Technology

Java Development
for Australian businesses.

Enterprise Java applications, Spring Boot APIs, microservices, and batch processing systems. Built for businesses that need reliability, performance, and long-term maintainability.

We also take over, modernise, and maintain existing Java codebases across Australia.

Book a 20-min scoping call Need Help with a Legacy Java App?

AU-built Australian owned and operated
Spring Boot, Java 21+ Stack we work with daily
New Builds + Legacy Modernisation New builds + modernisation
Fixed Price scopes, no surprises

What Java Is Good For

Enterprise-grade applications that run reliably for years

Java powers some of the largest, most complex business systems in the world. Banks, insurers, logistics companies, and government agencies run mission-critical applications on Java because it handles complexity, concurrency, and scale with battle-tested reliability.

For Australian businesses, Java makes sense when the application is enterprise infrastructure: financial processing, supply chain management, compliance-sensitive systems, or any application where failure is expensive. Spring Boot makes modern Java development productive without sacrificing robustness.

Java is not the right choice for everything. For simple web applications, a marketing site, or a lightweight API, languages like PHP, Python, or Node.js are faster to build and cheaper to maintain. We recommend Java when the project genuinely needs enterprise-grade durability.

Java Spring Boot development environment for enterprise application development

Week 0

Java Project Audit

15-minute scoping call. We map your current setup, the requirements you need to ship, and the constraints (timeline, integrations, hosting). Fixed-price quote inside 48 hours.
Weeks 1–N

Build & Iterate

Application built incrementally with weekly check-ins. Every feature, integration and validation tested before sign-off. Sandbox / staging environment for safe iteration.
Cutover

Go-Live & Handover

Production deployment on a planned window. Team training, monitoring active, 30 days post-launch support. Documentation and source code handed over in full.

What We Build

Java development, by project type

Enterprise applications, APIs, microservices, batch processing, and legacy modernisation. These are the project types where Java earns its place.

Enterprise Java Applications

Large-scale business applications: ERP modules, supply chain systems, financial platforms, and operational tools. Spring Boot powering the backend, PostgreSQL or Oracle for the database, and a React or Angular frontend. Enterprise-grade architecture for enterprise-grade requirements.

Java excels at this scale. Dependency injection, transaction management, connection pooling, batch processing, and scheduled jobs. The Spring ecosystem handles every enterprise concern. The patterns are well-established and battle-tested across thousands of deployments.

Java API Development

REST and GraphQL APIs built with Spring Boot. Authentication via OAuth2 or JWT, rate limiting, input validation, and auto-generated OpenAPI documentation. Java APIs that serve mobile apps, React frontends, and partner integrations.

Spring Boot makes Java API development productive. Embedded Tomcat, auto-configuration, Spring Data for database access, and Spring Security for authentication. A production-ready API without the XML configuration burden of older Java.

Java Legacy Application Rescue

Your business runs on a Java application built ten or fifteen years ago. Java 8, maybe older. Spring MVC with XML configuration. JSP pages. EJB. The original team has moved on. But the system works, and the business depends on it.

We take over Java applications other teams built. Code audit, dependency review, security assessment, then a plan: upgrade in place, refactor module by module, or rebuild on Spring Boot. The approach depends on the code quality and business constraints.

Java Microservices

Spring Boot microservices for businesses that have outgrown their monolith, or are building new systems that need independent scaling and deployment. Each service handles one domain: authentication, billing, notifications, inventory.

Spring Cloud for service discovery, configuration management, circuit breakers, and API gateway. Docker containers deployed on AWS ECS or Kubernetes. Proper health checks, logging, and monitoring across services.

Batch Processing & Scheduled Jobs

Spring Batch for processing large data volumes: nightly imports, report generation, data reconciliation, bulk email sending, and file processing. Java handles these workloads reliably at scale.

Scheduled tasks with proper error handling, retry logic, and monitoring. Not cron jobs running scripts. Production-grade batch processing with transaction management, skip/retry policies, and job history tracking.

Enterprise Java application with Spring Boot, operational dashboards, and complex business logic

Java Spring Boot API with OpenAPI documentation and microservice architecture

Legacy Java application being modernised from older Java versions to Spring Boot

Java microservices architecture with Spring Cloud, Docker, and service mesh

Java batch processing with Spring Batch for nightly data imports and reconciliation

Manufacturing production dashboard — Case Study

Case Study

Production dashboard improving on-time delivery by 20%

We built a live production tracking dashboard with job costing, scheduling and quality management for a metal fabrication business.

Read the full case study

20% Better on-time delivery

15% More accurate costing

Real-time Production visibility

Why Java

Why Java remains the backbone of enterprise software

Enterprise-Grade Performance Stability Talent Pool

Java enterprise application powering critical business infrastructure

Built for complex, long-lived business systems

Java was designed for enterprise applications. Strong typing, mature frameworks, proven tooling, and 30 years of production deployment. The biggest banks, insurers, and logistics companies run on Java because it handles complexity at scale.

For Australian businesses, this matters when the application is critical infrastructure: financial processing, supply chain management, compliance-sensitive systems. Java gives you the safety rails that dynamic languages do not.

The Spring ecosystem covers authentication, authorisation, database access, caching, messaging, batch processing, and scheduling. Every enterprise concern has a mature, well-documented solution.

Java JVM performance monitoring showing throughput and concurrency metrics

Consistent performance under heavy load

Java runs on the JVM, a highly optimised runtime with decades of performance tuning. JIT compilation, garbage collection optimisation, and multi-threading support. Java applications handle concurrent requests efficiently.

For high-throughput systems (APIs handling thousands of requests per second, batch jobs processing millions of records), Java performance is predictable and consistent. The JVM warms up and gets faster over time.

Modern Java (17+) with virtual threads (Project Loom) makes concurrent programming simpler while maintaining performance. Reactive programming with Spring WebFlux for non-blocking I/O when throughput matters.

Java long-term support timeline showing LTS versions and extended maintenance

Backward compatibility and long-term support

Java is famous for backward compatibility. Code written for Java 8 still runs on Java 21. This is rare in software and enormously valuable for businesses. Your investment in a Java application does not evaporate when a new version arrives.

Long-term support (LTS) releases provide years of security patches and bug fixes. Oracle and Eclipse Adoptium provide LTS versions that enterprises can depend on for five to ten years without forced migration.

For businesses running critical systems, this stability is not boring. It is essential. You can upgrade Java versions on your own timeline, not because a framework forced you. That predictability is worth the trade-offs.

Java developer community and enterprise talent pool across Australia

The largest enterprise developer pool in Australia

Java has one of the largest developer pools in the world. In Australia, Java developers are available across all major cities. Enterprise companies, consulting firms, and agencies all employ Java teams.

This matters for long-term maintenance. If your Java team member leaves, finding a replacement is straightforward. If you need to bring development in-house, the hiring pool is deep. If you switch agencies, the next team knows Java.

Java is taught in most Australian computer science degrees. The talent pipeline is consistent. For enterprise applications that will be maintained for a decade, the availability of skilled developers matters as much as the technology itself.

Support & Upgrades

Already running a Java application that needs attention?

Java applications are built to last, but they still need maintenance. Outdated versions, deprecated frameworks, security vulnerabilities, and departed development teams. We pick up where others left off.

Java Version Upgrades

Upgrade from Java 8, 11, or older versions to Java 21+. Fix deprecated APIs, update module system, and leverage modern language features like records, sealed classes, and virtual threads.

Spring Framework Upgrades

Migrate from Spring MVC with XML to Spring Boot with annotations. Upgrade older Spring Boot versions. Replace deprecated patterns and update security configuration.

Java Application Takeover

Previous team moved on? We audit, document, and take over Java codebases. Bug fixes, feature development, dependency management, and ongoing maintenance.

Performance Tuning

JVM tuning, garbage collection optimisation, connection pool sizing, query optimisation, and thread management. Profile, measure, and fix Java performance bottlenecks.

Security Patching

Java dependency vulnerabilities (Log4j, Spring4Shell, and beyond), security advisories, and CVE fixes. Regular dependency scanning and patching to keep your Java application secure.

Ongoing Development Support

Monthly support plans covering feature development, bug fixes, dependency updates, and infrastructure improvements. Continuous improvement of your Java applications.

Who It's For

Common Java development scenarios

If one of these sounds like your project, Java is a strong fit.

Enterprise Resource Planning

Custom ERP modules and extensions. Inventory, procurement, finance, and operations. Enterprise logic that off-the-shelf ERP does not cover.

Financial Processing Systems

Payment processing, reconciliation, invoicing, and compliance. Java transaction management and strong typing suit financial accuracy requirements.

Supply Chain & Logistics

Tracking, routing, warehouse management, and fleet operations. Java backends handling high-volume transactional data across distributed systems.

Legacy System Modernisation

Java 8 to 21, Spring MVC to Spring Boot, JSP to React. Modernising enterprise Java applications without full rebuilds.

API & Integration Layer

Spring Boot APIs connecting Java enterprise systems to modern frontends, mobile apps, and third-party platforms. API gateway patterns for complex integrations.

Batch Processing & Reporting

Spring Batch for nightly imports, report generation, and data reconciliation. Reliable, transactional batch processing for high-volume data operations.

Migration & Modernisation

Common Java migration and upgrade paths

Upgrading Java versions, migrating frameworks, or modernising deployment. These are the paths we handle most often.

Java 8 → Java 21

Upgrade from Java 8 or 11 to the latest LTS. Records, sealed classes, pattern matching, virtual threads, and modern APIs. Fix deprecated method usage and update third-party dependencies.

Spring MVC → Spring Boot

XML-configured Spring MVC applications migrated to Spring Boot with auto-configuration, embedded server, and annotation-based configuration. Simpler deployment, faster startup, modern patterns.

JSP → React/Angular Frontend

Server-rendered JSP pages replaced with a modern decoupled frontend. The Java backend becomes a pure API. The frontend becomes fast, interactive, and independently deployable.

EJB → Spring Boot

Enterprise JavaBeans replaced with Spring Boot services. Simpler dependency injection, easier testing, and modern deployment. The business logic stays. The framework around it gets simpler.

Monolith → Modular or Microservices

Large Java monoliths decomposed into well-bounded modules or microservices. Only when the monolith genuinely causes deployment, scaling, or team coordination problems.

Application Server → Cloud-Native

Java applications on WebSphere, WebLogic, or JBoss migrated to Spring Boot running in Docker on AWS ECS or Kubernetes. Lighter deployment, faster scaling, lower infrastructure cost.

Technical Fit

Common Java stack combinations

Java is the backend layer. These are the frontend, infrastructure, and tooling combinations we pair it with.

Java + React

Spring Boot API with a React frontend. The most common modern combination for Java enterprise applications. Decoupled frontend, strong backend.

Java + AWS

Spring Boot on ECS or Elastic Beanstalk. RDS for PostgreSQL or MySQL. S3 for storage. SQS for messaging. Java has first-class AWS SDK support.

Java + PostgreSQL

Spring Data JPA with PostgreSQL. Hibernate ORM, Flyway migrations, connection pooling with HikariCP. The standard enterprise database stack.

Java + Docker

Containerised Spring Boot applications. Multi-stage builds with slim JDK images. Docker Compose for local development. ECS or Kubernetes for production deployment.

Java + Kafka

Event-driven architecture with Apache Kafka. Spring Kafka for producers and consumers. Suitable for high-throughput messaging between Java microservices.

Java + .NET Interop

Java services communicating with .NET systems via REST APIs or message queues. Common in enterprise environments running both platforms across departments.

Our core logistics platform was on Java 8 with Spring MVC and JSP. HELLO PEOPLE modernised it to Spring Boot 3 with a React frontend over four months. Same business logic, but the application is faster, easier to deploy, and our new developers can actually work with it.

IT Director Logistics company, Western Australia

FAQs

Common questions about Java development

Is Java still relevant for new projects?

Yes. Java remains one of the most widely used languages globally. Modern Java (17+) with Spring Boot is productive, performant, and well-suited to enterprise applications. The ecosystem is mature, the talent pool is deep, and the JVM continues to improve. Java is the right choice for enterprise-grade systems that need to run reliably for years.

Java or .NET: which should we use?

Both are strong enterprise platforms. Java if your team has Java experience, you run Linux infrastructure, or you want platform independence. .NET if your organisation is heavily invested in Microsoft tooling (Azure, SQL Server, Active Directory). In practice, team experience and existing infrastructure drive the decision more than technical differences.

What about Java vs Node.js or Python?

Node.js for real-time web applications, lightweight APIs, and JavaScript-centric teams. Python for AI, data processing, and automation. Java for enterprise applications with complex business logic, high transaction volumes, and long-term maintenance requirements. We use all three and recommend based on the project.

Can you modernise our legacy Java application?

Yes. We modernise Java 8 and older applications regularly. Java version upgrades, Spring MVC to Spring Boot migration, JSP to React frontend, EJB to modern Spring, and application server to Docker/cloud deployment. Most legacy Java applications can be incrementally modernised without a full rebuild.

How do you scope and price a Java project?

We provide a fixed-price quote after scoping. Spring Boot API services sit at the lower end of project size. Enterprise applications with complex business logic, multiple integrations and admin interfaces are larger. Legacy modernisation depends heavily on the codebase size and condition.

Do you take over existing Java codebases?

Yes. We take over Java projects regularly, often enterprise applications built by previous teams or agencies. We audit the code, document the architecture, fix critical issues, and continue development. If the code quality is poor, we discuss whether modernisation or phased rebuild makes more sense.

What about Kotlin instead of Java?

Kotlin is excellent and runs on the JVM alongside Java. We use it when the team prefers it or the project starts fresh. For existing Java codebases, we typically continue in Java unless there is a specific reason to introduce Kotlin. Both are well-supported by Spring Boot.

Can you migrate us off Java to something else?

We can, but we would want to understand why first. Java is a solid long-term choice. Migrating away should be driven by real problems, not trend-chasing. If there are genuine reasons (team cannot hire Java developers, moving to a platform that favours another language), we plan and execute phased migrations.