Integration

Custom ERP & CRM Integration | We Connect the Systems Nobody Else Can

Your business runs on custom-built software. Or heavily customised off-the-shelf. It has no API. The vendor won't help. We build the integration layer and connect it to everything else.

Perth-based. Australia-wide. We specialise in systems others won't touch.

  • AU-wide Perth-based · servicing Australia
  • 18+ yrs Building custom software
  • Legacy Legacy system specialists
  • Fixed Price scopes, no surprises
Custom System Integration

Your System Wasn't Built to Connect. We Fix That.

Someone built the ERP. Or the CRM. Or the job management system, the asset tracker, the client portal. It was built for your business, or heavily customised to fit. And it works. The business depends on it.

But it doesn't talk to Xero. It doesn't sync with your CRM. Reports come out as CSV exports. There's no API. The vendor either can't or won't help with integration. And replacing the system would mean losing years of customisation.

HELLO PEOPLE is a Perth-based software consultancy. We specialise in connecting custom and legacy systems to modern platforms. We build the integration layer your system was never designed with, so your data flows where it needs to without replacing what works.

Custom Systems integration hub diagram connecting bespoke APIs, databases, microservices, webhooks, auth and reporting
Sound Familiar?

The reality of running on custom software

If your business depends on a system that nobody else can connect to, you probably recognise these.

No standard API to work with

Your system was built custom. Or it's an industry-specific ERP from a vendor who never prioritised integration. There's no API documentation, no webhook support, no Zapier connector. Just a database and maybe an export button.

The vendor won't help with integration

You asked the vendor about connecting to Xero or your CRM. They said "we don't support that" or quoted $200K for a custom connector. Or they simply stopped responding because the product is end-of-life.

Data re-entered across multiple systems

An order in the ERP gets re-typed into the accounting system. A customer update in the CRM doesn't reach the ERP. Staff maintain records in two or three places to keep everything in sync.

Heavily customised, can't be replaced easily

Your ERP or CRM has been customised over many years. Custom fields, custom workflows, custom reports. Moving to a standard platform would mean losing functionality your business depends on.

Built on old technology that's hard to extend

The system runs on .NET Framework, classic ASP, FoxPro, Progress 4GL, or some other technology that modern developers don't touch. Finding someone who can work on it is expensive and slow.

Locked into a vendor relationship

Only the vendor can make changes. They charge per hour. They control the timeline. You can't get your data out easily. And switching means starting from scratch.

15-Minute Integration Audit — No Cost, No Commitment

Tell us what systems you are running and what is not connecting properly. We map the gap, find what needs to be built, and give you a fixed-price quote before you commit to anything.

  • 15-minute scoping call
  • Fixed price included
  • Australian team
  • Ongoing support after launch
Book Your Free Audit
Get Started

Tell us about the system

What does it do? What's it built on? What systems does it need to talk to? Share the details and we'll assess it.

What We Build

Custom System Integration Solutions

API builds, cloud sync, middleware, data extraction and gradual modernisation. Here is what we deliver.

Custom API development for legacy systems

We reverse-engineer your system's database, understand the business rules and build a secure REST API on top. Authentication, rate limiting, field-level access control and documentation included.

Works even when the vendor provides no API. We work at the database level, respecting the application's data integrity rules.

For businesses whose custom system has no API and no integration options from the vendor.

Custom system to cloud platform sync

Your custom ERP or CRM syncing with Xero, MYOB, Salesforce, HubSpot, Shopify or any cloud platform. Bidirectional where needed — changes in either system flow to the other.

We handle the complexity: data mapping between different schemas, conflict resolution for bidirectional sync, and error handling for records that don't match.

For businesses that need their custom system data in cloud software their team uses daily.

Integration middleware and message bus

For complex environments with multiple systems that all need to share data. We build a central middleware layer that routes data between systems, transforms formats, handles errors and provides a single monitoring dashboard.

Event-driven architecture. Systems publish events. Subscribers receive what they need. New systems plug in without changing existing ones.

For businesses with three or more systems that need to share data reliably.

Data liberation from locked-in systems

Your data, out of the system, into a format you own. Regular exports to your data warehouse, reporting database or cloud storage. You're no longer dependent on the vendor for access to your own data.

Automated, scheduled, with full audit trails. Historical data extracted and ongoing changes captured incrementally.

For businesses where the vendor controls data access and you need independence.

Gradual system modernisation

Replace one module at a time. Keep the custom system running for what it does well. Build modern replacements for the parts that are holding you back. The integration layer bridges old and new.

Strangler fig pattern — modern modules gradually take over functionality from the legacy system. No big-bang migration risk.

For businesses whose system is too large and complex to replace in one go.

Ongoing legacy system support

Bug fixes, performance tuning, small enhancements and security patches for your custom system. We become the support team that the original developer isn't available to be.

We learn the system, document it, stabilise it and keep it running while you plan the long-term strategy.

For businesses whose system is critical but the original developer or vendor has moved on.

Custom API development for legacy ERP/CRM systems
Cloud synchronisation for custom business systems
Integration middleware connecting multiple business systems
Data extraction pipeline from vendor-locked system
Gradual modernisation replacing legacy system modules
Technical support team maintaining legacy systems
Why Integrate

Your custom system talks to everything else

We build the integration layer your system was never designed with. Your ERP talks to Xero. Your CRM syncs with HubSpot. Your internal system pushes data to Shopify. Whatever the combination, we make it work.

The custom system stays as it is. The integration handles the data flow.

Custom system connected to cloud platforms via integration layer

A proper API on your legacy system

We build a REST API that sits on top of your custom database. Documented, authenticated, rate-limited. Any modern system can now connect to your ERP/CRM without touching the database directly.

Your vendor may not provide an API. We build one anyway, by understanding the data model and business rules.

API layer architecture for legacy system integration

Keep using the system that works

Replacing a custom ERP or CRM is a massive project. Often unnecessary. If the system does what it does well, just connect it to the modern tools your team needs.

Integration is faster, cheaper and lower risk than rip-and-replace. You can always migrate later with the integration layer already in place.

Team continuing to use existing system while new integrations run

Your data accessible outside the system

Reports in Power BI. Data in a warehouse. Records available to other departments. The integration breaks the data out of the locked-in system and makes it available where it's needed.

No more depending on the vendor to provide reports or exports.

Business data freed from legacy system into reporting dashboards

A path to modern when you're ready

The integration layer maps every data entity, relationship and business rule. When (if) you decide to replace the system, the hard work of understanding the data model is already done.

Migrate in stages. Replace modules one at a time. The integration layer becomes the bridge between old and new.

Staged migration path from legacy to modern systems
Pricing

How we price custom integrations

Every custom system is different. We scope after discovery, never before.

Free discovery call

Tell us about the system: what it does, what it's built on, what needs to connect. We'll assess complexity and give you a realistic range.

Fixed-price quote

After reviewing the system architecture and data model, we quote a fixed price for the integration or API build. No hourly creep.

Ongoing support

Monthly plans for integration monitoring, legacy system maintenance and evolution. Your systems looked after properly.

Legacy Access database migration to multi-user cloud web application with mobile access
Case Study

Legacy Access database replaced with a multi-user cloud web app

A wholesaler running its operations on a fragile Microsoft Access database — single-user lockouts, occasional corruption, no remote access — was migrated to a modern web app on a proper database. All historical data preserved, forms and reports reproduced, and the workflow extended to mobile crews.

Read the full case study
20yr Of historical data migrated cleanly
0 Days of operational downtime
12wk From discovery to cutover
4x More concurrent users supported
How It Connects

Your custom system integration at a glance

Your custom or legacy system at the centre. API layer, middleware and sync connecting it to the modern platforms your business needs.

How It Works

From discovery to connected and monitored

Every custom system is different. The process adapts, but the structure stays the same.

System Discovery

We review the system architecture, database schema, business rules, integrations (if any) and technology stack. We document what exists, often for the first time.

Data Mapping

Mapping entities in your custom system to entities in the target platforms. Customer = Contact. Order = Invoice. Product = Item. Translation rules documented and validated.

Architecture

Designing the integration approach: direct API, middleware, event-driven, database-level or file-based. Matched to the system's capabilities and your reliability requirements.

Build

Integration layer built with proper error handling, retry logic, monitoring and logging. API endpoints documented. Sync rules implemented and tested against real data.

Testing & Validation

End-to-end testing with real data. Every entity, every edge case, every error scenario. Data integrity validated between systems. Performance under realistic load confirmed.

Go-Live & Monitoring

Live with full monitoring. Sync dashboards, error alerting and performance tracking. Parallel running where needed. Your team trained on the new workflow.

Why us

Why HELLO PEOPLE for integrations

  • We build, not just connect

    We write proper integration code: API connections, data mapping, error handling, logging. Not Zapier chains that break quietly.

  • Fixed-price quoting

    You get a clear price before we start. No hourly billing that spirals. No surprise invoices at the end of the month.

  • Built for Australian business

    We understand BAS, GST, super, award rates, Australian privacy law, and the platforms local businesses actually use.

  • Senior team, direct access

    You talk to the people building your integration. No account managers, no offshore handoffs, no ticket queues.

  • Ongoing support included

    APIs change. Platforms update. We monitor, maintain, and evolve your integration so it keeps working as your business grows.

We had a custom ERP built fifteen years ago. No API, no documentation, the original developer retired. HELLO PEOPLE reverse-engineered the database, built an API, and connected it to Xero and our new CRM. We didn't have to replace the ERP. It just works with everything now.

General Manager Manufacturing company, Perth
Industries

Custom systems we've connected

Every industry has its own custom and legacy systems. The business logic inside them is irreplaceable. The integration just connects them to the rest of the world.

Manufacturing with custom ERP integration

Manufacturing

Custom ERP for production scheduling, BOM management and quality tracking. We connect it to accounting, warehouse management and eCommerce without replacing the system your factory depends on.

Logistics company with custom dispatch system integration

Logistics & Transport

Custom dispatch, routing and fleet management systems. We connect them to customer portals, accounting and real-time tracking platforms.

Mining operations with custom system integration

Mining & Resources

Asset management, maintenance scheduling and compliance systems built for specific operations. We integrate with SAP, financial reporting and safety compliance platforms.

Healthcare facility with custom system connected to modern platforms

Healthcare & Aged Care

Custom patient management, rostering and billing systems. We connect them to Medicare, accounting, HR platforms and government reporting systems.

Government department with legacy system modernisation

Government & Utilities

Legacy systems for asset management, citizen services, billing and compliance. We connect them to modern portals, payment gateways and reporting platforms.

Professional services firm with custom system integration

Professional Services

Custom practice management, time tracking and client billing systems. We connect them to accounting, document management and CRM platforms.

FAQs

Common questions about custom system integration

Our system has no API. Can you still integrate it?

Yes. We work at the database level, reading and writing data directly using the system's data model and business rules. Or we use file-based integration (the system exports, we pick it up). Where possible, we build an API on top so future integrations are easier.

We don't have the source code. Is that a problem?

Not necessarily. We can work with the database directly and build integration at that level. If we need to modify the application logic, it gets harder without source code, but database-level and file-level integration usually covers what's needed.

How much does custom system integration cost?

Pricing depends on the systems involved, the volume of data and the exception cases. We provide a fixed-price quote after a 15-minute scoping call — no hourly billing, no surprises.

Can you also support and maintain our legacy system?

Yes. If the original developer or vendor is gone, we take over support. Bug fixes, performance tuning, security patches and small enhancements. We learn the system, document it and keep it stable.

Should we just replace the system instead?

Sometimes, yes. But often the system does 80% of what you need and replacing it is a massive project with significant risk. Integration lets you keep the 80% and fill the gaps with modern tools. We'll give you an honest assessment of which path makes more sense.

What if our system is on very old technology?

We've worked with .NET Framework, classic ASP, FoxPro, Progress 4GL, Delphi, VB6 and systems built on technologies most developers haven't heard of. The database is usually more accessible than the application, and that's where integration happens.

Will the integration break if the vendor updates the system?

We design integration to be resilient. Database-level integrations monitor for schema changes. API-level integrations use versioning. We include alerting so you know immediately if something changes. Most vendor updates don't break the integration.

How long does a custom system integration take?

A single-system sync takes 6 to 10 weeks. API layer builds take 8 to 14 weeks. Full middleware environments take 12 to 20 weeks. We scope precisely after the discovery phase. Custom systems vary widely in complexity.

Get Started

Tell us about the system

What it does, what it's built on, and what needs to connect. We'll tell you what's possible and what it costs.

Tell Us About Your System

What does it do? What's it built on? What cloud tools does it need to connect to? Share the details and we'll assess the integration options.

Prefer a quick chat? Call 0425 531 127. We answer the phone in Perth.