Billing System Engineer - Comarch BSS
Job description
A Billing System Engineer role at InPost focused on maintaining, configuring and developing the Comarch BSS billing platform, combining technical expertise with an understanding of business processes. The role is for someone who enjoys complex system environments, root-cause analysis and improving the reliability of billing solutions.
At a glance
- Employment
- Independent contractor
- Work mode
- Remote · Poland
- Languages
- English – B2, Polish – B2
What you'll do
- 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
What we're looking for
- 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
- Actively uses AI tools such as ChatGPT, Claude or GitHub Copilot
Nice to have
- 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
Benefits
The opportunity to work with complex, business-critical systems and solve challenges that matter to day-to-day operations
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 further evolution of the billing platform
- A real impact on the stability, development, and future direction of our billing solutions
- Space to bring your expertise, propose improvements, and take technical ownership of the solutions you work on
- Collaboration with experts across technology and business areas in an international environment
- B2B contract
Apply
Direct apply at InPost
Opens the job posting at InPost
About InPost
InPost's extensive OOH network supports rapidly growing parcel volumes across its markets, with 1.4 billion parcels delivered in 2025. Its locker solutions offer consumers a delivery option that is cheaper, more flexible and convenient, environmentally friendly and contactless. As a leading OOH logistics provider, InPost is recognised for transforming parcel delivery economics in Europe, appealing to both consumers and merchants through its flexible, technology-driven solutions.
Key facts
- OOH logistics / parcel delivery
- 1.4 billion parcels delivered in 2025
- Extensive OOH network across its markets
- Locker solutions offering cheaper, more flexible, convenient, environmentally friendly and contactless delivery