Too much manual work
Staff copy information between systems, maintain spreadsheets or repeat tasks that could be automated.
DeltaCore / Custom software development
Custom software development for NZ businesses.
Build a new business application, improve existing software or connect the systems your team already relies on.
Direct, senior C#/.NET and full-stack engineering for projects of different sizes. From a focused fix to a substantial application, we start with the problem you need solved.
- NZ-based engineering
- New builds & existing systems
- Projects of different sizes
When standard software isn't enough
Your business should not have to work around its software.
Sometimes a small custom component is the missing piece. Other times, a dedicated application is the most sensible way forward.
Disconnected applications
Accounting, operations and customer data live in separate tools with no reliable way to exchange information.
Software that's hard to change
An older application needs new features, improved reliability or a staged modernisation rather than a complete replacement.
Specialist engineering
Build, extend and connect business software.
We can deliver a defined component or help shape a larger application, with attention to architecture, maintainability and the way software operates after launch.
C# / .NET backend engineering
Business logic, REST APIs, authentication, data access, application architecture and production services.
Web applications and portals
Modern application interfaces and internal tools using Next.js, React and TypeScript.
Databases and business workflows
SQL Server, PostgreSQL, validation, transactional processing and data-driven applications.
Systems integration and APIs
Connect existing applications, Xero, Microsoft 365 and other business platforms through custom integrations.
Automation and background processing
Hangfire, scheduled jobs, synchronisation, exception handling and repeatable workflows.
Modernisation and operational engineering
Improve existing .NET applications with testing, Docker-based delivery, logging and diagnostics in mind.
Commercial engineering experience
Engineering experience beyond a portfolio mock-up.
DeltaCore draws on prior professional experience with commercial .NET applications, business integrations and enterprise systems, alongside hands-on product development. We understand that working software needs to be supportable, not just impressive in a demonstration.
Professional client and enterprise work referenced here was completed during previous employment, not as DeltaCore client engagements. Our own products are shown below with their current release status.
How we work
Start at the right size
You don't need a completed specification or a large budget to start a useful engineering conversation.
- 01
Discuss the outcome
Tell us what isn't working, who uses the software and what you want to improve.
- 02
Define a sensible first stage
Choose a targeted fix, a discovery exercise, an integration or a staged build.
- 03
Deliver with visibility
Agree acceptance criteria, validate key workflows and document what is handed over.
Software we've actually built
See our engineering in practice.
These are DeltaCore's own software products. Message Easy Mode is publicly released; DeltaCore Commerce is a working prototype still under development. Both demonstrate real application engineering, with their status clearly distinguished.
Released · Open source · 0.2.0
Message Easy Mode
A publicly released control plane for deploying and operating self-hosted Matrix and Element communications infrastructure, with diagnostics, security, recovery and deployment workflows.
Released software with public source and installation materials.
Explore the released product
In development · Working prototype
DeltaCore Commerce
A modular .NET 8 and Next.js commerce prototype with a publicly accessible storefront demonstration, exploring checkout, Stripe payment integration, ordering and fulfilment workflows.
Demonstration only: not a production-ready commercial release or live retail store.
Explore the working prototypeCommon questions
A few things worth knowing.
Do you only take on large software projects?
No. A small internal tool, integration, technical problem or assessment can be a sensible starting point.
Can you work with software we already have?
Yes. We can improve, extend or integrate existing applications. Replacing a working system is not always the best option.
Can you work alongside our IT provider or developers?
Yes. DeltaCore can contribute specialist engineering to a defined project or collaborate with an existing technical team, with responsibilities agreed upfront.
Do we need a technical specification to make an enquiry?
No. Explain the business problem and what you would like to achieve. We can help identify an appropriate first step.
Start a conversation
Tell us what you need your software to do.
Whether it's a new application, an awkward existing system or one process that needs improving, tell us where you are and what you hope to achieve. No detailed specification required.
Prefer to contact us directly? See our contact details