Mid/Senior Java Developer

Bonapolia; Deutschland; Vor Ort; EUR 90.000 - 130.000; Vollzeit

Zusammenfassung

Jobtailor is seeking a skilled backend engineer to design and evolve scalable systems using Java 21 and Spring Boot. You will work in a microservices-based environment, building robust REST APIs and ensuring security and performance.

Responsibilities include optimizing CI/CD with GitLab, containerizing with Docker on AWS, and maintaining code quality with SonarQube, tests with JUnit/Mockito/AssertJ, and monitoring via Grafana. Strong collaboration in an agile team is essential.

Qualifikationen

• Proven professional experience in Java development.
• Proficiency in Java 21 and Spring Boot.
• Experience with Gradle as a build system.
• Hands-on testing with JUnit, Mockito, AssertJ.
• Familiarity with SonarQube for code quality.
• Strong GitLab and CI/CD experience.
• Experience with Docker containerization.
• Hands-on AWS experience.
• Logging with Logback/SLF4J and Grafana monitoring.
• Kafka messaging and event streaming experience.
• PostgreSQL and Redis proficiency.
• Microservices design and security best practices.
• DevOps practices and tooling knowledge.
• Fluent English with collaborative mindset.

Aufgaben

• Design and develop scalable, high-performance backend systems using Java 21 and Spring Boot
• Build and optimize REST APIs following best practices in software architecture
• Work within a microservices architecture, ensuring modularity and maintainability
• Manage builds and dependencies using Gradle
• Write and maintain automated tests using JUnit, Mockito, and AssertJ
• Ensure code quality through SonarQube analysis and code review processes
• Work with GitLab for version control and CI/CD pipeline management
• Containerize and deploy services using Docker on AWS
• Implement logging with Logback/SLF4B and monitor systems via Grafana
• Handle asynchronous event-driven communication using Kafka
• Work with PostgreSQL as the primary database and Redis for caching
• Apply strong security principles and best practices throughout the development lifecycle
• Collaborate closely with cross-functional teams in an agile environment

Kenntnisse

Java 21

Spring Boot

Gradle

JUnit

Mockito

AssertJ

Docker

AWS

PostgreSQL

Redis

Kafka

GitLab

SonarQube

Grafana

Logback

SLF4J

Microservices

Security principles

DevOps practices

Tools

Gradle

Docker

AWS

GitLab

Grafana

Kafka

PostgreSQL

Redis

SonarQube

Logback

SLF4J

Jobbeschreibung

• Design and develop scalable, high-performance backend systems using Java 21 and Spring Boot


• Build and optimize REST APIs following best practices in software architecture


• Work within a microservices architecture, ensuring modularity and maintainability


• Manage builds and dependencies using Gradle


• Write and maintain automated tests using JUnit, Mockito, and AssertJ


• Ensure code quality through SonarQube analysis and code review processes


• Work with GitLab for version control and CI/CD pipeline management


• Containerize and deploy services using Docker on AWS


• Implement logging with Logback/SLF4B and monitor systems via Grafana


• Handle asynchronous event-driven communication using Kafka


• Work with PostgreSQL as the primary database and Redis for caching


• Apply strong security principles and best practices throughout the development lifecycle


• Collaborate closely with cross-functional teams in an agile environment

Requirements

• Proven professional experience in Java development with a strong technical background


• Proficiency in Java 21 and Spring Boot


• Experience with Gradle as a build and dependency management tool


• Hands-on experience with JUnit, Mockito, and AssertJ for testing


• Familiarity with SonarQube for code quality assurance


• Solid experience with GitLab and CI/CD pipelines


• Experience with Docker containerization


• Hands-on experience with AWS cloud services


• Knowledge of Logback and SLF4B for logging


• Experience with Grafana for system monitoring


• Working knowledge of Kafka for messaging and event streaming


• Proficiency with PostgreSQL and Redis


• Expertise in solution design and microservices architecture


• Strong understanding of security principles and best practices in software development


• Knowledge of DevOps practices and related tooling


• Strong problem-solving and analytical skills with a collaborative mindset


• Lithuanian, Latvian, or Estonian citizenship (residency requirement; BGC required)


• Fluency in English.

Core Competencies

Demonstrates expertise in designing and developing scalable backend systems using Java 21 and Spring Boot, with a strong focus on microservices architecture, REST API optimization, and security best practices. Proficient in utilizing tools such as Gradle, Docker, and AWS for efficient development and deployment processes.

Highest-signal resume keywords

• Java 21 Development


• Spring Boot Framework


• Microservices Architecture


• REST API Development


• AWS Cloud Services

ATS Optimization Keywords

Hard Skills

• Java 21


• Spring Boot


• Gradle


• JUnit


• Mockito


• AssertJ


• Docker


• PostgreSQL


• Redis


• Kafka

Soft Skills

• Problem-Solving


• Analytical Skills


• Collaborative Mindset

Industry Keywords

• Agile Environment


• Security Principles


• DevOps Practices

Tools & Technologies

• SonarQube


• GitLab


• CI/CD Pipelines


• Logback


• SLF4B


• Grafana