Billing Systems Engineer (Comarch BSS) — Impact & Growth

InPost; Kraków; On-site; PLN 120,000 - 180,000; Full time

Benefits offered by this job

B2B contract

Job summary

InPost is seeking a Billing System Engineer to develop and ensure the stability of its billing systems integrated with the Comarch BSS platform. You’ll work on Product Catalog, Billing and Billing Mediation, monitor performance and investigate data issues to ensure end-to-end data integrity.

You’ll collaborate with engineers and business teams across international markets to upgrade the billing platform, implement new functionalities, and maintain technical documentation.

Qualifications

• At least three years of experience with Comarch BSS, particularly Product Catalog, Billing or Billing Mediation.
• Use SQL for data analysis, record tracing and troubleshooting.
• At least two years of experience with enterprise system integrations and integration tools.
• Understand billing processes, including invoicing, rating and usage-based billing.
• Familiar with Oracle or PostgreSQL databases and Elasticsearch.
• Practical experience with Linux, REST API testing and Apache Kafka.
• Communicate in English and Polish at B2 level or higher.

Responsibilities

• Maintain and configure the Comarch BSS platform, including Product Catalog, Billing and Billing Mediation.
• Monitor platform performance, system jobs, error logs and runtime incidents.
• Investigate data issues and identify root causes.
• Monitor system interfaces and integrations to ensure uninterrupted end-to-end data flows.
• Support backup and recovery processes and strengthen system availability.
• Configure data connections and integrations and take technical ownership after implementation.
• Support audit controls, security requirements and compliance activities.
• Follow the BSS roadmap, run proofs of concept and maintain technical documentation.
• Contribute to platform upgrades, patches, new functionalities and issue resolution.

Skills

Comarch BSS

SQL

Linux

REST API testing

Apache Kafka

Elasticsearch

Oracle / PostgreSQL

Kubernetes

English & Polish (B2+)

Tools

Comarch BSS (Product Catalog / Billing Mediation)

Oracle

PostgreSQL

Elasticsearch

Kafka

REST API

Linux

Job description

InPost is seeking a Billing System Engineer to develop and ensure the stability of its billing systems integrated with the Comarch BSS platform. You’ll work on Product Catalog, Billing and Billing Mediation, monitor performance and investigate data issues to ensure end-to-end data integrity.

You’ll collaborate with engineers and business teams across international markets to upgrade the billing platform, implement new functionalities, and maintain technical documentation.