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Salary
$64k – $77k per year
Location
In office (Warsaw)
Seniority
Middle · 4+ years exp
Employment
Full-Time
Overview
Company
Impact
Profile match

Sii

Sii is a Polish company in the information technology and engineering services sector. It provides software development, testing, business process outsourcing, and engineering solutions for clients in industries such as finance, telecommunications, automotive, and manufacturing.

We are looking for an experienced Java Cloud Developer to join a dynamic team delivering modern digital solutions for business clients. You will be part of a product area focused on virtual card services and digital platforms that support innovative business models such as Click & Collect and fleet management solutions.

Those systems enable end-to-end management of payments and communication with business customers, including fueling, car wash services, invoicing, and card/account management. The portfolio spans both mobile and web applications, as well as external APIs (e.g., Payment-as-a-Service), serving primarily Scandinavian and Baltic markets. You'll work across a mix of greenfield development and enhancements to existing systems.

Your tasks

  • Design and implement new features and system improvements

  • Ensure software quality through testing and validation against requirements

  • Diagnose, troubleshoot, and resolve technical issues

  • Collaborate with cross-functional teams in an agile environment

  • Participate in team ceremonies and contribute to technical discussions

  • Prepare and maintain technical documentation

Requirements

  • At least 4 years of hands-on experience in Java development

  • Strong knowledge of frameworks and tools: Spring (Boot, Data, Cloud), JUnit, Spock, JPA, Hibernate

  • Solid experience with PostgreSQL, SQL, NoSQL databases, and Redis

  • Practical experience with cloud and containerization technologies (Azure, Kubernetes, Docker)

  • Experience building and integrating REST/SOAP APIs, including Swagger/OpenAPI documentation

  • Familiarity with CI/CD and development tools: Jenkins, SonarQube, Git, Gradle

  • Very good communication skills in both English and Polish

  • Residing in Poland required

Nice-to-have requirements

  • Knowledge of TDD/BDD practices, e.g., Spock, Mockito, Cucumber

  • Basic understanding of Domain-Driven Design (DDD)

  • Familiarity with service mesh architectures

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