Polski Światłowód Otwarty (PŚO) is a wholesale operator that offers all retail operators open access to the broadband network in Poland on equal and non-discriminatory conditions. Currently, services provided on the PŚO infrastructure include: Netia, Orange, Play, Plus and T-Mobile The coverage of the PŚO network already covers over 4.1 million households, and in the future it is planned to expand this number to over 6 million.
For this purpose, the company is intensively expanding and modernizing its infrastructure, implementing the latest technology in the XGS-PON standard. Thanks to it, retail operators will be able to offer their customers FTTH internet services with speeds of up to 5 Gbit/s.

Project objective:
The key challenge for the new organization was to develop a modern, flexible data warehouse system in the cloud that would allow for the management of operational, analytical and reporting data in an automated and scalable manner.
Scope of work
- Design and implementation of Data Lake architecture:
- Together with the client's team, we created the Data Lake concept in GCP, ensuring flexibility and low maintenance costs.
- We have built a DWH structure with the possibility of easy integration with new data sources.
- Integration of 13 source systems:
- Our team has implemented ELT processes for relational and non-relational databases (SQL Server, PostgreSQL, Oracle, MongoDB).
- We have implemented a mechanism that allows you to dynamically add new data refresh processes to the orchestration implemented by Cloud Composer (Airflow).
- Process automation and monitoring:
- We have created mechanisms for automatically generating table structures in BigQuery.
- We have implemented a logging and monitoring system in Cloud Logging.
- Reporting and analytics optimization:
- We have built a data model that constitutes one, consistent source of truth for the entire organization.
- Together, we implemented KPIs and analytical tools to support business decisions.
- Security and access policy:
- We have implemented access control and automatic assignment of Policy Tags.
- We have integrated the solution with VPN for secure communication between systems.

Results
Key results:
- Instant access to data: The client gained full independence in reporting and data analysis.
- Effective data management: Possibility of automatic integration of new systems in the Data Lake.
- Cost savings: Elimination of the need to invest in on-premise infrastructure.
- Readiness for future needs: The system enables quick implementation of the event-driven model and scaling for growing volumes of processed data.
Business value:
- The client avoided the need to build expensive local infrastructure.
- Possibility of flexible development of the reporting and analytics system, without the need to involve external suppliers for each change.
- Automation of ETL processes allowed the Data team to effectively manage data with minimal effort.
Client feedback
Thanks to cooperation with Alterdata, we have created a modern data ecosystem that not only supports our organization in everyday operations, but also enables its further dynamic development.
Thanks to cooperation with Alterdata, we have created a modern data ecosystem that not only supports our organization in everyday operations, but also enables its further dynamic development.
Summary
The construction of a data warehouse in Polski Światłowód Otwarty is an example of effective implementation of a modern cloud architecture, adapted to the dynamic needs of a developing organization.
Thanks to the GCP-based solution, PŚO gained full independence in reporting, increased operational efficiency and created solid foundations for further digitization of business processes.
If your organization needs a modern, scalable cloud data warehouse that provides full control over your data and readiness for further growth, please contact us. We will help you design and implement a solution tailored to the real needs of your business.