Australia's Leading Custom Software, Apps, Integration & Database Developer

Building Powerful Web Services for Your Business

Experienced Software Developers For Custom Web Services

Let's Work Together

Achieve Seamless System Integration for Your Australian Business

As a business leader, you need to integrate systems to optimize operations. But traditional SOAP services can be complex. Let our 15+ years of REST, SOAP and JSON development seamlessly connect your systems using the latest protocols and APIs. Stop duct-taping connections. 

We have delivered integration solutions using the latest protocols and APIs:

  • Custom RESTful APIs
  • SOAP web services
  • Third-party integrations
  • Legacy system upgrades
  • Documentation and testing
  • Ongoing management

Partner with us to robustly integrate your tech stack and data, optimizing your business performance.

Seamless System Integration

We enable Australian businesses to seamlessly connect systems using proven, lightweight and universal data formats. Don't settle for siloed systems - integrate with ease using our expertise in REST, SOAP and JSON development and integrations.

Accelerate App Development

Our expertise in REST, SOAP and JSON web services means your developers can easily integrate and consume standard interfaces, accelerating application development. Avoid complex custom code and speed time-to-market by leveraging our 15+ years developing integrated solutions using proven web service frameworks. Rapidly develop and launch apps with ease

Enhance User Experience

Leverage our expertise in REST, SOAP and JSON services to allow your client-side applications to seamlessly request and integrate remote data. This creates richer, more responsive user experiences by dynamically pulling in relevant information on-demand. Don't settle for static experiences - have your apps intelligently integrate data for your users.

Scalable Systems

Our expertise in REST, SOAP and JSON enables highly scalable distributed systems for your business. Multiple applications can leverage the same centralised interfaces and logic across platforms. Avoid duplicating logic as you scale and let us handle it with years building scalable, distributed systems using proven web service frameworks.

Increase Reuse

Let us expose your business data and logic as standardized REST, SOAP and JSON services. This enables seamless reuse across multiple applications and channels, avoiding duplicate efforts. With 15+ years experience, we can maximise reuse of your systems using proven web service frameworks. Stop duplicating work - integrate and reuse easily with our expertise.

Achieve Interoperability

Utilise our expertise in open standard REST, SOAP and JSON services to achieve seamless interoperability between diverse systems and technologies. We leverage platform-agnostic web services based on proven standards for maximum compatibility across your heterogeneous landscape.


What Our Clients Say

Hear from business owners and executives who have trusted us to build their custom software solutions.

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“We have been working with C9 for close to 3 years. During this time C9 have helped us develop and maintain our website to our needs in a professional manner. They assisted with our online application process resulting in a streamlined process for our online customers. C9 has produced a cost effective solution to meeting our online sales and exposure.”

Phil McMaster, Director - Car Loan Xpress
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"C9 is a very capable web design and technology company with a vibrant and enthusiastic team. In my experience C9 provide innovative & creative solutions, a high level of customer service and excellent communication. I find C9 to be very reliable and accessible. The team at C9 has a strong awareness of an individual’s needs, how to optimise growth potential and the evolving needs of a strong web presence. I highly recommend C9."

CARLTON COX, Owner - &
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"C9 updated and upgraded our rusty old site to a more user friendly format. Our site is unique with international clients and visitors, capturing book sales orders from around the world, proprietary site newsletter capabilities, and a large volume of past articles and newsletters. Ongoing support has been very good. Marcus Eddy is thorough and professional, and a pleasure to work with."

DAVID TANZER, International Lawyer Owner & Director - David A Tanzer & Associates, PC

Trusted by Some of the

Australia's Leading Businesses.

See who we've helped build successful custom software solutions for.

Price Waterhouse Cooper
Rud Group
Australis Asset Advisory Group
Delta Panels
Inner Range
Brisbane Markets Limited
Avocados Australia
Sulzer Group
Commercial Radios Australia
CSIRO Data 61
Compare the Market
University of Queensland
Professional Hospitality
ISG Funds
Bonney Group
Specialist Electrical Solutions
Projects & Case Studies Monitor

We Believe Our Work Speaks for Itself. 

See how we've helped businesses of all sizes achieve their goals with custom software solutions.

Our Work

Build Modern and Efficient APIs with REST, SOAP, and JSON

Our team of experienced API developers can help you create high-performance, scalable, and secure APIs that meet your business needs and integrate seamlessly with your existing systems.

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The C9 Advantage

C9 is dedicated to delivering high-return projects, and we take pride in our client’s long-term loyalty. This is a testament to our quality, professionalism, and the exceptional experience you can expect when working with us.

  • Customised approach
  • Expert Team
  • End-to-end Services
  • Focus on User Experience
  • Ongoing support and maintenance
  • Proven Results 
  • Exceptional Experience
  • Customer-First Mindset

Start Your Project

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Frequently Asked Questions About REST, SOAP, and JSON

REST (Representational State Transfer) is a software architectural style for distributed systems that is based on the principle of stateless resource manipulation. REST APIs use HTTP verbs (GET, POST, PUT, DELETE) to perform operations on resources (e.g., users, products, orders).

SOAP (Simple Object Access Protocol) is a messaging protocol for exchanging XML-encoded data between applications over a network. SOAP APIs typically use HTTP as the transport protocol, but can also use other protocols such as SMTP or JMS.

JSON (JavaScript Object Notation) is a lightweight data-interchange format that is easy for humans to read and write. JSON is often used to represent data in REST APIs.



  • Secure and reliable
  • Well-defined standards
  • Good for complex data exchange


The best choice for your project will depend on a number of factors, including the specific requirements of your application, the skills and experience of your development team, and the preferences of your target audience.

REST is a good choice for most projects, as it is simple, flexible, and widely supported. SOAP is a good choice for projects that require secure and reliable data exchange, or that need to comply with industry standards. JSON is a good choice for projects that need to exchange data efficiently, or that target a wide range of platforms.

Enhance Your Business Processes with REST, SOAP, and JSON APIs

Our team of experienced API developers can help you automate your business processes and streamline your workflows with powerful and efficient APIs.