API Development Australia

API Development Services

Your business runs on multiple systems. We make them work together.

You have a CRM, accounting software, maybe an eCommerce store, a job management tool, and a handful of internal spreadsheets. Right now, your team is the glue, copying data between systems, running manual exports, chasing discrepancies. That is the problem API development solves.

As an API development company, we do two things. First, we build custom APIs, the backends that power your web apps, mobile apps, and customer portals. Second, we connect your existing platforms (Xero, MYOB, Shopify, Salesforce, simPRO, HubSpot) so data moves between them automatically. No double-handling. No spreadsheet gymnastics.

We are API specialists working with businesses across Australia. Custom API development, system integration, webhook processing, and data feeds. If your systems need to talk to each other, that is what we do.

Business professionals mapping out their system integration needs

What We Build

API development, by project type

REST APIs, system integrations, webhooks, data feeds, and legacy API modernisation. These are the project types that make up our API development work.

RESTful API Design & Development

Custom REST APIs built in Laravel, Node.js, .NET, or Python. Clean resource-based endpoint design, proper HTTP methods, consistent error responses, pagination, filtering, and sorting. APIs that mobile apps, React frontends, third-party platforms, and internal tools consume.

We follow REST conventions properly, not the "everything is a POST to /api/data" approach. Resources, sub-resources, query parameters, proper status codes, and HATEOAS links where they add value.

Authentication with JWT tokens, API keys, or OAuth 2.0 depending on the consumer. Rate limiting to prevent abuse. Input validation to prevent injection. CORS configuration for browser-based consumers. OpenAPI/Swagger documentation so developers can integrate without guessing.

Third-Party System Integration

Connecting your business systems. CRM to accounting. E-commerce to inventory. HR to payroll. Website to ERP. We build the middleware and integration layers that make separate systems work together.

Xero, MYOB, Salesforce, HubSpot, Shopify, WooCommerce, Square, Stripe, Australia Post, StarTrack, MailChimp, Klaviyo. We have integrated with most of the platforms Australian businesses use. Each integration is built to handle API changes, rate limits, and error recovery.

Real-time sync via webhooks where available. Scheduled batch sync for systems without webhook support. Queue-based processing for high-volume integrations. Error logging and retry logic for every integration.

Webhook Development

Building webhooks: both incoming (receiving events from external systems) and outgoing (sending events from your platform to subscribers). Event-driven architecture that eliminates polling and reduces latency.

Incoming webhooks from Stripe, Shopify, Xero, PayPal, Twilio, and other platforms. Signature verification, idempotency handling, event processing, and retry-safe endpoints. Webhook failures are logged, alerted, and retried.

Outgoing webhooks for your own platform, notifying subscribers when orders ship, payments complete, records change, or thresholds are exceeded. Configurable endpoints, retry policies, and event filtering per subscriber.

Data Feeds & Reporting APIs

APIs that expose business data to Power BI, Tableau, internal dashboards, or partner systems. Data aggregation, transformation, and delivery via scheduled exports or on-demand API endpoints.

JSON APIs for real-time data access. CSV/Excel export endpoints for reporting tools. Scheduled data delivery to FTP, S3, or email. Data warehouse feeds for analytics platforms.

Proper pagination for large datasets. Field selection for mobile consumers. Caching for frequently-accessed data. Rate limiting for fair usage. Authentication scoped to specific data subsets.

Legacy API Modernisation

Old APIs that need updating: SOAP to REST, XML to JSON, monolith to microservice. We modernise legacy integration layers without breaking the systems that depend on them.

Versioned migration approach. New API built alongside the old one. Consumers migrate at their own pace. Old endpoint deprecated with a timeline. No big-bang switchover.

Common scenario: a business has a fragile integration layer, such as direct database connections, CSV file drops, or screen scraping, that needs replacing with proper API-based integrations. We build the API and migrate each connection individually.

Business professionals discussing API development requirements

System integration architecture connecting CRM, accounting, and e-commerce platforms via APIs

Team discussing webhook integration strategy in a meeting

Business professionals reviewing data integration results together

Legacy API modernisation from SOAP/XML to REST/JSON with versioned migration

Xero integration and automation system — Case Study

Case Study

Xero integration that cut invoice turnaround from 2 days to 2 hours

We integrated Xero with a mobile workforce platform: automated invoicing, job costing and time tracking. Data entry dropped by 90%.

Read the full case study

90% Less data entry

2 days → 2 hrs Invoice turnaround

100% Job cost visibility

Why APIs

Why API integration matters for your business

Automation Flexibility Real-Time Scalability

Office worker freed from repetitive data entry tasks

Eliminate manual data entry and reduce errors

The primary business case for API development: stop entering the same data into multiple systems. An order placed on your website flows automatically to your accounting software, inventory system, and shipping provider. No copy-pasting. No double handling. No human errors.

This is what most Australian businesses are actually looking for when they say "integration." They have a team member spending hours each day copying data between systems. An API integration handles it in seconds, 24/7, without mistakes.

The ROI calculation is straightforward. If a staff member spends two hours per day on data entry that an integration can eliminate, that is $25,000+ per year in labour costs, plus the error correction costs that go with manual processes.

Business team choosing between platforms knowing they can all connect

Connect any system to any other system

APIs are the universal connection point. Your custom application can talk to Xero, your CRM, your shipping provider, and your email platform, all through APIs. When you change one system, only its API integration changes. Everything else stays connected.

This decoupling is the real value. Without APIs, changing your accounting software means updating every system that touches financial data. With APIs, you update one integration point. The rest of the business keeps running.

Build your technology stack from best-of-breed tools connected by APIs, instead of locking into a single vendor's ecosystem. Pick the best CRM, the best accounting package, the best e-commerce platform, and connect them through clean integrations.

Team working with live data flowing between systems in real time

Data flows in real time, not overnight batches

Webhook-driven integrations process events as they happen. Customer places an order, and the warehouse knows immediately. Payment is received, and the accounting system records it instantly. Stock level changes, and the website updates within seconds.

Compare this to overnight batch processes or manual end-of-day reconciliation. Real-time data means real-time decisions. Your dashboard shows current numbers, not yesterday's numbers.

Real-time does not mean every integration needs sub-second latency. For most business workflows, "within a few minutes" is real-time enough. We design the sync frequency to match the business requirement, not the technical maximum.

Growing team confident their systems scale with the business

Handle growing data volumes without redesigning the architecture

A well-designed API handles ten requests per minute and ten thousand per minute with the same architecture. Queue-based processing, horizontal scaling, and caching mean the integration layer grows with the business.

This matters when your e-commerce store scales from fifty orders per day to five hundred. The API integration was designed for the larger number. It does not break when success arrives.

When a system we integrate with has rate limits (most do), our API middleware handles backpressure: queuing requests, respecting rate limits, and retrying failures. The business sees seamless integration regardless of the technical constraints.

Support & Maintenance

Broken integration? API update needed?

API integrations need ongoing maintenance. Platform providers change their APIs. Authentication tokens expire. Data formats evolve. We fix, update, and monitor.

Broken Integration Repair

Integration stopped working? API changed? We diagnose and fix broken integrations: Xero, Shopify, Stripe, Salesforce, or custom APIs. Same-day response.

API Version Migration

Xero moved to OAuth 2.0. Shopify deprecated REST for GraphQL. MYOB updated their API. We migrate your integrations to current API versions before the old ones are turned off.

API Security Review

Authentication, authorisation, rate limiting, input validation, and encryption audit. We check your APIs against OWASP API Security Top 10 and fix vulnerabilities.

Performance Optimisation

Slow API responses? We profile endpoints, optimise database queries, add caching, implement pagination, and tune the hosting. Sub-200ms response targets.

API Documentation

OpenAPI/Swagger specification, interactive documentation portal, code examples, and integration guides. Documentation that developers can actually use.

Ongoing Integration Monitoring

Proactive monitoring of your API integrations. Failed sync alerts, error rate tracking, and automated retry management. Monthly reports on integration health.

API Development Company

Tell us what systems you need connected

From building a custom API from scratch to connecting platforms or fixing a broken integration, describe your project and we will come back with a clear plan and a fixed-price quote.

Who It's For

Common API development scenarios

E-commerce integration, mobile app backend, accounting sync, or multi-system middleware. If one of these matches your situation, we have done it.

01

E-commerce Integration

Shopify or WooCommerce connected to Xero, MYOB, inventory management, shipping providers, and marketing platforms. Orders, payments, stock, and customer data sync automatically.

02

Accounting Integration

Xero or MYOB connected to your custom application. Invoices, payments, contacts, and chart of accounts synced automatically. Eliminate manual accounting data entry.

03

Mobile App Backend

REST API backend for your iOS or Android application. Authentication, data sync, push notifications, file uploads, and real-time updates.

04

Multi-System Middleware

Central API layer connecting CRM, accounting, project management, and operational tools. One integration hub instead of point-to-point connections between every system.

05

Partner / Client API

API that your partners, clients, or resellers consume. Authenticated endpoints, usage tracking, rate limiting, and developer documentation portal.

06

Legacy System Integration

Old system with no API? We wrap it: database access layer, file-based integration, or screen scraping as a last resort. Modern API on top of legacy infrastructure.

Integration Upgrades

Common API modernisation and integration upgrade paths

Manual processes to automation, batch imports to real-time sync, legacy SOAP to modern REST. These are the upgrade paths we execute.

Manual Data Entry → Automated Integration

Staff copying data between systems manually. We identify the data flows, build API integrations, and eliminate the manual work. Often the highest-ROI project a business can undertake.

CSV / FTP Imports → Real-Time APIs

Replace nightly CSV file drops and FTP transfers with real-time API integrations. Data flows immediately instead of waiting for the overnight batch. Errors caught in real time instead of discovered the next morning.

SOAP / XML → REST / JSON

Modernise legacy SOAP web services to REST APIs with JSON payloads. Simpler consumption, better tooling, wider developer familiarity, and lower bandwidth.

Point-to-Point → Hub Architecture

Replace spaghetti point-to-point integrations with a central API hub. Adding a new system means one integration to the hub, not individual connections to every other system.

Zapier / Make → Custom Integration

Outgrowing no-code integration tools? Rate limits, data transformation complexity, and monthly costs add up. We replace Zapier/Make workflows with custom API integrations that handle the volume and complexity properly.

Deprecated API → Current Version

Platform provider deprecated their API version and your integration needs updating. We migrate to the current version: OAuth 2.0 authentication, new endpoints, changed data formats.

Technical Fit

Technologies behind the APIs we build

The frameworks, platforms, and infrastructure that power our API development work.

Laravel APIs

Our primary backend for REST APIs. Laravel's API Resources, form requests, and Sanctum authentication make it fast to build properly structured APIs.

Node.js APIs

Express or Fastify for high-throughput APIs, real-time endpoints via WebSockets, and Lambda-based serverless APIs. When async I/O and speed matter.

.NET APIs

ASP.NET Core Web API for enterprise endpoints. Azure AD authentication, gRPC for microservices, and Swagger documentation. The choice for Microsoft-stack businesses.

APIs on AWS

API Gateway + Lambda for serverless APIs. EC2/ECS for traditional hosting. CloudFront for edge caching. The infrastructure behind the API.

Database Design for APIs

The API is only as good as its data layer. Database schema design, indexing, query optimisation, and migration for the systems behind your endpoints.

React / Mobile Consumers

React SPAs and React Native mobile apps consuming your API. The frontend that presents the data your API delivers.

We had a staff member spending three hours every day copying order data from our Shopify store into MYOB. HELLO PEOPLE built an integration that syncs orders, customers, and payments automatically. That staff member now spends their time on customer service instead of data entry. The integration paid for itself in under two months.

E-commerce Manager Retail brand, Perth

Related Services

Related technology and service pages

FAQs

Common questions about API development

How do you scope and price an API project?

We start with a free scoping call to map the systems involved, the direction of data flow and the exception cases, then provide a fixed-price quote before any work begins. A single SaaS-to-SaaS integration sits at the lower end of project size. A custom REST API backend, or a multi-system integration hub, is larger. No hourly billing — you know the full cost upfront.

What technologies do you use for API development?

Laravel (PHP) for most REST APIs. Fast to build, well-structured, and easy to maintain. Node.js (Express/Fastify) for high-throughput and real-time APIs. ASP.NET Core for Microsoft-stack businesses. Python (FastAPI/Django) for data-heavy and AI-integrated APIs. The technology matches the project requirements.

Can you integrate systems that do not have APIs?

Usually. If the system has a database, we can build a read/write layer on top of it. If it exports CSV files, we can automate the import. If it has a web interface but no API, screen automation is a last resort. We assess the system and recommend the most reliable integration approach.

How do you handle API authentication and security?

JWT tokens for single-page applications and mobile apps. API keys for server-to-server communication. OAuth 2.0 for third-party platform integrations. Rate limiting, input validation, CORS configuration, and encryption in transit (TLS). Security follows OWASP API Security Top 10 guidelines.

What happens if a third-party API changes?

This is common. Xero, Shopify, and other platforms update their APIs regularly. We build integrations with versioning awareness and monitor for deprecation notices. When changes happen, we update the integration before the old version is removed. Ongoing support plans include API update monitoring.

Do you provide API documentation?

Yes. Every API we build gets OpenAPI (Swagger) specification, interactive documentation, authentication examples, and error code reference. For partner-facing APIs, we also build developer portal pages with getting-started guides and code samples.

REST or GraphQL?

REST for most projects. It is simpler, well-understood, cacheable, and suits the majority of business applications. GraphQL when the frontend needs flexible data querying across complex relationships, typically in data-heavy dashboards and mobile apps that need to minimise network requests. We recommend based on the consumer requirements.

Can you take over and fix an existing API?

Yes. We audit existing APIs: code quality, security, performance, documentation. We fix issues, improve performance, add documentation, and continue development. If the API is fundamentally flawed, we recommend a rebuild with a migration path.

Get Started

Talk to an API development company that gets business

We do not just write code. We understand the business problems behind every API project. Describe your situation and we will tell you exactly how we would solve it, what it costs, and how long it takes.