Developed a comprehensive enterprise invoice management system from the ground up, building both frontend and backend architecture including custom UI components, complex business logic calculations, and full-stack database integration tailored specifically for client workflow requirements
Development Deep Dive
The most complex challenge was implementing custom quote calculation algorithms with intricate business logic specific to the client's pricing model, requiring deep understanding of their cost variables and profit margins. Building the full-stack architecture with React (Vite) and Node.js (Next.js) demanded careful API design for seamless CRUD operations across users, companies, quotes, and invoices.
Multi-language support for English and French required comprehensive internationalization implementation across all UI components, database content, and generated PDFs. PDF generation and SignNow API integration with localized templates required complex document templating and secure email workflows for quote approval processes. The MySQL database design needed optimization for handling large datasets while maintaining fast query performance. Custom cryptography implementation for authentication ensured enterprise-level security, while building responsive table and graph components from scratch provided optimal user experience across different device sizes.
Work Management & Process
As a solo full-stack developer, I managed the entire project lifecycle from initial requirements gathering to Ubuntu server deployment and hosting configuration. Building both frontend interface and backend infrastructure required careful planning of API endpoints and database schema to support complex business operations with dual-language functionality.
The highly personalized features demanded extensive client consultation to understand specific workflow requirements and calculation methodologies in both languages. Server setup and hosting on Ubuntu involved configuring production environments, SSL certificates, and database optimization. Managing the complete technology stack from MySQL database to responsive multilingual frontend meant coordinating deployment cycles and ensuring seamless integration between all system components while maintaining enterprise-grade security and performance standards across English and French user experiences.
