Timeline
2 – 8 weeks
Location
Wollongong, AU
Overview
I design and build production-grade REST APIs and backend systems for web and mobile applications. Whether you need a new API from scratch, integration with third-party services like Stripe, Twilio, or HubSpot, or a backend to power your existing frontend, I deliver well-structured, documented, and tested code that your team can maintain and extend.
APIs are the plumbing of modern business software and like plumbing, you only notice them when they leak. I build REST and GraphQL APIs with Node.js and TypeScript that are versioned, documented, monitored, and secured from the first endpoint, so the systems that depend on them your website, mobile app, partners, internal tools can rely on them for years.
Integration work is just as common as greenfield APIs: connecting your CRM to your billing system, syncing inventory between your store and your warehouse software, or wrapping a legacy system in a clean modern interface. I handle authentication schemes, rate limits, webhooks, retries, and the inevitable quirks of third-party APIs so data flows reliably between the tools you already use.
What's Included
- RESTful API design following industry conventions
- Authentication: JWT, OAuth 2.0, API keys
- Third-party service integrations (Stripe, Twilio, HubSpot, etc.)
- Database schema design and ORM setup
- Input validation and error handling
- Rate limiting and security middleware
- API documentation (OpenAPI / Swagger)
- Unit and integration tests
Key Features
Clean API Architecture
Controller-service-repository pattern, consistent error responses, and RESTful conventions APIs built to be maintained, not just to work once.
Secure Authentication
JWT access/refresh token flows, OAuth 2.0 with Google/GitHub, role-based access control, and API key management for external clients.
Third-Party Integrations
Stripe, Twilio, SendGrid, HubSpot, Xero, AWS S3, and more integrated cleanly with webhook handling and retry logic.
Full API Documentation
OpenAPI / Swagger documentation generated from your code so your frontend team, mobile developers, and external partners always have accurate API references.
Tested & Reliable
Unit tests for business logic and integration tests against a real test database so you can deploy with confidence and catch regressions early.
Performance Optimised
Database query optimisation, Redis caching for hot paths, connection pooling, and pagination APIs built to stay fast under load.
How I Work
- 1
Integration mapping
We document which systems need to talk to each other, what data flows where, and what happens today when it does not the manual workarounds tell us where the value is.
- 2
API design
Endpoint structure, authentication, data contracts, and error behaviour designed and reviewed before implementation, so consumers know exactly what to expect.
- 3
Build & document
Implementation in Node.js and TypeScript with automated tests and OpenAPI/Swagger documentation generated alongside the code.
- 4
Security & load review
Authentication, input validation, rate limiting, and load behaviour verified before anything is exposed to production traffic.
- 5
Deploy & monitor
Production deployment with logging, alerting, and uptime monitoring, so failures are caught by dashboards rather than by your customers.
Ways to Work Together
Fixed-Scope API Project
A defined API or integration designed, built, documented, and deployed for an agreed quote.
Best for: A specific integration or a new API for your product.
Integration Retainer
Ongoing capacity for new integrations, API maintenance, and adapting to third-party API changes before they break your workflows.
Best for: Businesses whose operations depend on many connected systems.
API Audit & Rescue
Reviewing an existing API for security, performance, and reliability problems then fixing them.
Best for: Teams inheriting an undocumented or fragile API.
Real Project Example
Medical Supplier Management System APIs and integrations at the core
The supplier management platform I built for Mendoza Brothers Holdings runs on REST APIs with JWT authentication, real-time communication over Socket.io, and Excel bulk import/export integration. The API layer connects suppliers, staff, and administrators around a single source of truth.
- REST API with JWT auth and role-based access control
- Real-time messaging via Socket.io integrated alongside the REST layer
- Excel import/export integration eliminated weekly manual data entry
- Contributed to a roughly 60% reduction in admin workload
Serving Wollongong & All of Australia
Based in Wollongong and serving teams across Australia, I work with the Australian SaaS tools your business already runs on accounting, CRM, logistics and build integrations in your time zone, with documentation your team can pick up without a handover meeting.
Frequently Asked Questions
Further Reading
Related Services
Ready to get started?
Tell me about your project and I will get back to you within 24 hours with a plan and quote.