Java Developer

8 hours ago

Belgrade, Central Serbia Zenith System Solutions Full time €25,000 - €50,000 per year

Company Description

Zenith System Solutions is a global IT services and software company with over 25 years of industry experience. Our company specializes in delivering high-impact solutions to telecom and financial services clients. We have over 200 seasoned experts across geographies, and our capabilities span from business-critical systems to modern digital platforms. Clients choose Zenith for our deep telecom and BFSI experience, global delivery model, and cost-effective, scalable, and high-quality delivery. We work as an extension of your team, offering the flexibility of a boutique partner with the maturity of an enterprise-grade provider.

Key Responsibilities

  • Design, develop, test, deploy, and maintain backend services and
    APIs using Java.
  • Build scalable, secure, and maintainable enterprise-grade applications.
  • Ensure system performance, responsiveness, and reliability.
  • Collaborate with cross-functional teams (QA, DevOps, Product Owners) to deliver features on time.
  • Integrate internal and external systems via
    REST APIs,
    messaging queues, and other mechanisms.
  • Debug, troubleshoot, and resolve production issues.
  • Write clean, well-documented, and testable code, following best practices and coding standards.
  • Participate in code reviews and contribute to technical documentation.
  • Monitor and optimize application performance, identifying and addressing bottlenecks.

Requirements

  • Strong hands-on experience with
    Java SE/EE
    and frameworks such as
    Spring Boot, Hibernate/JPA
    .
  • Solid knowledge of relational databases (
    MySQL, PostgreSQL, Oracle
    ).
  • Proven experience in
    RESTful API design and development
    .
  • Familiarity with build tools (
    Maven, Gradle
    ) and version control (
    Git
    ).
  • Experience working in
    Agile/Scrum
    environments.

Nice to Have

  • Experience with
    microservices architecture
    .
  • Exposure to
    message brokers
    (RabbitMQ, Kafka).
  • Knowledge of
    CI/CD pipelines
    and
    cloud platforms
    (AWS, Azure, GCP).
  • Experience mentoring junior developers.

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