Successful Microservice Migration
Transitioned from monolithic to microservice architecture, increasing system scalability and deployment efficiency.
Technologies used
Kotlin
Java
Spring Boot 2-3
Redis
Openshift
Spring Webflux
Project Reactor
Apache Kafka
IBM MQ
ActiveMQ Artemis
Swagger
Wiremock
TestContainers
Motivation
The client needed a modern banking platform for SMEs because their legacy monolithic system was inflexible, caused performance bottlenecks, and lacked tools for efficient payment processing, account management, and reporting. The goal was to deliver a scalable, resilient, and high-performance system that could handle increasing transaction volumes, improve operational efficiency, and ensure uninterrupted service during peak financial periods.
Main challenges
Challenge 01
Transition from Monolith to Microservices
The legacy monolithic architecture limited flexibility and scalability. Azati led the migration to a microservices-based structure, significantly enhancing modularity and performance.
#1
Challenge 02
Ensuring Stability and 24/7 Availability
The system had to maintain high availability and reliability, especially during peak times such as tax periods and holidays. Load testing and incident response processes were established to ensure readiness.
#2
Challenge 03
Handling Growing Payment Volumes
The system scaled from processing 10,000 payments per month to over 1 million per day. Performance optimization and architecture redesign were key to supporting this growth.
#3
Our approach
Team Leadership and Sprint Management
As a Team Lead, Azati’s specialist managed sprint planning, task distribution, and technical supervision across a cross-functional team of 5 developers, 2 QA engineers, 2 PMs, and 1 architect, ensuring timely delivery and smooth collaboration.
Development and Performance Optimization
Led the development of new features, maintained and refactored legacy code, and performed deep system optimizations to improve performance, scalability, and reliability under high-load conditions.
Code and Requirements Review
Ensured code quality and alignment with business needs through systematic code reviews, validation against requirements, and close collaboration with product stakeholders.
Client Communication and Incident Response
Maintained direct communication with the client to resolve production issues, provide rapid incident response, and support critical operations without service interruptions.
Collaborative Architecture Design
Worked closely with the system architect to define and implement scalable, modular solutions, shared across multiple teams, enabling smooth transition to microservices and improved system flexibility.
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01
Multichannel Payment Support
Enables SMEs to create and manage payment orders across various channels, streamlining financial operations and providing flexible tools for different payment types.
Key capabilities:
- Payment creation across online, mobile, and batch channels
- Support for recurring and one-time payments
- Integration with bank clearing systems and APIs
- Real-time status tracking of all payment operations
02
Account and Card Information
Provides users with up-to-date account balances, card details, and comprehensive transaction history, improving transparency and control over financial data.
Key capabilities:
- Real-time account balance updates
- View and manage multiple business accounts
- Detailed card and transaction information
- Search and filter historical transactions for auditing
03
Dynamic Reporting
Allows generation of detailed financial reports in multiple formats for internal management and regulatory compliance, enabling faster insights and decision-making.
Key capabilities:
- Customizable reports for payments, accounts, and balances
- Export in PDF, Excel, or CSV formats
- Automated scheduled report generation
- Data aggregation for compliance and auditing purposes
04
Microservices Architecture
Refactored the platform from a monolithic system to microservices, improving scalability, deployment flexibility, and fault isolation, supporting rapid feature growth.
Key capabilities:
- Independent deployment of individual services
- Fault isolation and improved system reliability
- Scalable architecture to handle increasing loads
- Clear separation of business logic for maintenance
05
High-Performance Messaging
Integrated Apache Kafka and MQ solutions to enable reliable asynchronous communication and ensure smooth transaction processing under high load.
Key capabilities:
- Asynchronous messaging between services
- Reliable transaction processing
- Real-time event streaming for financial updates
- Integration with multiple backend systems and services
06
Production Monitoring and Support
24/7 monitoring and incident management to ensure system stability, rapid response to issues, and uninterrupted financial services for SMEs.
Key capabilities:
- Continuous monitoring of system health and transactions
- Proactive incident detection and resolution
- Load testing before high-traffic periods
- Alerting and reporting for operational oversight
Results & business impact
Enhanced Stability and Uptime
Improved system resilience, reduced production incidents, and ensured uninterrupted financial services.
High-Load Readiness
Prepared the system for peak seasons, enabling smooth operation during high-traffic periods like tax payouts.
Accelerated Development Cycle
Streamlined development and testing workflows, reducing release times and improving delivery speed.
Massive Throughput Growth
Scaled the system from 10,000 monthly payments to over 1 million daily, showcasing robust architectural evolution.
Technological Modernization
Migrated the system to Java 17 and replaced foreign software with domestic alternatives, aligning with import substitution initiatives.
