Company

Country

Poland

Industry

Telecommunications

System

CRM system

Executive summary

01

Client

T-Mobile Poland – a major telecommunications operator with over 11 million clients.

02

The core challenge

The sales team used three separate CRM systems, resulting in an inefficient sales process, onboarding difficulties, and operational risks during updates.

03

Solution delivered

Pretius designed and implemented a modern, custom-built CRM platform based on microservice architecture that consolidated sales tools into a single, scalable system.

Key outcomes:

Simplified sales process

350+ independent modules enabling flexible updates

Zero downtime for improvements

Long-term strategic collaboration between T-Mobile and Pretius

Client background

T-Mobile Poland is one of the largest mobile telecommunications providers in the country, serving over 11 million users.

As a market leader, the company continuously strives to optimize internal operations and improve customer service to maintain its competitive edge. A critical part of this effort lies in equipping sales teams with the right tools to manage customer relationships efficiently.

The Business Challenge: Replacing the old sales stack

T-Mobile’s sales consultants were operating within three separate CRM systems. This fragmented environment led to a series of issues:

A complex and inefficient sales process

Longer onboarding times for new employees

High risk of downtime when updating functionalities

Difficulty in scaling the system to meet growing demand

For a company experiencing dynamic growth, such operational obstacles were unacceptable. T-Mobile needed a future-proof CRM platform that would not only centralize the sales process but also ensure system stability and flexibility during continuous development.

Technologies That Powered the Transformation

Java

Angular

Oracle DB

PostgreSQL

The solution provided by Pretius:

Recognizing Pretius’s experience in delivering enterprise-grade software solutions, T-Mobile engaged the team to deliver a next-generation CRM platform that replaced the three previously used solutions.

Key steps:

In-depth business analysis conducted by Pretius analysts and architects.

Development of a custom CRM system replacing all three legacy systems.

Use of modern microservice architecture, enabling flexibility and scalability.

Delivery of 350+ independent modules, each serving a specific business function.

The project was executed by a dedicated team of 2 Project Managers, 2 Business Analysts, 1 Software Architect, 6 Software Developers, and 2 Software Testers.

Measured outcomes and business impact

Foundational operational improvements

Unified sales platform: All customer data and tools are now available in one place.
Faster onboarding: New employees can quickly adapt to the system.
Zero downtime updates: Thanks to the microservice-based architecture, updates no longer interrupt business operations.
Improved maintainability: Each of the 350+ modules can be developed or modified independently.

Strategic and commercial value

Enhanced efficiency: Sales consultants can now create offers faster and work more effectively.
Future-proof system: Modular architecture allows easy scaling and adaptation to new business needs.
Long-term collaboration: The success of the CRM project reinforced the strategic partnership between Pretius and T-Mobile, paving the way for new joint software initiatives.

Clients of T-Mobile in Poland

Modules in the new system

years

Of partnership between T-Mobile and Pretius

Client testimonial

Artur Męcina

IT Manager at T-Mobile Poland

The most important thing about Pretius is that they care to understand your business goals. And, having a bunch of enterprise-grade and SME-grade projects under their belt, they’re very good at it.