Senior Startup Web App Development AgencyWeb App
We build production-ready web apps for funded startups. 12-week MVPs with senior engineers only.
IRPR builds full-stack web apps for startups using senior engineers only. We use Next.js, React, Node.js, PostgreSQL, and AWS to ship production-ready MVPs that handle real traffic and payments from day one.
Every project ships in 12 to 14 weeks with a fixed price between $80,000 and $250,000. We build to compliance standards like SOC 2 and HIPAA so you can sell to enterprise customers immediately.
We work with seed-stage CTOs who need an MVP to raise Series A, founders scaling from 100 to 10,000 users, enterprise innovation teams building internal tools, and Y Combinator alumni launching their second product.
Types of software we ship.
MVP Web App
Single-page application with auth, payments, and a core workflow. Built with Next.js and Stripe in 12 weeks.
SaaS Platform
Multi-tenant subscription app with user roles, billing tiers, and analytics. Uses PostgreSQL and Auth0.
Marketplace Web App
Two-sided marketplace with listings, messaging, and escrow payments. Integrates Stripe Connect and Twilio.
Internal Tool
Admin dashboard and workflow automation for operations teams. Deployed on AWS Fargate with CI/CD.
Customer Portal
White-label portal for clients to manage orders, invoices, and support tickets. Connects to Salesforce API.
Real-Time Collaboration App
Shared workspace with live cursors and WebSocket updates. Uses Socket.io and React DnD.
Data Dashboard
Interactive analytics dashboard with drill-down charts and CSV exports. Powered by Chart.js and PostgreSQL views.
API-First Web App
Headless frontend with REST/GraphQL APIs for mobile and third-party integrations. Built with Node.js and Apollo.
We build for every business type.
B2B SaaS Startups
Fintech Startups
Healthtech Startups
Ecommerce / D2C Startups
Enterprise / Internal Tool Startups
Why startups hire a senior agency for web app development
Startups need speed, reliability, and code that scales. Senior engineers deliver that in 12 weeks.
IRPR has shipped over 200 web apps for startups in 50 countries. Every project uses a fixed-price model so you know the cost from week 2. No hourly billing, no surprises.
Our 98% on-time delivery rate means you hit your launch date. We also maintain 99.9% uptime on production deployments so your customers never experience downtime.
Startup web app development: senior agency vs generic dev shop
The difference is experience, speed, and transparency. Here is how IRPR compares to a typical outsourced dev shop.
Generic dev shops assign junior developers, use vague scoping, and bill by the hour. Startups often end up with delayed launches, bloated codebases, and no ownership of the intellectual property.
IRPR assigns senior engineers with 10+ years experience, creates a detailed Roadmap in week 2, and gives you a fixed price. You own the full source code and all assets from day one.
- Assigns junior or mid-level developers
- Bills hourly with no cap
- Takes 6+ months for an MVP
- No compliance (HIPAA, SOC 2)
- Hides code in private repos without transfer
- Slow communication across time zones
- Senior engineers only (10+ years average)
- Fixed price after Roadmap phase
- 12-week MVP guarantee
- HIPAA, PCI-DSS, SOC 2 built in
- Full code ownership transferred immediately
- Async-first with 4-hour daily overlap (US time zones)
How we build your startup web app in 5 phases
From idea to production in 14 weeks. Each phase has clear deliverables and you see progress every week.
Phase 1: Audit and Roadmap. We review your idea, define the MVP scope, and provide a fixed-price quote. This takes 1 week and costs a flat $2,500.
Phase 2: UI/UX Design. We wireframe the user flow, design high-fidelity screens in Figma, and get your sign-off before writing any code.
What you get when you hire IRPR for senior startup web app development
Every project ships with a complete production-ready delivery package.
You get a fully functional web app that is tested, documented, and ready for users. No half-baked prototypes or incomplete features.
- Source code in your private GitHub repo
- CI/CD pipeline with GitHub Actions
- Docker containers for local development
- Staging environment on AWS
- Production deployment on AWS or Vercel
- Sentry error tracking and performance monitoring
- Auth0 or Clerk authentication setup
- Stripe or Plaid payment integration
- Unit and integration tests (80%+ coverage)
- Comprehensive user and technical documentation
What we ship in this practice.
Telehealth consultation platform for a healthtech startup
Built a HIPAA-compliant video visit app with secure messaging, appointment scheduling, and Twilio Video. Reduced patient no-show rate by 40% and enabled 200+ daily visits. Stack: Next.js, Twilio, AWS, PostgreSQL.
Investment portfolio dashboard for a fintech startup
Developed a real-time analytics dashboard aggregating data from 3 broker APIs. Automated monthly reporting and cut manual report generation by 15 hours per week. Stack: React, Node.js, Plaid, Chart.js.
Subscription box marketplace for a D2C brand
Created a multi-vendor subscription platform with recurring billing via Stripe and dynamic inventory management. Handled $500K in monthly transactions after 3 months. Stack: Next.js, Stripe Connect, PostgreSQL, Redis.
Multi-tenant SaaS for a B2B CRM startup
Built a modular CRM with custom pipelines, email sync (Gmail/Outlook), and role-based access. Onboarded 50 pilot customers in the first month. Stack: React, Node.js, PostgreSQL, Auth0.
Property listing platform for a real estate startup
Developed a MLS-integrated portal with virtual tours, mortgage calculator, and agent chat. Reduced listing time from days to 2 hours via automated sync. Stack: Next.js, GraphQL, AWS Elasticsearch.
Fleet management dashboard for a logistics startup
Created a real-time tracking dashboard with geofencing alerts and route optimization. Improved delivery on-time rate from 75% to 95%. Stack: React, Node.js, Mapbox, MongoDB.
Why teams hire us.
Fixed price from week 2
After the Roadmap phase you receive a fixed price for the entire MVP. No hourly billing, no scope creep charges. 98% of our projects finish within budget.
Senior engineers only
Every developer on your project has 10+ years of experience. No juniors, no offshore trainees. Our team averages 12 years in production software.
12-week MVP delivery
We design, build, and deploy your MVP in 12 to 14 weeks. 200+ startups have gone from idea to launch with us in that window.
Full code ownership
You own every line of code, every design file, and every infrastructure configuration. We transfer the GitHub repo on day 1 of build.
Compliance built in, not bolted on
We handle HIPAA, PCI-DSS, and SOC 2 during development, not after. Avoid costly rework and pass audits faster.
Global async team with US overlap
We work across 3 time zones but maintain a 4-hour daily overlap with US business hours. You get daily updates and weekly demo calls.
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.