Cactus Software builds reliable API integrations, automation tools, and custom software that connect your accounting, eCommerce, payments, and logistics platforms — so your team stops doing things manually.
Cactus Software is an independent software studio founded by Phuong Do, based in Australia. Since 2013, Phuong has completed 260+ projects on Upwork — working with businesses across Australia and globally to integrate, automate, and streamline their software systems.
With 15+ years of hands-on development experience spanning Microsoft .NET, cloud infrastructure, accounting platforms, eCommerce, payments, shipping, and mobile — there's very little in the integration world we haven't seen.
When you work with Cactus Software, you work directly with Phuong. No offshore team, no account manager middlemen — just deep expertise and honest communication.
Founder & Lead Developer, Cactus Software Pty Ltd
Over 15 years across accounting, eCommerce, cloud, payments, shipping, mobile, and more.
Every project is scoped and delivered by Phuong directly — no outsourcing, no surprises.
Connect platforms like Xero, Reckon, QuickBooks, MYOB, and Salesforce with Shopify, WooCommerce, and BigCommerce through real-time, battle-tested API integrations.
Enquire →Automate repetitive processes using Azure Functions, webhooks, RPA tools (UIPath, Zapier), and custom middleware that runs reliably in the background — every day.
Automate your workflow →Integrate Stripe, PayPal, eWay, Braintree, and other gateways into your existing systems — with proper reconciliation, error handling, and audit trails.
Discuss your project →Bespoke applications in C# / ASP.NET / .NET Core, Angular, or Blazor — built around your exact requirements, not a template. Well-documented and easy to hand over.
Get a quote →Architecture, deployment, and automation on Azure or AWS — Docker, Kubernetes, CI/CD pipelines, and serverless functions that scale with your business.
Plan your cloud setup →Cross-platform mobile apps using Xamarin, or native builds on Xcode (iOS) and Android Studio. Integrated with your existing backend APIs and business logic.
Build your app →Real products used by real businesses — built and maintained by Cactus Software.
A free web tool that connects securely to Reckon Accounts Hosted, allowing users to extract and export accounting data for reporting, analysis, or integration — no installation required.
Try beanwiz free →A multi-platform integration hub connecting Reckon, QuickBooks Online, and Xero with Shopify, WooCommerce, and BigCommerce. Automates data sync, supports manual imports, and simplifies multi-system workflows.
Visit autosync →A collection of Azure-based functions that automate file processing, data transformation, and API integrations between cloud applications — built for businesses with complex multi-system workflows.
Ask about this →Custom integrations built for clients connecting Sage 50, NetSuite, MYOB, and FreshBooks with various line-of-business systems — including inventory, CRM, and document management platforms.
Similar project? Talk to us →End-to-end integrations with Airbnb, Booking.com, and Agoda — syncing availability, pricing, reservations, and guest data with property management systems in real time.
Tell us your setup →Document management and legal software integration using iManage and GlobalX Document System — streamlining workflows for legal firms requiring automated document handling and system sync.
Enquire about legal tech →Got a system you need to integrate? A manual process you'd love to automate? Or just not sure what's possible? Send a message — Phuong will typically respond within one business day.