What challenges did the billing system solve?

The system automated high-volume invoice processing, ensured accurate financial workflows, reduced manual errors, and integrated securely with external payment gateways.

How does the system handle large-scale invoice processing?

Batch processing using Spring Batch and asynchronous communication ensures efficient handling of thousands of invoices with retries and error handling for failed transactions.

What technologies were used?

The solution uses Java 8, Spring Boot, Spring Integration, Spring Batch, Hibernate, Liquibase, Groovy, MySQL Aurora, Docker, Jenkins, Jira, Confluence, and Kibana.

Can the system handle different client-specific billing rules?

Yes. Custom business logic and validation layers ensure accurate billing for multiple clients with varying rules and compliance requirements.

Automated Billing Management System

Azati developed a billing management module for a business platform serving public organizations. The system automates user registration, payment methods, invoicing, and batch payment processing, integrating seamlessly with web/mobile apps and external payment gateways.

Discuss an idea

70%

transaction capacity improvement

45%

operational efficiency

80%

reduction in financial processing

All Technologies Used

Java 8

Spring Boot

Spring Integration

Spring Batch

MySQL Aurora

Asciidoctor

Hibernate

Liquibase

Groovy

Mockito

Git

Docker

Jira

Confluence

Jenkins

Kibana

Motivation

The project aimed to develop a scalable and reliable billing management system for public organizations, automating high-volume invoice processing, integration with payment gateways, and reducing manual errors. The solution focused on operational efficiency, robust financial workflows, and seamless external API integration.

Main Challenges

The system had to efficiently process thousands of invoices in scheduled and event-driven batches. Azati implemented Spring Batch and asynchronous integration patterns to handle large-scale financial operations without downtime or bottlenecks.

Handling real-time and asynchronous communications with an external payment gateway required robust error handling and retries. The team implemented Spring Integration flows and retry mechanisms to ensure message delivery and processing.

Business rules varied across clients and had to be validated at multiple stages. Custom validation and calculation layers were developed within the service architecture to ensure accurate billing and compliance.

Our Approach

Agile-Based Development Process

The team followed Agile practices with clearly defined roles and processes. This included task estimation (poker board), grooming, retrospectives, and architecture discussions to align development with business goals.

Team Collaboration

Cross-functional team of 4 developers, 2 QA engineers, a team lead, a business analyst, a project manager, and a solution architect worked in close sync with constant communication and Q&A sessions.

Code Quality and Review Culture

Senior backend engineers participated in writing business-critical code, reviewing changes, optimizing SQL queries, negotiating API contracts, and improving database structures for better scalability.

Want a similar solution?

Just tell us about your project and we'll get back to you with a free consultation.

Schedule a call

Solution

Batch Invoice Processing Module

Handles scheduled and event-driven execution of large invoice flows, including payments, deposits, settlements, and retries. Designed to process thousands of invoices daily while maintaining system performance and reliability, crucial for high-volume banking operations.

Key capabilities:

High-volume batch processing using Spring Batch
Retry mechanisms for failed transactions
Automated payment settlements and reconciliation

Payment Gateway Integration Module

Manages secure, asynchronous communication with external payment systems and banking networks. Ensures reliable processing of transactions with minimal downtime, providing real-time updates and automated error recovery to support financial compliance and operational continuity.

Key capabilities:

Message-based integration for non-blocking communication
Error handling and automatic retries
Real-time payment status updates

Business Logic & Validation Module

Implements complex client-specific billing rules, multi-stage validations, and financial workflows. Ensures accuracy, regulatory compliance, and flexibility to accommodate diverse banking requirements, minimizing risk and errors in billing and payment processes.

Key capabilities:

Multi-stage validation for invoices and payments
Custom calculations for different client rules
Ensures compliance and accurate billing operations

REST API & Integration Layer

Exposes CRUD and reporting operations for billing entities, enabling seamless integration with external services, mobile/web applications, and internal banking systems. Supports secure and efficient data access while maintaining scalability and system stability.

Key capabilities:

Create, read, update, delete operations for billing and payment entities
Filter, sort, and search functionality for comprehensive data access
Supports integration with internal banking systems and third-party services

Business Value

Reliable and Scalable Billing System: The implemented solution successfully handled complex billing needs for public organizations and was capable of scaling with growing demand.

Improved Integration with Payment Gateways: Enabled seamless and secure money transfers, settlements, and automated payment retries through robust integration.

Optimized Business Processes: The automation of key billing processes reduced manual overhead and errors, thereby increasing overall efficiency and customer satisfaction.

Stable Operations through Asynchronous Processing: Reduced system downtime and load peaks with asynchronous communication and batch scheduling.

Knowledge-Driven Development: Regular architectural consultations and team rituals ensured high-quality deliverables aligned with long-term system goals.