Company specialized in Java:
expert outsourcing,
maintenance and modernization

NextAge takes over Java systems already in production. We handle maintenance, version migration and modernization of legacy applications, with our own team and an SLA defined in the contract.

+19 years of experience

+600 companies served

+150 professionals

+13 countries

What does a Java
development company deliver?

See the types of projects NextAge delivers with a dedicated squad, fixed scope and guaranteed SLA. Understand when Java is the most solid technical choice for your roadmap.

Back-end development

Java is one of the leading languages for scalable, high-performance back-end development. NextAge designs robust architectures for web and mobile applications, with efficient integrations and a structure ready to grow with the business.

Technologies: Spring Boot, Spring MVC, Hibernate, JPA, PostgreSQL, MongoDB, Redis

API creation and integration

RESTful APIs built in Java for system integration, communication with third-party services and secure data exposure. NextAge ensures proper versioning, robust authentication and consistent performance on every endpoint delivered.

Technologies: Spring Boot REST, Swagger/OpenAPI, OAuth2, JWT, GraphQL, API Gateway

Web applications

Java makes it possible to build complete web applications, combining a robust back-end with modern front-ends. NextAge delivers responsive, secure and easy-to-maintain applications, bringing together the Java ecosystem and the leading UI frameworks on the market.

Technologies: Spring Boot, Thymeleaf, JSF, Angular/React/Vue.js integration, Bootstrap

Legacy system modernization

Old monolithic Java systems can be migrated to modern architectures without interrupting operations. NextAge carries out version migrations, incremental refactoring, upgrades of obsolete frameworks and cloud infrastructure adoption with controlled risk and full predictability.

Technologies: Modern Spring Framework, Docker containerization, cloud migration, incremental refactoring

Data processing

Java is widely used in solutions for processing, migrating and analyzing large volumes of data. NextAge builds robust pipelines and integrations with BI tools to turn raw data into input for strategic decisions.

Technologies: Spring Batch, Apache Kafka, Apache Spark, Elasticsearch, BI tool integrations

Enterprise system integration

Java is an established choice for integrating heterogeneous systems in enterprise environments. NextAge connects diverse platforms, orchestrates business processes and synchronizes data across systems with unified, traceable flows.

Technologies: Apache Camel, Spring Integration, ESB (Enterprise Service Bus), message brokers, SOAP/REST web services

… and whatever else it takes for your digital transformation to happen now.

NextAge + Java solutions

Proprietary methodologies and specialized services to maximize results in your Java projects

Staff Augmentation

Allocation of specialist Java teams. Unlike traditional outsourcing, you get senior developers, Java architects, tech leads and QAs focused on automated testing, all managed by us. We guarantee continuous code review and enterprise Java architecture standards.

Choose it to scale Java teams without the risks of traditional staffing

Java.NET / C#JavaScriptTypeScriptPythonRubyPHPGoKotlinSwift

Spring BootDjangoFlaskFastAPIRuby on RailsLaravelReact.jsAngularVue.jsNode.js

NextAge specialist ready to talk about your Java project

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Hundreds of Java projects delivered

We have a solid Java portfolio. Everything you need for software at the highest technical and strategic level.

Mockup of the system built for Grupo Pinho

We evolved the import and export management system with improvements and new features, including integration with the Central Bank APIs and data recovery. Core in Java and Spring Boot, reinforcing business rules and performance. The result was more agile processes and decisions and more reliable data.

Services: Staff Augmentation

Want results like these in your company?

What sets our Java
developers apart?

→ The differentials that made NextAge the number 1 choice of market leaders

Validated professionals

Our team is rigorously trained and validated before joining the project. You work with professionals who have already solved complex problems similar to yours.

Learning curve

Unlike traditional staffing, our teams are actively managed by us. Tech leads monitor developer performance and alignment with your goals, accelerating the learning curve.

Quality and testing culture

AI-powered automated testing, code review and CI/CD are part of our DNA. We deliver tested, production-ready code, reducing bugs and rework.

More agility

We adopt truly agile methodologies. Well-planned sprints, incremental deliveries and transparent communication. You follow progress in real time.

Knowledge as a foundation

Our Java developers also have experience with databases (PostgreSQL, Oracle, MongoDB), cloud (AWS, Azure), DevOps and front-end integration (Angular, React, Vue.js). A complete view of the ecosystem.

Cultural alignment

Our teams understand the context and culture of companies. Clear communication, productive meetings and natural alignment with technical and business stakeholders.

// ABOUT

Why NextAge?

Learn our story →

Founded in 2007, NextAge was born to make software development more disruptive, human, and effective.

Innovation has always been at our core. We revolutionized the technology market with Staff Augmentation, our exclusive methodology that brings up to 40% more productivity to teams.

And we didn't stop there! We went further with NextFlow AI, a new way of developing that combines AI and human expertise in every line of code.

Today, we are the partner that transforms complexity into clarity and accelerates your operation with the best talent.

Learn more →

Want to understand more about how NextAge can help your business? Explore articles from our blog, testimonials from our clients and our other services to carry out your digital transformation in the best way.

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Questions and answers

What are the risks of running Java 8 or Java 11 in production today?

There are four risks, in order of urgency. First, security: versions outside the support cycle no longer receive vulnerability fixes, so every new CVE published becomes permanent in that environment. Second, compliance: security frameworks and corporate contracts require software within the vendor support window, and an expired version becomes an audit finding with a remediation deadline. Third, blocked evolution: anyone on Java 8 cannot run Spring Boot 3, and that closes doors in a chain reaction with libraries, frameworks and cloud services. Fourth, cost: modern versions deliver performance gains and lower memory consumption without rewriting code, so running an old version means paying more for the same processing.

Does Java 8 still receive security fixes?

It depends on the support model you have contracted. Java 8 left Oracle's free public support in January 2019. Since then, security fixes for Java 8 require an active commercial contract with Oracle. Companies running Java 8 without that contract are exposed to vulnerabilities with no fix available. Java 11 ended its free long-term support (LTS) in September 2023. The current LTS versions with active support are Java 21, released in 2023, and Java 25, released in September 2025, with at least 8 years of guaranteed support.

Does an outdated Java version fail a security audit?

Generally, yes. Frameworks such as ISO 27001 and PCI-DSS require production software to be within the vendor support cycle. A Java version without available security updates is a predictable finding in any serious audit. In the financial sector regulated by the Brazilian Central Bank, CMN Resolution 4.893 requires vulnerability management and technology risk control; running unsupported software is direct exposure to that requirement. The finding comes with a remediation deadline, and a remediation deadline has a cost.

My vendor says my system's Java cannot be upgraded. Is that true?

In most cases it cannot be upgraded that way, which is different from not being upgradable at all. The real blockers exist and are well known: dependencies with no compatible version, unsupported frameworks (Struts 1, old JSF, Spring 4), use of internal JVM APIs removed in newer versions, legacy application servers. All of them have a technical path: replacing the dependency, upgrading the framework in stages, or partial modernization with the system live. If you got the answer "it can't be done" without a list of the specific technical blockers, with dependency name and version, ask for that list. It is the test.

How do I find out which Java version my systems are running?

A version inventory can be done in three ways. The simplest is running java -version on the application servers. For environments with multiple services, observability tools such as New Relic, Dynatrace or Datadog identify the runtime version of every running application. For legacy systems without monitoring, the mapping requires server access and analysis of the deployment artifacts. NextAge performs this diagnosis as part of the onboarding process in any maintenance or migration project.

How long does a migration from Java 8 to Java 21 take?

It depends on the size of the system, the number of dependencies and the state of test coverage. Migrations of mid-sized systems (between 200 thousand and 1 million lines of code) usually take 3 to 6 months under an incremental migration model, with the system in production throughout the process. Systems with very outdated frameworks (Struts, Spring 3) or without test coverage may require 6 to 12 months. The real timeline is only defined after a technical inventory; any estimate without one is a guess.

Is it possible to migrate the Java version without stopping the production system?

Yes, as long as the migration is done incrementally. The process involves mapping incompatible dependencies, upgrading in stages with automated tests at every cycle, keeping the current environment stable while the new one is validated in parallel, and cutting over with a planned rollback. Systems without adequate test coverage need a prior instrumentation stage before the migration starts. Stopping the system to migrate is an unnecessary risk in most cases.

How do I choose a specialized Java company to take over my legacy system?

Seven objective criteria. First, how many Java developers the company has and how many are senior: a Java specialist is someone who maintains an installed base, not someone who has done one project. Second, whether it takes over legacy systems it did not write, which is where most software factories decline. Third, how many version migrations it has completed and in what timeframe: ask for the number, not the promise. Fourth, whether the SLA is in the contract with metrics and penalties, because an SLA without numbers is just talk. Fifth, how the takeover and shadowing period work: whoever has no transition method will learn on your system. Sixth, whether there is experience in your regulated sector, because banks, insurers and payment providers have audit requirements that change the way of working. Seventh, what happens if the lead developer leaves: if the answer is not a process, the risk has only moved.

What is the cost of not upgrading Java?

The cost has four components. Infrastructure: modern Java versions consume less memory and process more on the same hardware, so anyone on Java 8 pays more for it month after month. Security: an incident originating from a known, unpatched vulnerability has a response cost, a regulatory cost and a reputation cost. Compliance: an audit finding has a remediation deadline and, depending on the sector, a fine. Evolution: every month on an outdated version increases technical debt and makes the future migration more expensive; the system does not stand still, it falls behind.

How does NextAge develop Java projects?

NextAge assembles technical squads specialized in Java to develop projects with fixed scope, defined deadline and guaranteed SLA. The process starts with AI-assisted requirements mapping, moves through development with documented deliveries sprint by sprint, and includes code quality validation at every stage. The result is a Java project delivered with operational predictability and guaranteed technical quality from the first commit to production deployment.

Company specialized in Java:
expert outsourcing,
maintenance and modernization

What does a Java
development company deliver?