shopify integration. SSR for SEO, lazy images, and A/B testing ready.
Design-to-Code Conversion
Figma or Sketch designs turned into pixel-perfect React/Vue code. Includes responsive breakpoints and hover/transition states.
We build for every business type.
SaaS companies
E-commerce
Enterprise
Agencies
Startups
Why senior UI frontend development developers matter
Senior engineers ship faster, write cleaner code, and prevent tech debt before it starts.
IRPR hires only senior frontend developers with an average of 10 years of production experience. They have built UIs for healthcare platforms, fintech dashboards, and e-commerce sites serving millions of users.
Every developer knows at least three frameworks, writes TypeScript by default, and follows the same code standards across projects. We maintain a shared eslint config, prettier rules, and a design token system that cuts handoff time by 30%.
Generic dev shop vs. IRPR senior frontend team
The difference is in the onboarding speed, code quality, and delivery guarantee.
Most agencies assign junior developers after you sign. They bill by the hour and the timeline slips as they learn on your project. IRPR does the opposite.
We assign a senior team from day one. You get a fixed quote after a two-week Roadmap phase, and we guarantee delivery in 8-12 weeks. No hidden fees, no junior developers.
- Junior developers learn on your project
- Hourly billing with no fixed budget
- Timeline slips by 4-6 weeks on average
- No design system - every page looks different
- QA is manual and slow
- Code is proprietary - no tests or docs
- Only senior engineers with 8+ years experience
- Fixed price after Roadmap phase - no surprises
- 8-12 week delivery with weekly demos
- Shared design system built in Figma and Storybook
- Automated testing (Jest, Cypress) for every component
- Full source code ownership with CI/CD pipeline
How we build your frontend in 8-12 weeks
Four phases, each with clear deliverables and client approval gates.
We start with a two-week Roadmap where we audit your design files, choose the tech stack, and produce a fixed-price proposal. After you approve, we move into three two-week sprints for development.
Every sprint includes building components, writing tests, and deploying to a staging environment. You see live progress and can give feedback daily via Slack or weekly calls.
What ships with every project
Every deliverable is production-ready and owned by you.
We hand over everything your team needs to maintain and extend the frontend. Nothing is held back, no black boxes.
- Source code in your private GitHub or GitLab repo
- Figma design system with all component variants
- Storybook instance with live component documentation
- CI/CD pipeline using GitHub Actions or GitLab CI
- Automated unit tests (Jest) and integration tests (Cypress)
- ESLint + Prettier configuration with shared rules
- Responsive design across mobile, tablet, and desktop
- Accessibility audit report targeting WCAG 2.1 AA
- Lighthouse performance score goal of 90+
- Deployment scripts for Vercel, Netlify, or AWS S3+CloudFront
What we ship in this practice.
Healthcare patient dashboard
Built a real-time patient monitoring dashboard with React, D3 charts, and WebSocket feeds. The new UI reduced data load time from 8s to 1.5s and cut nursing charting time by 30%. Compliant with HIPAA data handling.
Fintech investment portal
Developed a high-frequency trading interface using Next.js, TypeScript, and WebSocket streams. The team delivered 99.9% uptime during market hours and reduced trade execution latency by 40ms.
E-commerce product configurator
Created a 3D product configurator with Three.js and React, integrated with Stripe checkout. Conversion rate improved by 22% after launch, and average session time increased to 4 minutes.
SaaS analytics dashboard
Built a multi-tenant dashboard using Vue 3, Pinia, and AG Grid. Customers can filter millions of rows in under 200ms. The client reported a 15% reduction in churn after the new UI released.
Real estate property search
Implemented a map-based property search using React, Mapbox GL JS, and Algolia for instant results. Page load time dropped from 5s to 1.2s, and mobile bounce rate decreased by 18%.
EdTech interactive learning platform
Delivered an Angular-based interactive lesson platform with RxJS state management and WebRTC for live sessions. Student engagement scores increased by 35% within the first semester.
Why teams hire us.
Senior engineers only - no juniors
Every IRPR frontend developer has 8+ years of production experience. You never get junior developers learning on your time or your budget.
Fixed price contracts, not hourly billing
After the two-week Roadmap phase, we give you a fixed price for the entire project. No hourly tracking, no surprise overtime, no scope creep charges.
8-12 week delivery guarantee
We scope every project to ship in 8 to 12 weeks. If we miss the deadline, you get a discount on the next phase. Our track record is 98% on-time delivery.
Design system and component library included
Every project starts with a design token system and Storybook component library. This speeds up future development and keeps your UI consistent across teams.
Production-ready code with full test suite
All code ships with Jest unit tests, Cypress integration tests, and Chromatic visual regression tests. You get a CI/CD pipeline that runs these on every commit.
Dedicated project manager and daily communication
You work with one project manager who knows your codebase. Teams communicate over Slack, have weekly video calls, and provide daily async updates via Notion or Linear.
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.