Java modernization · Paris
Java modernization services in Paris
GDPR-first, fully documented and hosted in the EU, with a senior team working your morning hours.
Clarigo Infotech upgrades and modernizes Java applications: Java 8 or 11 to Java 17 or 21, older Spring and Spring Boot versions to current releases, javax to jakarta namespaces, and heavy application servers to lightweight containers. Where it helps, we split monoliths into services. Every step is covered by automated tests, so the application keeps working while it is upgraded.
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 our Java modernization covers
Java version upgrades
Java 8 or 11 to Java 17 or 21 LTS, including library and build-tool updates.
Spring Boot upgrades
Spring Framework and Spring Boot 1.x and 2.x to current versions, including the javax to jakarta move.
App server to containers
WebLogic, WebSphere, JBoss or Tomcat deployments moved to Docker, Kubernetes or managed cloud services.
Monolith to microservices
Carefully split large Java applications into services, only where it improves delivery or scale.
Build and CI/CD
Maven and Gradle cleanup, automated tests and pipelines that make every release safe.
Performance and security
Dependency and vulnerability fixes, JVM tuning and profiling for faster, safer applications.
How we approach Java modernization
Why move to Java 17 or 21
Newer long-term-support versions bring better performance, security updates and language features, and current Spring Boot versions require them. Staying on Java 8 means growing security and hiring risk.
Upgrade path, not a rewrite
We upgrade in stages (build tools, dependencies, language version, framework), testing at each stage, so you always have a working, releasable application.
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.
Where we help Paris businesses most
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. From internal tools to customer platforms, built and supported by one team.
Aerospace
Aircraft makers and suppliers need engineering and data software. We build the platforms, integrations and internal tools this sector relies on.
Tourism and hospitality
Hotels and attractions compete for online bookings. Custom software that fits how these teams already work.
AI startups
A growing AI scene creates demand for product engineering. From internal tools to customer platforms, built and supported by one team.
How the hours line up
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
Local platforms and setup
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.
Java 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.
Where will our data be hosted?+
Usually in AWS Europe (Paris), Google Cloud europe-west9 (Paris) and Azure France Central, or wherever your data rules require. Everything runs in your own cloud account, so you stay in control.
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 work with luxury and fashion companies?+
Yes. Luxury and fashion is one of Paris's key sectors, and we build the platforms, integrations and internal tools this sector relies on.
Do you upgrade Spring Boot 2 to Spring Boot 3?+
Yes, including the javax to jakarta namespace change, configuration updates and library replacements it requires.
Who owns the code and data?+
You do. All source code, configuration and data stay yours, in your own repositories and cloud accounts.
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