Modernization & migration · Paris
Application modernization services in Paris
GDPR-first, fully documented and hosted in the EU, with a senior team working your morning hours.
Clarigo Infotech modernizes and migrates legacy applications so they are secure, fast and easy to change again: PHP upgrades and migrations to modern stacks, Java 8 to Java 17 or 21 with current Spring Boot, .NET Framework to modern .NET, and monoliths split into services where it genuinely helps. We migrate step by step behind a safety net of automated tests, so your business keeps running while the software underneath gets better.
French companies most often hire us for SaaS products, e-commerce platforms and GDPR-compliant AI.
10+
Years of delivery
600+
Projects delivered
20+
Countries served
25-30
Days to a live MVP
Get a free consultation
Tell us what you need. A senior engineer replies within one working day.
Privacy, quality and clear documentation
European teams tell us they want a partner who treats data protection and quality as the starting point, not an add-on. That is how we work.
GDPR by design
Data minimisation, consent, EU hosting and a signed data processing agreement before any personal data is touched.
Documentation you can audit
Written specifications, architecture notes, test reports and handover documents, so your team or auditors can follow every decision.
Accessible by default
Interfaces built to WCAG guidelines, helping you meet the European Accessibility Act for digital products and services.
Predictable contracts
Fixed scope and price, clear milestones and acceptance criteria, and full ownership of the code and IP.
What we modernize and migrate
PHP upgrades and migration
Old PHP 5 and 7 apps upgraded to PHP 8, or moved to Laravel, Symfony, Node.js or another modern stack.
Java modernization
Java 8 to Java 17 or 21, Spring to current Spring Boot, javax to jakarta, and old app servers to containers.
.NET modernization
.NET Framework and Web Forms to modern .NET, ASP.NET Core and cross-platform hosting.
Monolith to microservices
Split a large codebase into well-defined services, one piece at a time, only where it improves speed or scale.
Front-end modernization
jQuery, AngularJS and server-rendered pages rebuilt in React or Next.js with a modern, accessible UI.
Cloud-native refactoring
Containers, managed databases, queues and serverless, so the app scales and costs less to run.
How we approach Modernization & migration
Why modernize now
Unsupported language versions stop getting security fixes, hosting gets harder, and every new feature takes longer than it should. Modernizing removes that risk and makes the software cheaper to change, without throwing away the business logic that already works.
Rewrite or refactor?
A full rewrite is rarely the safest path. We assess the code and usually recommend an incremental approach: upgrade what can be upgraded, replace the parts that block you, and keep everything that still works. You get a clear recommendation and cost for each option.
No big-bang switchover
We put automated tests and monitoring around the existing system first, then migrate in small, reversible steps, often running old and new side by side. Your users keep working, and every step can be rolled back.
Documented and handed over
You get updated documentation, a CI/CD pipeline and a codebase your own team can maintain. The same engineers can stay on for support and new features.
Remote, but close to Paris
Time-zone overlap
Central European and Indian working days overlap by three and a half to four and a half hours, so your team is online for stand-ups and calls every morning your time.
The GDPR and the French Data Protection Act (Loi Informatique et Libertés)
We design to the GDPR and CNIL guidance: data minimisation, consent, access controls, encryption, data hosted in France or the EU, and a data processing agreement signed before work starts.
Billing
Invoices in euros (EUR) or US dollars. Typical senior rates are $25 to $49 (USD) per hour, or a fixed price for a defined scope.
Industries we work with in Paris
Paris startups and businesses use us for SaaS, e-commerce and AI products, built to the GDPR with interfaces in French and English.
Luxury and fashion
Maisons invest in premium e-commerce and clienteling. We design and ship iOS and Android apps for teams in this sector.
Aerospace
Aircraft makers and suppliers need engineering and data software. Customer and field apps are where we usually start here.
Tourism and hospitality
Hotels and attractions compete for online bookings. Apps for customers, staff and partners, built on one codebase.
AI startups
A growing AI scene creates demand for product engineering. We design and ship iOS and Android apps for teams in this sector.
Your working day with us
Our team's hours, in Paris time
05:30–15:00
Monday to Friday
Overlap with your working day
09:00–15:00
About 6 hours every day
Daily stand-up
09:30
Paris time, plus written updates every evening
Built for how Paris works
Messaging channels
Local payments
Languages
Data hosting
AWS Europe (Paris), Google Cloud europe-west9 (Paris) and Azure France Central, in your own cloud account, so data stays where your rules require.
How it works
1. Free assessment
We review your code, dependencies, infrastructure and data, then give you a written migration plan, risks and a fixed quote.
2. Plan and safety net
We add automated tests and monitoring around what exists today, so every change can be checked against the old behaviour.
3. Migrate in small steps
Module by module, with both versions running side by side where needed. You see progress in a demo every week.
4. Cut over and support
A planned switch-over with a rollback path, then the same engineers stay on to fix, tune and keep it current.
See what we've built
Try it yourself, free
Free browser tools from our team. No sign-up needed.
Application modernization services: questions from Paris
Do you work with companies in Paris?+
Yes. Clarigo Infotech works with companies across Paris, including Paris, La Defense, Boulogne-Billancourt, as part of clients in 20+ countries. French companies most often hire us for SaaS products, e-commerce platforms and GDPR-compliant AI. We work remotely from India with one in-house team.
What time-zone overlap do we get from Paris?+
Central European and Indian working days overlap by three and a half to four and a half hours, so your team is online for stand-ups and calls every morning your time.
How do you handle the GDPR and the French Data Protection Act (Loi Informatique et Libertés)?+
We design to the GDPR and CNIL guidance: data minimisation, consent, access controls, encryption, data hosted in France or the EU, and a data processing agreement signed before work starts.
Which currency do you bill in, and what does it cost?+
We bill in euros (EUR) or US dollars. Senior engineers typically cost $25 to $49 (USD) per hour, and fixed-scope projects such as an MVP in 25 to 30 days are quoted after a free consultation.
Can you integrate Cartes Bancaires or PayPal?+
Yes. We regularly integrate local payment methods such as Cartes Bancaires, PayPal, Lydia / Wero, Alma, Apple Pay, alongside card payments and subscriptions.
Do you support WhatsApp?+
Yes. Customers in Paris often prefer WhatsApp and LinkedIn and Email, so we connect chatbots, notifications and support flows to them.
Do you work with luxury and fashion companies?+
Yes. Luxury and fashion is one of Paris's key sectors, and we design and ship iOS and Android apps for teams in this sector.
Do we have to rewrite everything?+
Usually not. Most projects are a mix of upgrading, refactoring and replacing only the parts that block you. We recommend the lowest-risk path for your situation.
Who owns the code and data?+
You do. All source code, configuration and data stay yours, in your own repositories and cloud accounts.
Application modernization services around the world
Worldwide page →North America
UK & Europe
UKGermanyNetherlandsSwitzerlandIrelandSwedenFranceItalySpainPortugalBelgiumLuxembourgDenmarkNorwayFinlandAustriaPoland
Middle East