Technology

Java Development
so the system that runs the business keeps running.

Enterprise Java for businesses in Perth, Melbourne, Sydney and Brisbane, built on Spring Boot. APIs other systems depend on, services that talk to each other, and the overnight batch jobs that have to finish before the office opens.

We also take over Java codebases nobody has touched in years, modernise them, and keep them patched. Built for reliability first, with fixed-price quotes and an Australian team.

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
Australian owned and operated

Built here. Your data stays here.

  • No offshore development. Everything is written by our own team in Australia. Nothing is subcontracted overseas.
  • Your data stays onshore. Hosted in Australia, on infrastructure you own, under Australian law.
  • Every state, not just ours. Perth, Melbourne, Sydney, Brisbane, Adelaide and everywhere between.
What Java Is Good For

Software that keeps running 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.

What We Build

Big, busy systems built on Java

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.

Capabilities catalogue

Every Java job we take on, listed

Every capability below has been delivered for a real Australian business, from a Spring Boot API to a multi-year Java 8 → 21 enterprise modernisation. If your scenario is not listed, ask, we build bespoke.

Spring Boot enterprise apps

  • Spring Boot 3 enterprise web applications
  • Spring Boot + Thymeleaf server-rendered apps
  • Spring Boot multi-tenant SaaS platforms
  • Spring Boot admin portals and back-office tools
  • Spring Boot + Spring Security RBAC apps
  • Spring Boot + Spring Batch high-volume processing
  • Spring Boot scheduled tasks and background jobs

Spring Cloud microservices

  • Spring Cloud microservice architecture
  • Spring Cloud Gateway API gateway setup
  • Spring Cloud Config externalised config server
  • Spring Cloud + Eureka service discovery
  • Spring Cloud + Resilience4j circuit breakers
  • Spring Boot + Docker / Kubernetes deployment
  • Spring Boot monolith → microservices extraction

Java + Postgres / Oracle apps

  • Java + PostgreSQL + Spring Data JPA apps
  • Java + Oracle enterprise database apps
  • Java + SQL Server (jTDS / MS JDBC) apps
  • Java + Hibernate ORM data layer
  • Java + Flyway / Liquibase database migrations
  • Java + HikariCP connection pooling
  • Java + QueryDSL / jOOQ type-safe SQL

Java + Kafka / messaging

  • Java + Apache Kafka producer / consumer apps
  • Java + Spring Cloud Stream messaging
  • Java + RabbitMQ message-driven systems
  • Java + ActiveMQ / Artemis JMS messaging
  • Java + AWS SQS / SNS event handling
  • Java + Kafka Streams stream processing
  • Java event-driven architecture design

Java REST / GraphQL APIs

  • Spring Boot REST API + Spring Web
  • Spring Boot + GraphQL Java APIs
  • Spring Boot + OpenAPI / Swagger documentation
  • Spring Boot + OAuth2 / JWT authentication
  • Spring Boot + gRPC service development
  • Spring Boot reactive APIs with WebFlux
  • Spring Boot API rate limiting and throttling

Legacy Java → modern Java migration

  • Legacy Java application support services
  • Java 6 / 7 / 8 → Java 21 LTS migration
  • Spring MVC + XML → Spring Boot migration
  • EJB / J2EE → Spring Boot migration
  • JSP / Struts → React / Angular front-end migration
  • Application server (WebLogic / WebSphere) → Spring Boot + Docker
  • Hibernate 3/4 → JPA / Hibernate 6 upgrades
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 big systems still run on Java

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.

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.

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.

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

Is your Java system showing its age?

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

Projects where Java earns its place

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

01

Enterprise Resource Planning

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

02

Financial Processing Systems

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

03

Supply Chain & Logistics

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

04

Legacy System Modernisation

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

05

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.

06

Batch Processing & Reporting

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

Migration & Modernisation

Bring an old Java system up to date

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

  1. 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.

  2. 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.

  3. 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.

  4. 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.

  5. 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.

  6. 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

Databases and tools that pair with Java

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

What owners ask about Java projects

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.

Tell us what your Java system needs to do

New build, modernisation, or support. Describe what you need and we will come back with a practical plan.

Prefer a quick chat? Call 0425 531 127. We answer the phone in Perth.