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I’ve just completed Invoice Manager — a production-ready Windows desktop application built with .NET 10, C#, WPF, MVVM, EF Core and SQLite.
The application covers the full workflow from quotation to payment, including:
• customer and service management
• quotations and invoices
• quote-to-invoice conversion
• partial and full payments
• PDF generation
• dashboard reporting
• historical document snapshots
• automated testing and CI
The project was built with Clean Architecture and includes 97 automated tests, a self-contained Windows release, technical documentation and architecture decisions.
This project gave me a chance to work not only on the UI, but also on business rules, persistence, transactional workflows, testing and release engineering.
#dotnet #csharp #wpf #softwaredevelopment #desktopapp #cleanarchitecture
github.com
GitHub - Staniek-Tech-NL/invoice-manager: Local-first quotation and invoicing application for Windows built with .NET 10, WPF and Clean Architecture.
Local-first quotation and invoicing application for Windows built with .NET 10, WPF and Clean Architecture. - Staniek-Tech-NL/invoice-manager
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Designed a modern Finance Dashboard.
Clean and professional UI with real-time balance overview, spending insights, cash flow charts, transaction history, and smart analytics for better financial control.
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What a clean work🔥
Case Study: From Manual Workflow to Automated Business System
Many business processes don't start as complex systems.
They often begin with a simple spreadsheet.
Client data goes into one file.
Tasks are tracked somewhere else.
Proposals are created manually.
Invoices are generated separately.
Files are stored across different folders.
As the workload grows, managing everything becomes increasingly difficult.
A structured Google Workspace automation workflow can connect these processes into one system:
🔹 Centralized CRM — Manage leads and client information in one place.
🔹 Automated Proposals — Generate professional proposal documents from structured data.
🔹 Workflow Tracking — Monitor project stages, tasks, and follow-ups.
🔹 Automated Documents — Generate PDFs and business documents without repetitive manual work.
🔹 Dashboard Analytics — Turn operational data into useful business insights.
🔹 Google Workspace Integration — Connect Sheets, Drive, Gmail, Docs, and Calendar.
The biggest improvement isn't simply making the interface look like software.
It's creating a workflow where data moves automatically between the processes that matter.
Less manual work.
Fewer disconnected tools.
Better visibility.
More time to focus on the business.
This is the approach I use when designing Google Workspace automation systems: understand the workflow first, then build the technology around it.
What part of your current workflow would benefit most from automation?
I designed, built, deployed, and operated a custom CRM and outbound-calling system used for real prospecting and sales. The system handles FMCSA/watchlist refresh, enrichment, prioritized call queues, company records, full call history, outcomes, corrections, follow-ups, appointments, qualification and handoff flows, dashboards, and email operations. I owned the workflow from business requirements through implementation, deployment, operation, debugging, and ongoing improvement.
