Telekom FTTH: From Integration Chaos to an Agile Microservice Architecture

The Challenge

Telekom faced a critical modernization task for its FTTH business: moving from the old SAP C4C (V1) to the new Sales Cloud V2 was essential to remain agile. However, the project was blocked by a massive legacy issue.

• Monolithic Integration Layer: Over the years, the SAP Integration Suite had been misused not just for pure data integration, but also for countless business processes and logic.
• High Technical Debt: This misuse led to an extremely complex and opaque architecture. Every change was risky and time-consuming.
• Migration Deadlock: A simple migration to Sales Cloud V2 was impossible. The entire integration mess would have been carried over, nullifying the benefits of the new platform.
• Lack of Agility: The rigid architecture prevented the rapid introduction of new products or the adaptation of sales processes, which was a major obstacle in the dynamic FTTH market.

A partner was needed who would not just treat the symptoms but cure the underlying architectural disease.

The Solution

Our approach was primarily strategic and architectural. Instead of attempting a direct migration, we tackled the problem at its root.

• Strategic Decoupling: First, we analyzed the overloaded Integration Suite and identified all the business processes that had been incorrectly implemented there.
• Designing the Microservice Architecture: We designed a new, decoupled target architecture. The misplaced business logic was refactored into independent, clean microservices on the SAP Business Technology Platform (BTP).
• Guided Migration: Only after this clean foundation was established did we guide the actual migration to Sales Cloud V2. The new platform was connected not to the old chaos, but to the new, clean microservice landscape.
• Consulting and Implementation from a Single Source: We took on both the conceptual leadership role and the operational implementation to ensure the architectural vision was precisely realized.

We released the brakes before stepping on the gas.

The Results

By fundamentally re-architecting the system, the Telekom FTTH unit received much more than just a system update.

• True Agility: New features and processes can now be developed and deployed quickly in dedicated microservices without jeopardizing the entire platform. The time-to-market was cut in half.
• Elimination of Technical Debt: The Integration Suite now serves its intended purpose again. The system landscape is clean, maintainable, and transparent.
• Future-Proof Platform: The decoupled architecture allows Telekom to react flexibly to future requirements and easily integrate new technologies.
• Successful V2 Migration: The migration to Sales Cloud V2 was completed smoothly and successfully because the biggest hurdle had already been removed.

This project was not a mere migration, but a strategic modernization that provides Telekom with a sustainable foundation for success in the fiber optics market.