Lean, robust, custom solutions, built for purpose.

We help you to refine your need, clarify the solution, and build products to evolve with your business.




Great to work with

Friendly and professional, we aim to build long term working relationships with our clients as trusted their partners.

Expertise & Experience

Dedicated to perfection, our experienced development team puts technical expertise at your fingertips. 


Building products is a process, and one we’ve honed over time. From inception to completion and beyond, we bring rigour and quality at every phase.

We understand that businesses have great ideas, but may lack the expertise to implement in-house. We partner with you to create the software or app you need, from concept to launch. Perhaps you:

  • Have an idea for a new app
  • Need to streamline or automate processes
  • Reach a new audience or market
  • Deliver a new service or improve
  • Need to revamp legacy software

Whether you’re looking to develop a B2B or B2C application, web app, internal tool, or automation processes; our team can help you develop the software solution that your business needs. We help businesses transform, innovate and surpass the expectations of their customers, industry and market.

We like to start small, with exercises that help us build trust, test ideas, scope projects, analyse code and generally get to know you and your business. Our team will also be available to guide you through the software development process so you won’t feel lost along the way.

Web applications / custom development

eLearning / LMS platforms

API gateways

Database development


Code assessments / refactoring

Client / customer portals

Mobile apps

“The team at Mainstay have been a massive support to the Live for Lily Foundation, in the design and roll out of our new website, the implementation of an improved email server, and general all round assistance of all our information technology needs. They’re responsive to our requests and service is second to none in ensuring our requirements are met and the performance of our site is optimal and secure.”

Philip Martins - Director and Chief Financial Officer, Live for Lily Foundation


Big or small, we strive to build awesome relationships with our clients. Here’s a handful that we’ve had the privilege of working with.

Mainstay Digital focusses on open source development and open source technologies. This means we can leverage shared knowledge and participate in global communities of like minded developers, and stay on the leading edge of development practices.

We work in relevant, complementary languages, frameworks and technology to bring cohesive solutions to the products we build. And it means we have the right tools for the job – whether working with a CMS such as WordPress or Craft, or implementing custom-built web applications. Get in touch via the form below to find out more.


We offer 12 month warranty on projects, as well as a money back guarantee period to prove our ability, give you peace of mind, and zero risk.

MVP – build what you truly need first

A Minimum Viable Product (MVP) gives you  the opportunity to prove your concept, test your theory, and trial your product in the real world. We’ll help you define the features of your MVP, strip out the “nice to haves”, create a scope which gets you to the next milestone and work to your  base budget. From there, you’ll be ready to evolve and grow based on market learnings.

The right technology

Time and again we encounter legacy websites and systems which were badly, inefficiently, or lazily implemented. Spaghetti-code situations with cross dependencies which make upgrades next to impossible.

Our development takes a best-practice approach, with a focus on clean, logical, documented code. Our tight-knit local team ensures continual quality, with tried and tested open-source tech stacks

We love lean, intuitive, intelligent systems! This means for future, upgrades and scalability is enhanced, whilst risk and cost is reduced.

Agile / Scrum, or Waterfall hybrid

We advocate for an Agile approach to product development wherever possible. This does not mean working to an unlimited budget – it means understanding and executing a mindset ready to pivot and adapt based on shifting priorities, market and technical landscape, within your resource boundaries. Often, a combination of critical-path and Agile is called for, melding the known pathways with flexibility for change.




Through foster and kinship care, Ozchild  delivers a range of critical services to children, young people and families who are experiencing significant challenges, to strengthen, heal and prevent abuse  and neglect. 

We work with Ozchild to evolve their website, drive enquiries, improve engagement and conversions. Recently, along with ongoing support and maintenance, we’ve implemented a suite of new digital initiatives such as Carer landing pages, donation modules, and CRM integrations.


Big or small, we strive to build awesome relationships with our clients. Here’s a handful that we’ve had the privilege of working with.


We design and build digital products of all shapes and sizes. Website and application development often requires a flexible approach to the process.

Some phases may be linear, some may run concurrently, or the project may call for an Agile approach.

Each project is unique, and so are our relationships.

Depending on your organisational or project needs, projects may be managed in a variety of forms – fixed price/scope, agile/sprint based, dedicated resources, or time and materials.

We work with our clients and strategic partners to create beautiful user experiences; robust, functional and practical products, and achieve positive, meaningful outcomes.

Contact us via the form below to find out more about working with Mainstay.


1. Get in touch

Arrange your free 20 minute discovery session at a time that best suits you.

2. Tell us about you

Explore business and project requirements, goals and what you're looking to achieve.

3. FREE audit

We review your existing site or application at a code level and provide a comprehensive report.

4. Plan and GO

With a roadmap in place, work with our team to evolve, advance and grow your business.


We’ll happily arrange a time for a call or meet, provide you with a scope of work and estimate, or give you some expert advice.


Website Development

Future proof, robust, cleanly coded, upgradable websites built to evolve with your business. 

Australian WordPress Support

Let us help with fixes, updates, new features, performance, security, migrations and much more.


Web apps & Custom development

Product development and MVPs. Lean, built-for-purpose applications.

Website Maintenance

Website support, ongoing maintenance,
performance optimisation and security.

Website Hosting

Hosting packages tailored to your needs. Email migration & account setup.

Website Accessibility

Accessibility audits & implementation. Adhere to WCAG standards for your audiences.

Discovery and Requirements

Define objectives, explore requirements, engage stakeholders and develop your specification.


Flexible, scalable websites for business.


Enterprise CMS, custom development,
unrivalled eCommerce.

React & React Native

High performance, built-for-purpose web apps and mobile apps.

Python Development

Custom scripting for automating processes, augmenting applications and data integration.


Beautiful code, immaculate architecture, rapid development.