Billing Systems Engineer - Stabilize & Evolve Complex BSS

InPost; Kraków; On-site; PLN 180,000 - 240,000; Full time

Benefits offered by this job

Impact on billing

Complex systems

Technical ownership

International environment

Broad tech landscape

Proof of Concept

Full-time contract

Job summary

InPost is seeking a Billing System Engineer to develop and ensure the stability of our billing systems, working with the Comarch BSS platform. This role combines technical depth with business process understanding to improve reliability and future development of billing solutions.

You will manage Product Catalog, Billing, and Billing Mediation, monitor performance, investigate issues, and own integrations while supporting audits and security requirements in an international environment.

Qualifications

• Minimum three years of experience with Comarch BSS, notably Product Catalog, Billing or Billing Mediation.
• Fluent in SQL for data analysis, tracing and troubleshooting.
• At least two years of experience with enterprise system integrations and integration tools.
• Understanding of 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.
• English at B2 level or higher.

Responsibilities

• Maintaining and configuring the Comarch BSS platform, particularly Product Catalog, Billing and Billing Mediation.
• Monitoring platform performance, system jobs, error logs and runtime incidents.
• Investigating data issues and identifying their root causes.
• Monitoring system interfaces and integrations to ensure uninterrupted end-to-end data flows.
• Supporting backup and recovery processes and solutions that strengthen system availability.
• Configuring data connections and integrations and taking technical ownership after implementation.
• Supporting audit controls, security requirements and compliance-related activities.
• Following the BSS roadmap, running Proofs of Concept and maintaining technical documentation.
• Contributing to platform upgrades, patches, new functionalities and technical issue resolution.

Skills

SQL usage

English communication

Root-cause analysis

Tools

Comarch BSS

Product Catalog

Billing

Billing Mediation

Oracle

PostgreSQL

Elasticsearch

Linux

REST API testing

Apache Kafka

Kubernetes

Apache Cassandra

Job description

InPost is seeking a Billing System Engineer to develop and ensure the stability of our billing systems, working with the Comarch BSS platform. This role combines technical depth with business process understanding to improve reliability and future development of billing solutions.

You will manage Product Catalog, Billing, and Billing Mediation, monitor performance, investigate issues, and own integrations while supporting audits and security requirements in an international environment.