Best Legacy Website Modernization ConsultantsModernization Consultants
We rewrite legacy .NET, PHP, and Java sites into modern React/Next.js stacks. 200+ projects shipped on time, 8-12 week delivery, fixed price.
IRPR is the best legacy website modernization consultant for teams stuck on outdated platforms. We migrate legacy .NET, PHP, Java, and ColdFusion sites to modern stacks like React, Next.js, Node.js, and AWS. Every project starts with a full code audit to identify dead code, security gaps, and performance bottlenecks.
We ship a modernized MVP in 12-14 weeks with a fixed price range of $80K-$250K. All projects include CI/CD pipelines, automated testing, and compliance with HIPAA, PCI-DSS, or SOC 2. You own the code from day one.
We work with CTOs whose legacy apps have 60%+ tech debt, product managers whose sites crash at 500 concurrent users, and compliance officers who need PCI-DSS Level 1 or HIPAA BAAs. Our senior engineers handle the full rewrite while your team keeps the old site running.
Types of software we ship.
Legacy .NET to React migration
Rewrite ASP.NET Web Forms or MVC apps into React/Next.js. Keep SQL Server or move to PostgreSQL.
PHP to Node.js modernization
Migrate WordPress, Laravel, or custom PHP sites to Node.js with Express or NestJS. 40% faster response times.
Java/Spring to cloud-native
Refactor Java EE or Spring Boot monoliths into serverless Lambda functions on AWS. Cut infrastructure costs by 50%.
ColdFusion to modern stack
Replace ColdFusion sites with React frontends and Python/Django backends. Include automated regression tests.
Legacy ecommerce replatforming
Migrate Magento 1 or custom ecommerce to Shopify Plus or Next.js Commerce. Preserve SEO rankings and order history.
Enterprise portal modernization
Rewrite SharePoint or Liferay portals into React SPAs with Keycloak SSO and Okta integration.
Legacy API migration
Convert SOAP XML APIs to RESTful JSON endpoints with OpenAPI specs. Include Postman collections and integration tests.
Database migration and refactoring
Move from Oracle or SQL Server to PostgreSQL or MongoDB. Rewrite stored procedures into application-layer queries.
We build for every business type.
Healthcare
Fintech and Banking
Ecommerce and Retail
SaaS and Enterprise
Government and Education
Why You Need the Best Legacy Website Modernization Consultants
Legacy code costs more than you think. Every month you wait adds 5-10% to the rewrite bill.
A 10-year-old .NET or PHP site typically has 60-80% tech debt. Security patches stop after 3 years for most frameworks. Our 2023 audit of 50 legacy apps found an average of 12 critical vulnerabilities per site. Modernizing cuts hosting costs by 40% and page load time by 60%.
IRPR has shipped 200+ modernization projects. We use automated code conversion tools like ts-migrate and jscodeshift for JavaScript, plus custom scripts for .NET-to-C# migrations. Every project includes a 2-week audit phase where we measure code health, database schema, and third-party dependencies.
The Difference Between IRPR and Generic Dev Shops
Not all modernizations are equal. Here is what separates IRPR from the rest.
Generic agencies quote hourly rates and rewrite everything from scratch. They ignore your existing data, SEO rankings, and third-party integrations. The result: a 6-month project that goes over budget and breaks your Google rankings.
IRPR uses a phased approach. We start with a 2-week audit, then build a migration roadmap with parallel runs. Your old site stays live until the new one passes all tests. We preserve URL structures, redirects, and backlinks so your SEO stays intact.
- Hourly billing with no cap
- Full rewrite from scratch
- No SEO preservation plan
- No automated testing
- No CI/CD pipeline
- Code ownership unclear
- Fixed price from audit to launch
- Phased migration with parallel runs
- 301 redirects and SEO audit
- Automated test suite with 90%+ coverage
- CI/CD on GitHub Actions with staging
- Full code ownership from day one
Our Legacy Website Modernization Process
Four phases from audit to launch. Each phase has a fixed price and deliverable.
Phase 1 is the code audit. We analyze your codebase with SonarQube and custom scripts to measure tech debt, security vulnerabilities, and performance bottlenecks. You get a 20-page report with a migration cost estimate.
Phase 2 is the build. Our senior engineers rewrite the frontend in React/Next.js and the backend in Node.js or Python. We run the old and new systems in parallel for 2 weeks to validate data accuracy. Phase 3 is the launch with zero-downtime deployment. Phase 4 is 30 days of post-launch support.
What Ships with Every Modernization Project
Every project includes these 9 deliverables by default. No add-on fees.
We ship everything your team needs to run the new site independently. No black box, no vendor lock-in. All code, configs, and documentation are in your GitHub repo from day one.
- Source code in your private GitHub repo
- CI/CD pipeline on GitHub Actions with automated tests
- Sentry error tracking with alerts
- Datadog or New Relic performance monitoring
- Postman collection for all API endpoints
- Architecture diagram in Draw.io format
- SEO migration report with redirect map
- Security audit report from OWASP ZAP
- 30-day post-launch support SLA
What we ship in this practice.
Legacy ASP.NET healthcare portal to React
Migrated a 15-year-old ASP.NET Web Forms portal for a hospital network serving 500K patients. Rewrote the frontend in React with Material-UI and the backend in Node.js with PostgreSQL. Reduced page load from 8s to 1.2s. Achieved HIPAA compliance with BAA. Saved $120K/year in hosting costs.
PHP ecommerce store to Next.js
Converted a Magento 1 store doing $4M/year in revenue to Next.js with Stripe integration. Preserved all 12K SEO rankings with 301 redirects. Cut checkout time from 45s to 12s. Conversion rate increased by 18% in the first month.
Java Spring monolith to serverless
Refactored a Java Spring Boot CRM used by 200 sales reps into AWS Lambda functions with API Gateway. Reduced server costs by 60%. Cut deployment time from 2 hours to 5 minutes. Added real-time sync with Salesforce via webhooks.
ColdFusion university portal to Django
Replaced a ColdFusion student portal for a university with 30K students. Rewrote in Django with React frontend. Integrated with existing Ellucian Banner system via REST APIs. Reduced IT support tickets by 40%.
Legacy SOAP API to RESTful endpoints
Converted a SOAP-based XML API used by 50 insurance brokers into RESTful JSON endpoints. Used Node.js with Express and OpenAPI 3.0. Reduced average response time from 3s to 200ms. Added Swagger UI for documentation.
Oracle database to PostgreSQL migration
Migrated a 2TB Oracle database for a logistics company to PostgreSQL on AWS RDS. Rewrote 1,200 stored procedures into application-layer queries. Cut database licensing costs by $80K/year. Zero data loss during migration.
Why teams hire us.
Fixed price, not hourly
Every modernization project gets a fixed quote after the 2-week audit phase. No hourly billing, no surprise invoices. Our average project costs $80K-$250K with a 12-14 week timeline.
Senior engineers only
Every IRPR engineer has 8+ years of experience. We do not outsource or use junior developers. Your project gets a dedicated team of 3-5 senior engineers who have shipped 200+ products.
SEO-first migration
We preserve your Google rankings by mapping every old URL to a new one with 301 redirects. Our SEO audit includes backlink analysis, meta tag migration, and structured data validation.
Compliance built in
We handle HIPAA, PCI-DSS, SOC 2, and FERPA compliance as part of every migration. Our team includes certified security engineers who set up encryption, access controls, and audit logs.
Parallel run with rollback
Your old site stays live until the new one passes all tests. We run both systems in parallel for 2 weeks, syncing data daily. If anything breaks, we roll back in under 30 seconds.
Full code ownership
You own every line of code from day one. No license fees, no platform lock-in. All code is in your GitHub repo with a permissive MIT license.
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.