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Consulteer

Senior Java Backend Engineer

Consulteer City of Belgrade, Central Serbia, Serbia

Business Consulting and Services · 201-500 employees

12 h ago
java Senior (5-10 yrs) Full-time Serbia
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About the role

Design, develop, and maintain backend services and APIs using Java and Spring. Collaborate with cross-functional teams to deliver secure, scalable, and high-quality software solutions.

What they look for

Java Spring Quarkus RabbitMQ Keycloak PostgreSQL Docker Testcontainers Microservices REST API Integration testing API design Backend development

Requirements

Requires strong hands-on experience with Java 17+ and the Spring framework. Proficiency in PostgreSQL, RabbitMQ, and containerization tools like Docker is essential.

Full description

Are you ready to build end-to-end solutions that make an impact?

Your Role & Responsibilities

  • Design, develop, and maintain backend services and APIs using Java 25 and Spring
  • Contribute to select services built on Quarkus
  • Build and maintain asynchronous, event-driven communication between services using RabbitMQ
  • Implement and maintain authentication and authorization flows via Keycloak, including custom SPIs
  • Design and optimize data models and queries in PostgreSQL
  • Write integration tests using Docker and Testcontainers to ensure reliable, reproducible builds
  • Develop and maintain integrations with third-party services and external APIs
  • Collaborate with product, QA, and DevOps to deliver secure, scalable, high-quality software
  • Participate in code reviews, architecture discussions, and continuous improvement of engineering practices

Required Technical & Professional Expertise

  • Strong hands-on experience with Java (Java 17+, ideally Java 21/25) and the Spring framework
  • Solid experience with PostgreSQL (schema design, performance tuning, migrations)
  • Experience with RabbitMQ
  • Familiarity with Keycloak, including writing custom SPIs
  • Experience with Docker and Testcontainers for integration testing
  • Experience integrating with third-party / external APIs and services
  • Solid understanding of microservice architecture and REST API design
  • Exposure to Quarkus is a plus

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