Best Web Application Modernization Firm for Legacy AppsWeb Application
We modernize old Angular, jQuery, and .NET apps into React, Node, and AWS stacks. 8-12 week timeline. Fixed price from $80K.
IRPR is the best web application modernization firm for companies running on old code. We replace legacy frameworks like AngularJS, jQuery, and .NET with modern stacks: React, Next.js, Node.js, and AWS Lambda. Every project ships as a fully functional app, not a half-finished prototype.
Our typical modernization project takes 8 to 12 weeks and costs $80K to $250K. We use fixed pricing from the Roadmap phase (week 2) so you know the budget before any code is written. Every delivery includes source code ownership, CI/CD pipelines, and compliance with HIPAA, PCI-DSS, or SOC 2 if needed.
We work with CTOs who need to reduce technical debt, product owners who want faster feature releases, and engineering directors who need their team to stop fighting old frameworks. Each buyer gets a clear plan and a working app within 12 weeks.
Types of software we ship.
Legacy .NET App Modernization
Convert old .NET Web Forms or MVC apps to .NET Core with React frontends and Azure deployment.
AngularJS to React Migration
Rewrite Angular 1.x apps into React with Redux state management and TypeScript for maintainability.
jQuery Monolith Refactoring
Break large jQuery codebases into modular React components with automated testing via Jest.
PHP to Node.js Migration
Move legacy PHP apps (Laravel, WordPress) to Node.js with Express or Fastify for better performance.
Cloud Migration from On-Prem
Migrate on-premise servers to AWS EC2, Lambda, or ECS with zero downtime and automated backups.
Database Modernization (SQL to NoSQL)
Convert old SQL Server schemas to PostgreSQL or MongoDB with schema migration scripts and data validation.
API Gateway Rearchitecture
Replace old SOAP APIs with RESTful or GraphQL endpoints using Apollo Server and AWS API Gateway.
CI/CD Pipeline Setup
Build GitHub Actions or Jenkins pipelines for automated builds, tests, and deployments to staging and production.
We build for every business type.
Healthcare
Fintech
Ecommerce
SaaS
Enterprise
Why IRPR is the best web application modernization firm for legacy code
We ship modern apps fast. Here is the proof from 200+ projects.
Every modernization project we start has a fixed scope. We do not rewrite code blindly. We analyze the old app, map dependencies, and write a migration plan in week 1.
Our team of senior engineers (average 10+ years) handles each migration. They use tools like SonarQube for code quality checks and Docker for containerization from day one.
The difference between a generic dev shop and the best web application modernization firm
Most agencies charge hourly and rewrite everything. We do not.
Generic shops often start with a discovery phase that lasts months. They bill hourly and add scope creep. Their code is not tested.
IRPR writes a fixed-price contract in week 2. We use automated testing from day one. Every migration ships with a CI/CD pipeline and a clear rollback plan.
- Hourly billing with no cap
- No fixed timeline
- Rewrites from scratch without analysis
- No code quality checks
- No CI/CD pipeline delivered
- No post-migration support
- Fixed price from $80K
- 8-12 week timeline
- Code analysis before rewrite
- SonarQube + Jest testing
- GitHub Actions CI/CD
- Sentry error monitoring included
How we modernize your web application in 4 phases
Every project follows the same roadmap. No surprises.
Phase 1 is analysis. We run your old app through a dependency mapper tool and list every file, API, and database call.
Phase 2 is planning. We write a migration path with specific file-by-file changes. You approve it before any code is written.
What ships with every modernization project from IRPR
Every delivery includes these 8 items. No extras to buy.
We do not hand over a zip file. We deliver a working system with full documentation and training.
- Source code in your GitHub repo
- CI/CD pipeline on GitHub Actions
- Sentry error tracking configured
- Automated Jest test suite (80%+ coverage)
- Deployment to AWS or your server
- Database migration scripts (no data loss)
- API documentation (Postman or Swagger)
- 1-hour team training session
What we ship in this practice.
Healthcare app modernization from .NET to React
A medical billing company moved from .NET Web Forms to React + Node.js. They reduced manual data entry by 8 hours per week and cut page load times from 4 seconds to 0.3 seconds.
Fintech API gateway rewrite from SOAP to GraphQL
A payment processor replaced 12 SOAP endpoints with a single GraphQL API. Integration time for new partners dropped from 3 weeks to 4 days.
Ecommerce platform migration from PHP to Node.js
A large online store moved from PHP (Laravel) to Node.js with Express. Server costs dropped 40% and checkout speed improved 60%.
SaaS CRM migration from AngularJS to React
A CRM provider with 5000 users moved from Angular 1.x to React. They shipped 3 new features in the first month after migration, compared to 1 per quarter before.
Real estate portal rearchitecture with AWS Lambda
A real estate MLS platform moved from a monolith to serverless functions on AWS Lambda. Uptime went from 99% to 99.9% and monthly hosting costs dropped by $3000.
Logistics app database migration from SQL Server to PostgreSQL
A logistics company with 50 warehouses moved from SQL Server to PostgreSQL. Query times dropped 70% and they saved $12,000 per year in licensing fees.
Why teams hire us.
We do not rewrite blind
Every project starts with a code audit using SonarQube and a dependency mapper. We know every file before we write a line of new code.
Fixed price from week 2
We write a fixed-price contract in the Roadmap phase (week 2). No hourly billing, no surprise invoices, no scope creep charges.
We ship in 8-12 weeks
Our average project takes 8 to 12 weeks. We have shipped 200+ modernized apps. We do not take 6 months.
Senior engineers only
Every engineer on our team has 10+ years of experience. We do not use juniors or interns. Your code is written by people who have done this before.
You own the code
You get full source code in your GitHub repo. We do not keep any proprietary code. You can take the app anywhere after we finish.
Compliance built in
We handle HIPAA, PCI-DSS, and SOC 2 compliance as part of the migration. No extra fees for compliance. We build it into the pipeline.
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.
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