Upwork home
Sign up
Project Catalog
DesignDesign
Video & AudioVideo & Audio
Development & ITDevelopment & IT
MarketingMarketing
Writing & TranslationWriting & Translation
MoreMore

You will get Custom e-Invoice & Financial System Integration with C#

Cemal C.Status: Offline
Cemal C.
Preview image

Let a pro handle the details

Buy Web Application Programming services from Cemal, priced and ready to go.
Cemal C.Status: Offline
Cemal C.
Preview image

Let a pro handle the details

Buy Web Application Programming services from Cemal, priced and ready to go.

Project details

Are you looking for a robust, reliable backend solution for your financial workflows? With professional experience in C# and backend architecture, I specialize in building custom e-Invoice and e-Archive integrations, XML/UBL data processing, and secure API connections.

Whether you need a brand-new integration from scratch or need to fix and optimize existing financial pipelines, I deliver clean, modular, and maintainable code tailored to regulatory compliance. Let's discuss your project requirements and automate your financial systems today.
Programming Languages
JavaScript, Python, C#

What's included $199

These options are included with the project scope.

$199
  • Delivery Time 5 days
  • Number of Revisions 2
  • Number of Pages 1
Cemal C.Status: Offline

About Cemal

Cemal C.Status: Offline
Backend Software Engineer | C# & Python Expert | E-Invoice & Financial
Umraniye, Turkey - 6:23 pm local time
Hi, I am Cemal. I am a backend software engineer with over 5 years of specialized experience in C# development and e-Invoice (e-Fatura / e-Arşiv) integrations. I focus on building robust backend systems, automated financial data pipelines, and custom API integrations.

Whether you need to connect with financial integrators, process complex UBL/XML document structures, or automate repetitive background processes, I deliver clean, maintainable, and well-structured code.

Core Expertise:

E-Invoice & Financial Systems: 5+ years of hands-on experience with e-Invoice/e-Archive workflows, XML/UBL standards, and integrator APIs.

Backend & APIs: C#, .NET, Python, robust API architecture, and database management.

Automation & Data: Custom web scraping pipelines, financial data processing, and Telegram bot integrations.

I take pride in clear communication, clean code standards, and delivering projects on time. Let's discuss how I can help bring your project to life.

Steps for completing your project

After purchasing the project, send requirements so Cemal can start the project.

Delivery time starts when Cemal receives requirements from you.

Cemal works on your project following the steps below.

Revisions may occur after the delivery date.

Requirements & Architecture Review

We review your system requirements, API endpoints, and data structures (XML/UBL) to plan a clean integration flow.

Development & Integration

I develop the custom backend logic, handle API authentication, data transformation, and write clean, modular C# code.

Review the work, release payment, and leave feedback to Cemal.