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I will build custom invoicing integrations for quickbooks, odoo, xero, erpnext
Adex Tech
About this gig
WELCOME TO MY GIG
Need a reliable developer to build or customize your invoicing solution? You're in the right place.
I specialize in developing secure, scalable, and custom invoicing integrations for QuickBooks, Odoo, Xero, and ERPNext, helping businesses automate billing, generate professional invoices, synchronize financial data, and streamline accounting workflows.
My services include:
QuickBooks API Integration
Odoo Invoice Customization
Xero API Development
ERPNext Invoice Module Development
Invoice Creation & PDF Generation
Invoice Template Customization
Invoice Automation & Recurring Billing
Webhooks & REST API Integration
Customer, Product & Payment Synchronization
Tax, VAT & Multi-Currency Support
Error Fixing & Performance Optimization
Third-Party Software Integration
Why choose me?
Clean, secure, and maintainable code
Business-focused solutions
Fast communication and on-time delivery
Ongoing support after project completion
Whether you need a brand-new integration, custom invoice templates, API development, webhook implementation, or fixes for an existing invoicing system, I can deliver a solution tailored to your business.
Get to know Adex Tech
Adex Tech
Backend Developer, APIs and Databases
- FromItaly
- Member sinceJul 2026
- Avg. response time13 hours
Languages
English, Italian, Spanish, French, German
I'm a Backend Developer specializing in APIs, databases, and scalable server-side solutions. I build secure, high-performance backend systems, develop RESTful APIs, integrate third-party services, optimize databases, and troubleshoot complex issues. Whether you need a custom backend, API integration, authentication, database design, or performance optimization, I deliver clean, maintainable code with a focus on reliability, security, and timely communication. Let's build a robust solution that powers your business.
FAQ
Which invoicing platforms do you support?
I work with QuickBooks, Odoo, Xero, ERPNext, and other invoicing or accounting platforms through APIs, custom modules, automation, and third-party integrations.
Can you customize my existing invoicing system?
Yes. I can customize invoice templates, add new features, fix bugs, automate workflows, integrate payment gateways, and connect your invoicing platform with your website, CRM, ERP, or other business applications.
What do you need before starting my project?
Please provide your project requirements, platform details, API documentation (if available), access credentials or sandbox environment, and a brief explanation of the invoicing workflow you want to build or customize.
