Java Development Company

When is Java the right backend choice?

Java earns its place when a backend has to stay correct under concurrent load and stay maintainable for years by a changing team. Static typing, a compiler that rejects whole classes of mistakes before deploy, and the JVM's just-in-time compiler make it a steady choice for payment processing, order and inventory systems, logistics platforms and anything that plugs into existing enterprise software. It is a weaker fit for a throwaway prototype, for scale-to-zero serverless functions where JVM cold starts hurt (unless you compile with GraalVM native image), and for a site whose real work happens in the browser.

Three signs that point to Java:

• You need transactions, strict consistency and audit trails - JDBC, JPA and mature Kafka clients cover them.
• Your company already runs Java, so shared libraries, monitoring and skills carry straight over.
• Several teams will work in one codebase, where explicit types and packages keep boundaries clear.

Java vs Kotlin vs Go - which should you choose?

Kotlin and Java share the JVM. Kotlin compiles to the same bytecode, calls any Java library directly and can sit in the same project, so the choice is about language style, not platform. Kotlin is more concise, null-safe by design and Google's preferred language for Android; Java changes more slowly, has the larger hiring pool and, with records, sealed types and pattern matching, has closed much of the gap. Java libraries written for your backend can be reused from a Kotlin Android app.

Go is a different platform: one static binary that starts in milliseconds and uses little memory, which suits proxies, network services and infrastructure tooling. It has fewer enterprise frameworks, so a large business domain takes more hand-written code. See our Golang development and Kotlin development services.

How do you modernize a legacy Java application?

Most legacy Java we inherit runs on Java 8 or 11, often inside an application server such as WebLogic, WebSphere or JBoss, with a build nobody wants to touch. We modernize it in steps the business keeps running through, not as a big-bang rewrite.

• Audit first: dependencies, removed and internal JDK APIs (jdeps finds them), test coverage and the app-server features the code relies on.
• Upgrade one LTS release at a time and fix what breaks at each step; OpenRewrite recipes automate much of the mechanical change.
• Move javax.* imports to the jakarta.* namespace that current Jakarta EE and Spring versions require.
• Replace the application server with an embedded server in a container image, deployed through CI to Kubernetes or your cloud.
• Split out a service only where a module has a real reason to scale or release on its own.

How does Miracuves build Java microservices?

We first ask whether you need microservices at all. A well-structured modular monolith is cheaper to run and easier to change, and for a product built by one or two teams it is usually the right first step. When parts of the system do need to scale or deploy independently, we split along business boundaries - payments, orders, notifications - and each service owns its own database.

Services call each other over REST or gRPC and publish events to Kafka, with idempotent consumers and dead-letter topics so a failed message is never silently lost. Each ships as its own container with health checks, Micrometer metrics and OpenTelemetry tracing. For the framework layer see Spring Boot development; for architecture across languages see microservices development.

Which Java version should a new project use?

The newest long-term-support release your libraries and hosting support. Java ships a feature release every six months and an LTS release every two years; production systems belong on an LTS and should move to the next one on a plan, not in an emergency. We use free OpenJDK builds such as Eclipse Temurin or Amazon Corretto by default; Oracle's own JDK carries licence terms worth checking before commercial production use.

Recent LTS releases change how Java code reads and runs:

• Records for immutable data carriers, instead of hand-written getters, equals and hashCode.
• Sealed interfaces with pattern matching in switch, so the compiler checks that every case is handled.
• Virtual threads, final since Java 21, for high-concurrency blocking I/O without a reactive rewrite.

Can Miracuves deliver Java development white-label?

Yes. Agencies and software consultancies bring Miracuves in as their Java team when a client project needs backend capacity they do not have in-house. The NDA is signed before any detail is shared, the code and documentation are handed over ready to carry your brand rather than ours, and the intellectual property is assigned to you or your client at handoff.

You receive the full source, the Maven or Gradle build, database migrations, container images and a runbook, so your client's team - or yours - can build and run the backend without us.

Should you hire Java developers or work with a Java development company?

Hire in-house when Java is your core product and a team will be busy on it for years; senior engineers who can design a domain model, tune the JVM and run Kafka in production take time to find. Work with a company when you need a whole team for a defined build - architect, developers, QA and DevOps - or a modernization project with a clear end.

Miracuves does not rent individual developers by the hour. A custom Java build is scoped and priced before work starts, and the retainer from $2,299/month keeps a dedicated Miracuves Java team on your product after launch.