Java Software Engineer - Billing DB Migration to PostgreSQL

Inetum Polska; Poznań; Hybrid; PLN 180,000 - 240,000; Full time

Benefits offered by this job

Hybrid work model

Job summary

Inetum Polska is seeking a Java Software Engineer to join our Billing team. The primary task is migrating the database from Sybase to PostgreSQL without functional changes, followed by maintaining REST interfaces to support ongoing operations.

You will work with Java 17/21, Spring Boot, PostgreSQL and related tools in a collaborative, hybrid environment. Fluent English and Polish communication are required, along with strong analytical and coding skills.

Qualifications

• Proficiency in Java 17/21 and Spring ecosystem.
• Experience with PostgreSQL and Sybase databases.
• Familiarity with REST interfaces, Maven and JUnit.
• Comfort with DevOps tools such as Kubernetes/Jenkins/SonarQube/OpenAPI.
• Excellent written and spoken English and Polish.

Responsibilities

• Migrate the database from Sybase to PostgreSQL within the Billing system without changing existing functionality.
• Implement and maintain REST interfaces after migration.
• Collaborate with cross-functional teams to ensure integration and performance.
• Conduct technical analysis of current systems and business logic for migration.
• Develop and maintain high-quality code following best practices.

Skills

Java 17/21

Spring Boot

Spring JDBC

REST APIs

Maven

JUnit

English proficiency

Polish proficiency

Tools

Kubernetes

Jenkins

SonarQube

OpenAPI/Swagger

Job description

Inetum Polska is seeking a Java Software Engineer to join our Billing team. The primary task is migrating the database from Sybase to PostgreSQL without functional changes, followed by maintaining REST interfaces to support ongoing operations.

You will work with Java 17/21, Spring Boot, PostgreSQL and related tools in a collaborative, hybrid environment. Fluent English and Polish communication are required, along with strong analytical and coding skills.