Senior React App Development AgencyReact App
We build React apps with senior engineers who ship in 8-12 weeks. No juniors, no time trackers, no surprises.
IRPR is a senior react app development agency. We use React 18, Next.js 14, TypeScript, and Node.js to build custom web applications that handle complex business logic. Our engineers have built apps for healthcare, fintech, and SaaS companies since 2016.
We ship a production React app in 8-12 weeks with fixed pricing between $80K and $250K. Every app complies with HIPAA, PCI-DSS, or SOC 2 depending on your industry. Senior engineers handle architecture, testing, deployment, and monitoring.
CTOs hire us when their internal team is at capacity and they need experienced React builders. Technical founders use us to launch their MVP in 8 weeks and raise their next round. Product owners at mid-market companies commission us to rebuild legacy Angular or jQuery apps into modern React with full test coverage.
Types of software we ship.
Single-page web app
Interactive dashboards, admin panels, and user portals built with React Router and Redux Toolkit. Fast load times.
Ecommerce storefront
React-powered shopping sites integrated with Stripe, Shopify Storefront API, and custom product catalogs.
SaaS dashboard
Multi-tenant SaaS platforms with React, Chart.js, and real-time updates via WebSockets or Supabase.
Healthcare patient portal
HIPAA-compliant React apps with FHIR integration, secure messaging, and appointment scheduling.
Fintech trading interface
Real-time trading UIs built with React, WebSocket feeds, and Plaid integration for account linking.
Real estate listing platform
MLS-connected React apps with map views (Mapbox), property search, and lead capture forms.
Educational learning app
FERPA-compliant React apps with interactive lessons, video streaming (Mux), and progress tracking.
Internal tools and admin panels
Custom CRUD apps with React Table, React Query, and role-based access control for operations teams.
We build for every business type.
Healthcare
Fintech
Ecommerce
SaaS
Real estate
Why hire a senior react app development agency
Generic agencies use junior developers. We use senior React engineers who have shipped 10+ production apps each.
IRPR was founded by ex-FAANG engineers who saw the same pattern: agencies sell senior talent but staff juniors. We flipped the model. Every engineer on your project has 7+ years of React experience and a proven portfolio. We do not outsource or hire apprentices on your dime.
Our senior engineers produce clean, testable code with 90%+ test coverage and CI/CD pipelines that deploy to AWS, Vercel, or Netlify automatically. You get a production app with Sentry error tracking, Datadog monitoring, and automated backups on day one.
We also handle compliance. Healthcare apps pass HIPAA audits. Fintech apps meet PCI-DSS Level 1. SaaS apps align with SOC 2 Type II controls. Our engineers pair program when needed and deliver weekly demos. No black box, no surprises.
The difference between IRPR and a generic dev shop
Most agencies promise senior React developers. We deliver them, and we have the track record to prove it.
When you hire a generic agency, you often get a junior developer who learned React last month. They write slow, hard-to-maintain code. Deadlines slip. You pay hourly for their learning curve. IRPR is different. Our senior React engineers cost more per hour but ship faster with fewer bugs. Total cost to market is lower.
We use modern React patterns: functional components, hooks, React Query for data fetching, Zod for validation, and Playwright for end-to-end tests. Every PR is reviewed by a second senior engineer. We deploy every change to a preview URL. You see real progress every single day.
- Assigns junior React developers to your project
- Uses class components and outdated patterns
- No test coverage - code breaks in production
- Bills hourly with no fixed price guarantee
- No compliance experience - you audit alone
- Hands over code with no documentation or CI/CD
- All senior React engineers with 7+ years of experience
- Uses modern React 18, hooks, and TypeScript
- 90%+ test coverage with Playwright and Vitest
- Fixed price from $80K with no overtime charges
- Built-in HIPAA, PCI-DSS, SOC 2 compliance
- Delivers full repo with CI/CD, docs, and 1-hour SLA
Our process for building your React app
We follow a four-phase process that turns your idea into a deployed production app. No scope creep, no delays.
Phase 1: Idea. We run a 1-week discovery where we map your user flows, data model, and third-party integrations. You get a technical spec and a fixed price quote. No payment needed until you approve.
Phase 2: Roadmap. We create a detailed 12-week project plan with weekly milestones, risk register, and testing strategy. Every sprint has a clear deliverable. You approve the plan, we start building.
What ships with every React app from IRPR
You own everything. Source code, domain, AWS account, and all third-party accounts are yours from day one.
We do not hold your code hostage. Every project ships with a complete GitHub repository, a CI/CD pipeline on GitHub Actions that deploys to your own AWS or Vercel account, and a 50-page technical documentation site. You can walk away at any time and keep everything.
Monitoring and alerting are pre-configured. We set up Sentry for error tracking, Datadog for performance, and PagerDuty for alerts. You get real-time insight into your app's health. Our team provides 1-hour critical incident response for the first 90 days after launch.
- Source code in your private GitHub repo (full ownership)
- CI/CD pipeline on GitHub Actions with automated tests
- React 18 + Next.js 14 + TypeScript codebase
- 90%+ test coverage with Vitest and Playwright
- Sentry error tracking with team alerts
- Datadog performance monitoring dashboard
- Deployment to your AWS or Vercel account
- 50-page technical documentation (Notion site)
- 1-hour SLA for critical incidents (90 days post-launch)
- Post-launch support with a senior engineer retainer option
What we ship in this practice.
Patient engagement portal for a telehealth startup
Built a React app with WebRTC video calls (Twilio), secure messaging, and appointment scheduling. Integrated with Epic FHIR API. Reduced no-show rate by 30%. Stack: React 18, Node.js, PostgreSQL, Twilio, AWS.
Real-time stock trading dashboard for a fintech company
Developed a React app with WebSocket streams for live prices, interactive charts (TradingView), and Plaid account linking. Handled 10,000 concurrent users on launch. Stack: Next.js, Redis, WebSockets, AWS.
Custom ecommerce platform for a DTC brand
Created a headless React storefront with Shopify Storefront API, custom checkout, and upsell logic. Increased average order value by 22%. Stack: React, Next.js, Stripe, Shopify, Vercel.
Multi-tenant SaaS analytics dashboard for a B2B company
Built a React app with role-based access, embedded charts (Chart.js), and CSV export. Onboarded 150 enterprise clients in first quarter. Stack: React, Node.js, PostgreSQL, AWS, Sentry.
Property listing portal with MLS integration for a real estate firm
Developed a React app with Mapbox maps, advanced search filters, and lead capture forms. Connected to 3 MLS feeds. Generated 500 qualified leads per month. Stack: React, Mapbox, MLS API, Firebase.
Interactive learning platform for an edtech nonprofit
Built a FERPA-compliant React app with video streaming (Mux), quiz engine, and progress tracking. Used by 12,000 students in first semester. Stack: React, Next.js, Supabase, Mux, AWS.
Why teams hire us.
Fixed price, not hourly billing
Every project gets a fixed quote in the Roadmap phase (week 2). No hourly billing, no surprise invoices, no time tracking. You know the exact cost before we write a line of code.
Senior engineers only, no juniors
Every engineer on your project has 7+ years of React experience. We do not have junior roles. Our engineers have worked at Google, Meta, and Stripe. They ship production code on day one.
Compliance built in, not bolted on
We have built apps that passed HIPAA audits, PCI-DSS Level 1 assessments, and SOC 2 Type II reviews. We include compliance documentation, audit logs, and data encryption as standard features.
8-12 week delivery, not 6 months
Our parallel engineering model uses two senior engineers working in tandem. We ship a production-ready MVP in 8-12 weeks. Most agencies take 6-9 months for the same scope.
Full code ownership from day one
You own the GitHub repository, domain name, and AWS/Vercel account from day one. We do not hold your code hostage. You can terminate the engagement and retain every asset. No lock-in.
Post-launch support with 1-hour SLA
After launch, we provide 90 days of support with a 1-hour response time for critical incidents. A senior engineer monitors your app's health via Sentry and Datadog. Retainers available for ongoing development.
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.