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Modernization and Feature Enhancement of Kontomierz Personal Finance Management Platform

leancode.co

Financial services

Information technology

Fintech

Legacy System Limitations and Market Competitiveness

The existing Kontomierz application's outdated architecture and design hindered further development, while increasing market competition required enhanced features to maintain relevance in the growing PFM software sector. The system needed modernization to support scalable financial data processing and improved user engagement.

About the Client

Digital product owner specializing in personal finance management solutions

Strategic Modernization Goals

Create a modern, user-centric interface with improved financial data visualization
Implement scalable backend architecture for efficient transaction processing
Introduce subscription-based monetization model
Enhance financial categorization intelligence and customization capabilities
Ensure seamless data migration from legacy systems

Core System Requirements

AI-powered transaction categorizer with customizable categories/subcategories
Interactive budget planning with real-time limit monitoring
Visual financial analytics dashboard with multi-dimensional data visualization
Secure open-banking integration for transaction synchronization
Demo mode with full feature access for user acquisition
Subscription management system with recurring payment tracking

Technology Stack Requirements

React for frontend development

Node.js with TypeScript for backend

State machine sagas for transaction processing

Microservices architecture for ETL processes

Design System implementation for UI consistency

Critical System Integrations

Kontomatik open-banking API
Stripe payment processing
BillTech subscription management
Ory Kratos authentication system

System Quality Requirements

High-volume transaction processing scalability
Real-time financial data synchronization performance
Multi-tenancy security architecture
Cross-browser compatibility with progressive enhancement
99.9% system availability SLA

Expected Business Outcomes

Position Kontomierz as a market-leading PFM solution with 30% faster financial data processing, 50% improved user retention through enhanced UX, and 200% increased revenue potential via subscription monetization. The modernized architecture will support 10x user growth while maintaining compliance with financial data regulations.