Billing System Engineer (m/f/n)

InPost

4d

About The Position

InPost is seeking a Billing System Engineer to develop and maintain the stability of its billing systems. The role focuses on the Comarch BSS platform, particularly Product Catalog, Billing, and Billing Mediation, and combines technical expertise with an understanding of business processes. The successful candidate will investigate issues in a complex system environment and contribute to the reliability and future development of billing solutions.

The role involves monitoring platform performance, system jobs, error logs, runtime incidents, interfaces, and integrations; investigating data issues and their root causes; and supporting backup, recovery, availability, audit, security, and compliance activities. The engineer will configure data connections and integrations, take technical ownership after implementation, follow the BSS roadmap, conduct Proofs of Concept, maintain technical documentation, and contribute to upgrades, patches, new functionality, and technical issue resolution.

The position uses AI tools such as ChatGPT, Claude, or GitHub Copilot to support activities including log analysis, SQL query generation and optimization, technical documentation, and initial diagnosis of system issues. It is a full-time employment contract.

Requirements

• At least three years of experience with Comarch BSS, particularly Product Catalog, Billing, or Billing Mediation.
• Ability to use SQL for data analysis, record 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.
• Familiarity with Oracle or PostgreSQL databases and Elasticsearch.
• Practical experience with Linux, REST API testing, and Apache Kafka.
• English communication skills at B2 level or higher.
• Active use of AI tools such as ChatGPT, Claude, or GitHub Copilot.

Nice To Haves

• Experience with enterprise systems such as CRM, ERP, data warehouses, or event-streaming solutions.
• Knowledge of Apache Cassandra.
• Knowledge of Kubernetes.
• English proficiency at C1 level.

Responsibilities

• Maintain and configure the Comarch BSS platform, particularly Product Catalog, Billing, and Billing Mediation.
• Monitor platform performance, system jobs, error logs, and runtime incidents.
• Investigate data issues and identify their root causes.
• Monitor system interfaces and integrations to ensure uninterrupted end-to-end data flows.
• Support backup and recovery processes and solutions that strengthen system availability.
• Configure data connections and integrations and take technical ownership after implementation.
• Support audit controls, security requirements, and compliance-related activities.
• Follow the BSS roadmap, run Proofs of Concept, and maintain technical documentation.
• Contribute to platform upgrades, patches, new functionalities, and technical issue resolution.
• Use AI tools to support log analysis, SQL query generation and optimization, technical documentation, and initial diagnosis of system issues.

Benefits

• A real impact on the stability, development, and future direction of the billing solutions.
• Opportunity to work with complex, business-critical systems and solve challenges that matter to day-to-day operations.
• Space to bring expertise, propose improvements, and take technical ownership of solutions.
• Collaboration with experts across technology and business areas in an international environment.
• Exposure to a broad technology landscape, including Comarch BSS, system integrations, databases, APIs, and event-driven solutions.
• Opportunities to explore new technologies, run Proofs of Concept, and contribute to the evolution of the billing platform.

What This Job Offers

• Job Type: Full-time
• Education Level: No Education Listed