Improved System Reliability
The monolithic service delivered stable and predictable performance under high-load conditions, minimizing downtime and errors.
Technologies used
Spring
Spring Kafka
Liquibase
Kotlin
Java
Mockito
Groovy
RabbitMQ
Motivation
The telecom provider faced unreliable product-management operations: slow balance calculations, unpredictable product eligibility results, and unstable VAS integrations caused customer dissatisfaction and operational overhead. The client approached Azati to redesign the backend into a resilient, high-performance monolithic system that could process complex telecom logic, withstand high load peaks, and reduce errors in product activation workflows.
Main challenges
Challenge 01
Slow Access and Internal Dependency Bottlenecks
Access to several core systems required approval and routing through a dedicated internal department, causing delays during integration and testing. These slowdowns created development bottlenecks and interfered with maintaining stable delivery velocity. Azati streamlined communication workflows and established structured coordination practices, minimizing the impact of these delays on development efficiency.
#1
Challenge 02
Highly Complex Product Interdependencies
Telecom products often have layered compatibility rules, bundled dependencies, upgrade/downgrade logic, and cross-product restrictions. Managing this complexity within legacy business logic frequently caused inconsistent results and incorrect product eligibility outcomes. Azati introduced modular separation of responsibilities and standardized computation models to ensure predictable and accurate processing of product relationships.
#2
Challenge 03
Cache Performance Issues Under High Load
The existing system experienced long cache warm-up times and inconsistent cache behavior during peak traffic. This resulted in slow calculations, delayed product activation, and poor user experience. Azati implemented optimized cache strategies and redesigned warm-up mechanisms, ensuring stable performance and reduced latency after deployments or restarts.
#3
Our approach
Structured Onboarding and Workflow Management
Azati conducted in-depth onboarding, domain interviews, and daily stand-ups to synchronize the team with the client’s architecture and processes. Workflows were supported with specialized task-tracking tools, enabling precise prioritization, transparent progress monitoring, and fast issue resolution.
Git Flow Workflow
A structured Git Flow branching model was implemented to ensure stability across multiple development streams. Mandatory code reviews, staging environment validations, and regression checks guaranteed high-quality deployments to production.
Modular System Development
Azati developed a monolithic system composed of well-isolated modules, including balance calculation, eligibility rules, product relationship logic, VAS integration, and core processing. This approach preserved monolith simplicity while enabling clear boundaries, maintainability, and future scalability.
Extensive Testing
The team created a comprehensive integration test suite covering new functionality, existing flows, and cross-module interactions. This provided a robust safety net for future changes, reducing regression risk and improving long-term system stability.
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Inquire for more infoSolution
01
Real-Time Balance Calculation
This module provides real-time, accurate calculation of customer balances by processing numerous transactions and ensuring up-to-date account information is always available for other system components and customer-facing applications.
Key capabilities:
- Immediate processing of multiple concurrent transactions
- Accurate and synchronized balances across services
- Minimized errors during high-load scenarios
02
Eligibility Rules Engine
Determines whether customers are eligible for specific products or services based on subscriptions, profiles, and promotional rules. This ensures correct product assignments and prevents invalid configurations.
Key capabilities:
- Automated eligibility determination based on dynamic rules
- Prevention of incompatible product activation
- Support for complex promotional and subscription scenarios
03
Core Processing & Coordination
Acts as the backbone of the monolithic system, coordinating interactions between modules, processing essential business logic, and ensuring consistent and reliable system behavior under high loads.
Key capabilities:
- Orchestration of inter-module operations
- Stable performance under high-load conditions
- Ensures accurate data propagation across modules
04
Product Relationship Management
Manages dependencies and bundled offers among various customer products, ensuring proper interactions and consistent application of business rules across all services.
Key capabilities:
- Management of product bundles and dependencies
- Support for multi-level product hierarchies
- Prevents logical conflicts across services
05
VAS Integration Layer
Seamlessly integrates Value-Added Services into the telecom platform, automating activation and configuration to enhance customer experience and reduce manual intervention.
Key capabilities:
- Seamless integration with external VAS platforms
- Automated activation and monitoring of services
- Reduced manual effort and fewer activation failures
Results & business impact
Enhanced User Experience
Optimized balance calculations, eligibility checks, and product management ensured smoother interactions for customers.
Operational Efficiency
Automated VAS integration and modular design reduced manual work and simplified maintenance for internal teams.
Scalability and Maintainability
Modular architecture allows future enhancements and extensions without impacting existing services.
Faster Response Times
Optimized cache and core processing modules improved system responsiveness, leading to better performance under peak usage.
