As part of replacing an outdated budget tracking system, which had become obsolete and required accountants to perform a large portion of the calculations manually in Excel,I led and supervised a complete overhaul of the solution following an in-depth user requirements analysis.

Objectives:

Automate complex fee calculations

Eliminate manual processing

Provide a robust, maintainable, and customizable tool adaptable to different real estate projects

Technical Achievements:

Backend development: Symfony 6.4 with API Platform 4.1 to expose fully documented REST APIs

Frontend development: Angular 19 with Angular Material for a modern and user-friendly interface

Asynchronous communication: Symfony Messenger with Doctrine Transport to process data from an ETL related to real estate project progress reports, along with several other asynchronous use cases

Business modeling: Implementation of nested workflows to represent the various validation, customization, and availability states of fee lines

Front/back synchronization: Automatic generation of OpenAPI clients on the frontend to ensure TypeScript type consistency and improve API documentation

Automated testing: Unit tests using PHPUnit on the backend and Karma/Jasmine on the frontend

Advanced user interfaces: Nested forms enabling the creation and fine-grained customization of fee matrices

Extensible architecture: Implementation of a registry pattern to manage the different calculation methods for fee lines, turning these methods into resources that improve the system’s maintainability and extensibility

Results:

Significant time savings for end-users

Drastic reduction in calculation errors

Increased system reliability, traceability, and scalability