JAVA DEVELOPER

Java Developer Portfolio Guide

Enterprise-proven, everywhere deployed. Java powers the world's backend systems.

Demand: HighJunior: $70k - $100k | Mid: $100k - $150k
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Proven at Enterprise Scale

Java powers billions of devices and mission-critical systems worldwide. While not as trendy, Java's reliability and vast ecosystem make it invaluable for serious backend development.

Related Technologies

Spring BootHibernatePostgreSQLKafkaDockerKubernetesMavenJUnit

Profile Tips for Java Developers

1

Master Spring Boot

Spring Boot is the modern Java standard. Show you can build production-ready applications quickly.

2

Show Modern Java

Use Java 17+ features: records, sealed classes, pattern matching. Show you're not stuck in Java 8.

3

Include Microservices

Java excels at microservices. Show you can design and implement distributed systems.

4

Testing Discipline

Java's testing culture is strong. Comprehensive test coverage demonstrates professional maturity.

Project Ideas to Showcase

Spring Boot REST API

Build a complete REST API with Spring Boot, JPA, and proper testing.

JavaSpring BootPostgreSQLJUnit

Microservices System

Create multiple services that communicate via REST or messaging.

JavaSpring CloudKafkaDocker

Event-Driven Application

Build an application using event sourcing or CQRS patterns.

JavaSpringKafkaPostgreSQL

Recommended Tech Stack

Frameworks

  • Spring Boot
  • Quarkus
  • Micronaut

Database

  • Hibernate
  • JPA
  • jOOQ
  • MyBatis

Build Tools

  • Maven
  • Gradle

Testing

  • JUnit
  • Mockito
  • TestContainers
FAQ

Frequently Asked Questions

Less common at early-stage startups than JavaScript or Python, but strong at later-stage companies and enterprise. Particularly valuable for fintech, e-commerce, and B2B startups.

Kotlin is more modern and concise. Java has more jobs and legacy codebases. Many teams use both. Learning Java gives you foundation; Kotlin is an easy addition later.

For most Java jobs, yes. Spring Boot is the dominant framework. Quarkus and Micronaut are alternatives, but Spring Boot has the most opportunities.

Modern Java (17+) is much less verbose than old Java. Records, var, and new features have modernized the language significantly. It's not your grandfather's Java anymore.

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