We are looking for a Billing System Engineer to support and develop our billing platform (Comarch BSS) across the InPost Group. In this role, you will be responsible for the stability, configuration, and continuous operation of billing systems, ensuring reliable end‑to‑end data flows and supporting system expansion across European markets.

You will work closely with product, infrastructure, security, CRM, and data teams, as well as external vendors, translating complex technical topics into clear, actionable solutions.

What you will do

• Maintain and develop Comarch BSS (Product Catalog, Billing, Billing Mediation): configuration, updates, performance monitoring, and incident resolution.
• Monitor system processes, analyze logs, identify and resolve data and runtime issues.
• Ensure stability and continuity of system integrations and interfaces across the billing ecosystem.
• Manage backups, data recove...