Java modernization · Stockholm
Java modernization services in Stockholm
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.
Swedish companies most often hire us for SaaS, mobile apps and AI products.
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.
Built for Stockholm teams
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 Swedish Data Protection Act
We design to the GDPR and Sweden's supplementary Data Protection Act: data minimisation, consent, access controls, encryption, EU hosting and a data processing agreement signed before work starts.
Billing
Invoices in Swedish kronor (SEK), euros 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 Stockholm
Stockholm product companies work with us on SaaS, fintech and mobile apps with clean design, weekly demos and GDPR-aware engineering.
Music, gaming and digital media
Stockholm studios ship global consumer apps. We build the platforms, integrations and internal tools this sector relies on.
Fintech
Near-cashless society expects frictionless digital payments. Custom software that fits how these teams already work.
Automotive and industrial
Manufacturers invest in connected products and electrification. From internal tools to customer platforms, built and supported by one team.
Cleantech
Green steel and battery projects need data platforms. We build the platforms, integrations and internal tools this sector relies on.
Your working day with us
Our team's hours, in Stockholm 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
Stockholm time, plus written updates every evening
Local platforms and setup
Local payments
Languages
Data hosting
AWS Europe (Stockholm) and Azure Sweden 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 Stockholm
Do you work with companies in Stockholm?+
Yes. Clarigo Infotech works with companies across Stockholm, including Stockholm, Uppsala, Solna, as part of clients in 20+ countries. Swedish companies most often hire us for SaaS, mobile apps and AI products. We work remotely from India with one in-house team.
What time-zone overlap do we get from Stockholm?+
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 Swedish Data Protection Act?+
We design to the GDPR and Sweden's supplementary Data Protection Act: data minimisation, consent, access controls, encryption, EU hosting and a data processing agreement signed before work starts.
Which currency do you bill in, and what does it cost?+
We bill in Swedish kronor (SEK), euros 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 (Stockholm) and Azure Sweden Central, or wherever your data rules require. Everything runs in your own cloud account, so you stay in control.
Can you integrate Swish or Klarna?+
Yes. We regularly integrate local payment methods such as Swish, Klarna, BankID-backed bank payments, Visa and Mastercard, alongside card payments and subscriptions.
Do you work with music, gaming and digital media companies?+
Yes. Music, gaming and digital media is one of Stockholm's key sectors, and we build the platforms, integrations and internal tools this sector relies on.
Can you upgrade Java 8 applications to Java 17 or 21?+
Yes. We update dependencies, build tools and code in stages, with automated tests at each step, so the application stays releasable throughout.
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.
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