Custom API Development & Integration – Melbourne & Sydney




















API Integration Specialists in Australia
Our developers have experience with countless APIs, providing there is documentation, a clear desired outcome and access to API accounts – the sky is the limit when it comes to our API Integration capabilities.
3rd Party API Integration
If your company is looking to speed up manual processes or time consuming activities and your partner has an API access point then it is the perfect way to automate your business and potentially save hours per week.
Custom APIs we work with include:
- Stripe and PayPal API (and other payment gateways)
- Shopify and WooCommerce API (e-commerce)
- Google and Facebook Single Sign-on (SSO) Authentication APIs
- Zoom API (for Video-Conferencing, Virtual Event Portals)
- Any REST API
- Any Web-Based API
- ActionHRM API
- Bridge LMS API
- Hubspot API
Custom API Development for Businesses
Perhaps you don’t have an API for your own internal systems and are looking to create endpoints for your clients to interact with your systems.
In that case, building a custom API for your own business may be the right option. This will allow your operations to scale faster as well as reduce the need for manual input in every step of the process.
Custom API Development for Courier, Deliveries and Shipping
Modern E-commerce platforms are robust solutions for selling products online, however the fulfilment and logistics aspect can be challenging to integrate as there are different data formats and a large range of integration points.
The benefits of automation in this space are apparent when dealing with large order quantities and any optimisation which your business can achieve in this area will have compounding benefits as you scale.
Some of the platforms which we have integrated with include:
- Be Cool Couriers API (courier and dispatch automation)
- Australia Post and TNT APIs
- Sendle API
- Various Third-Party Logistics APIs (3PL) or Fulfilment Centre APIs.
Simplex Software has been integrating and building custom APIs since 2012 and is well equipped to help your business.
Our clients are based throughout Sydney, Melbourne, Brisbane, Perth and other metropolitan CBDs of Australia.
Ready for Rapidly Delivered Web Apps?
From strategy to launch, we’ll help you every step of the way. You’ll be working with a team that will help you bring your most ambitious ideas to life.
Why Simplex Software

Quality and Value
A cutting edge software & web development company, we are passionate about delivering innovative solutions that impress the world. The Simplex Software philosophy is simple. Provide exceptional software that provides a great value to our customers.

International Capabilities
As a global company, you can rely on Simplex to get your order out fast. Our international teams work hard to ensure that your orders are completed quickly and efficiently. We can help you no matter where you are located around the world.

Australian Market Experience
Simplex experience in delivering high-quality development & MVP services to a client base that includes some of Australia’s most recognisable brands gives us a distinct advantage when it comes to designing your systems and ensuring success from day one.

Worked with Startups, SMEs,
Government and Publicly Traded
Companies
We’re trusted by startups, small and medium sized businesses (SMEs), and government projects across Australia to deliver exceptional results. No matter how big or small, start-up or scale-up, we are here to help.