C# ERP Developer - Saudi VAT Integration

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C# Developer Needed – Build Fast ERP System with Saudi VAT Stage 2 Integration

We are looking for a skilled C# developer or team to build a fast and modern ERP system, either:
• Desktop-based (WinForms or WPF)
OR
• Web-based SaaS (ASP.NET Core or Blazor)

Core Features Required:
• Customer and Supplier Management
• Sales, Purchases, Inventory Modules
• Invoice creation with full Saudi VAT Stage 2 (ZATCA) integration
• XML e-invoice generation, UUID, QR Code, SHA256 hash (as per ZATCA guidelines)
• Fast, responsive user interface
• Clean code with full source code handover

Technical Requirements:
• Strong experience in C# and .NET
• Familiarity with Saudi Arabia’s ZATCA e-invoicing requirements (Phase 2) or willingness to learn quickly
• Experience with SQL Server or SQLite
• Ability to deliver a clean, modular, and well-documented codebase

Nice to Have:
• Bilingual interface support (Arabic/English)
• Prior experience building ERP or tax-compliant invoicing systems
• QR code generation and Base64 encoding experience

Deliverables:
• Fully working Visual Studio project
• Database schema
• Sample e-invoice with ZATCA-compliant XML output
• Deployment guide or installer
• Complete source code

Timeline: 4–6 weeks
Budget: Negotiable based on expertise
Work Mode: Remote

To apply, please share:
• Your portfolio or relevant past work
• Your preferred approach (Desktop or Web-based)
• Estimated delivery time and cost

We are ready to start immediately with the right developer.