Billing System Engineer - Comarch BSS (m/f/n)

InPost

3d

About The Position

InPost is seeking a Billing System Engineer to develop and ensure 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 work in a complex system environment, investigate issues to their root causes, and contribute to the reliability and ongoing development of billing solutions.

The position involves maintaining and configuring the platform; monitoring performance, jobs, logs, and runtime incidents; investigating data issues; and ensuring integrations support uninterrupted end-to-end data flows. It also supports availability, audit, security, and compliance activities, and contributes to the BSS roadmap, Proofs of Concept, documentation, upgrades, patches, new functionality, and technical issue resolution.

The role is offered on a B2B contract. InPost describes an international working environment and opportunities to collaborate with technology and business experts, take technical ownership, propose improvements, and explore new technologies.

Requirements

• 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.
• 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 and Polish 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 billing solutions.
• The 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

• Education Level: No Education Listed