--- type: Leaf title: Api Development Practices description: 'API development practices that keep integrations reliable: versioning, auth, documentation. Talk to National Digital about your systems.' resource: https://nationaldigital.com.au/platform-engineering/api-development-and-management/api-development-practices/ tags: - platform-engineering - Platform Engineering - API Development and Management - System Integration - api development - api development best practices - legacy system modernisation - rest api development - api development company australia - cloud engineering timestamp: '2026-09-01T08:26:48.179Z' language: en-AU publisher: National Digital author: Cameron Young authorRole: CEO readingTimeMinutes: 8 wordCount: 1506 datePublished: '2026-09-01' dateModified: '2026-09-01' pillar: platform_engineering canonical: https://nationaldigital.com.au/platform-engineering/api-development-and-management/api-development-practices/ --- _Home — Platform Engineering — API development and management — Api Development Practices_ # Api Development Practices API development practices that keep integrations reliable: versioning, auth, documentation. Talk to National Digital about your systems. **Quick answer:** Strong API development relies on versioning, OAuth 2.0 authentication and clear documentation, letting Australian businesses integrate existing systems reliably without unnecessary rebuilds. ## About this page - Written by Cameron Young, CEO - 8 min read - Updated 1 September 2026 _Platform Engineering — API Development and Management — System Integration_ ## What are the best practices for API development in growing Australian businesses? Effective API development follows versioning discipline, OAuth 2.0 authentication, clear documentation and staged rollout, integrated into existing systems rather than built in isolation. **Additional Context** These practices matter most once a business is running more than a handful of connected platforms, where informal, one-off integrations start breaking every time a connected system changes. _High confidence · Verified 1 Sept 2026_ *API Development* ## What API Development Actually Involves API development is the practice of building the interfaces that let software systems exchange data and trigger actions in each other. For a business running Xero, Shopify, HubSpot, a warehouse management system and a handful of internal tools, APIs are the connective tissue that lets an order placed in one platform update stock, invoicing and customer records in the others without anyone re-typing data. Done well, this sits squarely in the systems layer: how things connect, run and scale underneath the applications staff actually use. ## Core Practices That Keep APIs Reliable A handful of practices separate an API that survives years of change from one that breaks the first time a connected system is upgraded. Versioning discipline means old integrations keep working while a new version rolls out, rather than every downstream partner having to update on the same day. Consistent [authentication solutions for Australian businesses](/platform-engineering/api-development-and-management/authentication), typically OAuth 2.0-based, mean every new integration inherits a security pattern that has already been reviewed, instead of a new bespoke login flow each time. Clear [REST API development best practices for Australian api security standards](/platform-engineering/api-development-and-management/rest-api-development) and OpenAPI documentation let a developer who did not write the original API still build against it correctly. Explicit [API versioning for Australian api security standards](/platform-engineering/api-development-and-management/api-versioning) matters more as the number of connected systems grows: a business with three integrations can get away with informal change management, one with fifteen usually cannot. These practices are not academic. They are the difference between an integration team that spends its time adding new capability and one that spends its time firefighting breakages every time a connected platform pushes an update. *Integration Challenges* ## Why API Development Often Stalls Inside Growing Businesses **Problem:** Many operations and IT teams build APIs ad hoc, project by project, without shared versioning, authentication or documentation standards. Each new integration (to Xero, Shopify, HubSpot or a legacy database) is built slightly differently, creating a fragile web of point-to-point connections that breaks whenever one system changes. **Business Impact** - Time Wasted: Recurring hours lost each week to manual data reconciliation between disconnected systems - Cost Implication: Ongoing rework and support costs as ad hoc integrations break with each system update - Opportunity Cost: Slower reporting, delayed decisions and reduced capacity to take on new integration work **Solution:** A structured API layer, built on consistent versioning, authentication and documentation standards, connects existing platforms cleanly and gives the business a stable foundation for future integration work. **Our Approach** 1. **Audit current integrations** _(Weeks 1-2)_: Map existing point-to-point connections, authentication methods and data flows across core systems 2. **Design the shared API layer** _(Weeks 2-4)_: Define versioning conventions, authentication standards and documentation approach before building 3. **Build and stage rollout** _(Ongoing, phased)_: Implement APIs incrementally, migrating one integration at a time without disrupting daily operations **Expected Outcome:** A documented, consistently secured API layer that new integrations can plug into, reducing rework each time a system changes. *Key Takeaways* ## What Solid API Development Delivers Operationally Well-built APIs give growing Australian businesses a stable, secure connective layer between existing systems, reducing rework and giving IT teams room to add new integrations without starting from scratch each time. - **Versioning prevents downstream breakage** Clear version conventions let you update an API without forcing every connected system to change at the same time, reducing coordination risk. _Important_ - **Authentication standards reduce security review overhead** Using consistent OAuth 2.0 or token-based authentication across every API means each new integration inherits an already-assessed security pattern. _Critical_ - **Documentation determines who can build on your systems** An OpenAPI specification lets internal teams, partners and future contractors integrate correctly without needing the original developer on hand. _Important_ - **Integration before rebuild preserves working systems** Most legacy platforms still serve the business well; a well-designed API layer connects them rather than forcing an unnecessary replacement. _Important_ - **Staged rollout keeps operations running** Migrating one integration at a time, rather than a single big-bang cutover, keeps day-to-day trading unaffected while the platform improves underneath it. _Important_ ## API Security and Integration Context in Australia API development sits inside a wider security and integration landscape. These figures from Australian government sources frame why authentication, versioning and access control matter operationally. - **Cloud computing adoption: 55%** _Significance: medium_ — Share of Australian businesses reporting use of paid cloud computing, the environment most APIs now run and connect within. _(Source: ABS Characteristics of Australian Business 2019-20)_ - **Data breaches from malicious attack: 59%** _Significance: high_ — Share of Australian data breaches caused by malicious or criminal attack, underscoring why API authentication and access control need ongoing attention. _(Source: OAIC Notifiable Data Breaches Report January–June 2025)_ - **Medium business cybercrime cost: $97,200** _Significance: high_ — Average self-reported cost of cybercrime per report for a medium-sized Australian business, a cost category poorly secured APIs and integrations can contribute to. _(Source: ASD Annual Cyber Threat Report 2024-25)_ **Methodology:** Figures are drawn directly from published ABS, OAIC and ASD reports rather than internal project data, and are cited to show the operating environment API development sits within, not to estimate outcomes for any specific engagement. *Build vs Buy* ## Choosing Between REST, GraphQL and What You Already Run REST remains the default for most business integration work: it is well understood, widely supported by platforms like Xero and HubSpot, and simple to secure and document. [Professional graphql implementation solutions for Australian businesses](/platform-engineering/api-development-and-management/graphql-implementation) earn their added complexity when front-end teams need to pull varied, nested data from several sources in a single request, such as a customer portal that shows orders, support tickets and account details together. The right choice depends on the shape of the data being moved and who is consuming it, not which pattern is currently fashionable. ## Where API Development Fits Inside Platform Engineering API development is one part of a wider systems-layer discipline. Platform engineering, in its recognised sense, is about building the internal capability, self-service infrastructure and developer experience that let a team ship and operate software reliably; API work is often the most visible piece of that because it is what other teams and partners actually touch. Businesses exploring [API development and management](/platform-engineering/api-development-and-management) as a standing capability, rather than a one-off project, tend to get more consistent outcomes because the same standards apply to every new integration. Whether to build this capability internally or bring in specialist help usually comes down to how often new integrations are needed, how much in-house engineering time can be committed, and how costly a poorly secured API would be to fix later. For businesses running fewer than a handful of integrations a year, occasional specialist support to set the standards is often more practical than a permanent internal team; for those adding new connections every quarter, building the capability in-house starts to pay for itself. ## Ready to Build an API Layer That Holds Up? Talk to National Digital about auditing your current integrations and designing an API approach that fits the systems you already run. - [Book a Consultation](https://calendly.com/cameron-at-national-digital/discovery) - [Email Our Team](mailto:enquiries@nationaldigital.com.au) - Email: enquiries@nationaldigital.com.au - Phone: 1300 800 855 ## API Development Practices: Common Questions ### What does API development actually mean for a business? API development is the process of designing and building the interfaces that let separate software systems exchange data and trigger actions in each other. For a growing business, this usually means connecting platforms such as Xero, Shopify or HubSpot to internal tools, so information moves automatically instead of being re-entered by hand. ### What are the most important API development best practices? The practices that matter most are version control so updates do not break existing integrations, consistent authentication such as OAuth 2.0, clear documentation using an OpenAPI specification, and staged rollout so new APIs are tested against real data before every connected system depends on them. ### Should we choose REST or GraphQL for a new integration? REST suits most straightforward integration work and is widely supported by common business platforms. GraphQL is worth the added complexity when a front-end or portal needs to pull varied, nested data from multiple sources in a single request. The decision should follow the shape of the data, not which approach is currently popular. ### Is platform engineering the same thing as DevOps? No. DevOps is a set of practices for how development and operations teams work together to ship software. Platform engineering builds the self-service infrastructure and internal tooling that make those DevOps practices repeatable, including much of the API and integration layer underneath applications. ### Should we build API development capability in-house or hire specialists? It depends on frequency and stakes. Businesses adding new integrations only occasionally often get better value from specialist support to set standards once, while those connecting new systems every quarter typically find an in-house capability pays for itself over time. Either path benefits from the same versioning and security standards. ### How does API security fit into wider cyber security obligations? Poorly secured APIs are a growing route into a business's data, and malicious attacks accounted for 59% of data breaches reported to the OAIC in the first half of 2025. Consistent authentication, access control and monitoring on every API reduce that exposure as part of a broader cyber security approach. ## Related reading - [REST API development best practices for Australian api security standards](/platform-engineering/api-development-and-management/rest-api-development/) - [Professional graphql implementation solutions for Australian businesses](/platform-engineering/api-development-and-management/graphql-implementation/) - [How to implement api versioning for Australian api security standards](/platform-engineering/api-development-and-management/api-versioning/) - [Professional authentication solutions for Australian businesses](/platform-engineering/api-development-and-management/authentication/) - [Custom Api Development](/platform-engineering/api-development-and-management/custom-api-development/) ## Related **Parent:** - [API development and management](/okf/platform-engineering/api-development-and-management.md) **Related:** - [REST API development best practices for Australian api security standards](/okf/platform-engineering/api-development-and-management/rest-api-development.md) - [Professional graphql implementation solutions for Australian businesses](/okf/platform-engineering/api-development-and-management/graphql-implementation.md) - [How to implement api versioning for Australian api security standards](/okf/platform-engineering/api-development-and-management/api-versioning.md) - [Professional authentication solutions for Australian businesses](/okf/platform-engineering/api-development-and-management/authentication.md) - [Custom Api Development](/okf/platform-engineering/api-development-and-management/custom-api-development.md) # Citations - [Australian Government API Design Standard](https://www.api.gov.au/) — Guidance on API design principles including versioning, security and documentation, used as a reference for Australian API practice. - [OAIC Notifiable Data Breaches Report January–June 2025](https://www.oaic.gov.au/news/blog/latest-notifiable-data-breach-statistics-for-january-to-june-2025) — Reports malicious or criminal attacks as the leading cause of Australian data breaches, relevant to API authentication and access control decisions.