Build · Service
APIs
designed as reliable contracts between systems.
We design, build and integrate secure APIs for products, partners and internal platforms — creating clear interfaces around business capabilities, data and workflows with maintainability, versioning and operational visibility built in.
When APIs become part of the architecture
APIs become important when capabilities need to be reused without tightly coupling the systems behind them.
As products, partners and internal platforms grow, direct database access, one-off connections and duplicated backend logic become harder to control. APIs create clearer boundaries around what systems expose and how other software can depend on them.
- 01Several applications need the same capabilityWeb, mobile, internal and partner experiences all depend on the same data or business behaviour.
- 02External partners need controlled accessThird parties need selected capabilities without direct access to internal platforms or implementation details.
- 03Backend logic is duplicated across productsDifferent applications are implementing the same rules because no reusable service or interface exists.
- 04Existing APIs have become inconsistentContracts, authentication, naming, errors and versioning differ enough that every integration becomes unnecessarily difficult.
The API decisions
Before exposing another endpoint, decide what the interface should own and guarantee.
- 01What capability should the API expose?Which business operation, data or service should consumers be able to use without understanding the implementation behind it?
- 02Who will consume it?Is the interface for internal applications, mobile products, partners, customers or public developers?
- 03What should the contract guarantee?Which fields, behaviours, errors and response expectations need to remain predictable for consumers?
- 04How should access be controlled?What authentication, authorisation, scopes, keys, roles or organisation boundaries are required?
- 05How should change be managed?What can evolve without breaking consumers, and when should versioning or deprecation become explicit?
- 06How will we know the API is behaving as expected?Which usage, latency, errors, limits and downstream dependencies need to be visible in production?
What API Development & Integration can include
APIs can expose data, business capabilities and platform services without exposing the complexity behind them.
- 01REST APIsResource and action interfaces for applications, partners and internal consumers.
- 02GraphQL APIsFlexible query interfaces where consumers need controlled access to varied or connected data.
- 03Partner & external APIsSecure interfaces designed for third parties, ecosystem partners and customer integrations.
- 04Internal service APIsReusable interfaces between applications, services and internal platforms.
- 05Webhooks & event interfacesOutbound notifications and event-driven contracts for changes that consumers need to react to.
- 06API gateways & managementAuthentication, routing, throttling, policies, usage controls and lifecycle management around API estates.
Related API & platform areas
APIs often sit between product engineering, system integration and data platforms. These areas commonly shape what the interface needs to expose and how it will be consumed.
Engagement scope
What we actually do.
- 01API discovery & capability mappingIdentify consumers, business capabilities, system ownership, data boundaries and current interface constraints.
- 02API contract & interaction designDefine resources, operations, schemas, validation, errors, pagination, idempotency and interaction behaviour.
- 03API engineeringBuild secure APIs and supporting services around the required business logic and backend systems.
- 04Third-party API integrationConsume external APIs, webhooks and services with explicit handling for authentication, limits, failures and provider change.
- 05Security, gateway & policy implementationImplement access control, token handling, rate limits, routing, policies and gateway behaviour appropriate to the consumers.
- 06Documentation, testing & operational readinessCreate API specifications, examples, contract tests, monitoring and lifecycle controls so consumers can adopt the interface and teams can operate it with confidence.
Engagement options
Ways we can build with you.
Not sure which starting point fits? We will help you choose.
- New API capabilityDesign and build a new API around a defined business capability or product requirement.Useful whenApplications or partners need reliable access to functionality that is not currently exposed cleanly.
- API modernisationReview and restructure an existing API estate, improving contracts, consistency, security and lifecycle management.Useful whenAPIs exist but have become difficult to consume, change or govern.
- API platform programmeCreate shared standards, gateways, documentation and reusable interface patterns across a wider organisation.Useful whenSeveral teams publish APIs and need a more consistent platform approach.
What you leave with
APIs consumers can depend on — without depending on implementation detail.
The exact outputs depend on the environment, but the engagement should leave teams with stable interfaces, clear ownership and enough operational visibility to evolve them safely.
- 01Defined API boundariesClear decisions about which capabilities and data the interface should expose.
- 02Consistent contractsPredictable request, response, validation and error behaviour for consumers.
- 03Secure access modelAuthentication, authorisation, scopes and policies appropriate to the API audience.
- 04Production-ready API integrationsProduction APIs connected to the systems and services that own the underlying capability.
- 05Developer-ready documentationClear specifications, examples and integration guidance for internal or external consumers.
- 06Observable API operationUsage, latency, errors and dependencies visible enough to support continued operation and change.
Our engineering approach
Design the contract around the capability — not around the database behind it.
- 01Understand the consumersClarify who needs the API, what they are trying to accomplish and what they should not need to know.
- 02Define the boundaryDecide which capability, information and responsibilities belong behind the interface.
- 03Design the contractMake requests, responses, errors, authentication and change behaviour explicit before implementation hardens them.
- 04Engineer and testBuild the service, integrate backend systems and validate contracts, security and failure behaviour.
- 05Operate the lifecycleObserve usage, manage versions and deprecation, and evolve the API without creating unnecessary consumer disruption.
From API to connected platform
A working endpoint is a milestone. Consumers still need the interface to remain stable, secure and operable.
API Development & Integration can move directly into the capabilities required to connect systems, operate the platform and make the data behind the interface reliable.
FAQ
Common questions about API Development & Integration.
API development is the design and engineering of interfaces that allow applications, services and partners to use data or business capabilities without directly depending on the systems behind them.
API Development focuses on the interface itself — contracts, security, lifecycle and developer usability. System Integration focuses on how several applications, platforms and workflows operate together end to end. APIs are often one of the mechanisms used inside a wider integration solution.
Yes. REST APIs are appropriate for many web, mobile, partner and internal integration use cases.
Yes, where flexible data querying or aggregation creates enough value to justify the model and operating complexity.
Yes. We can integrate external services while handling authentication, rate limits, provider errors, retries and other operational concerns explicitly.
Yes. External APIs require particular attention to authentication, documentation, stability, versioning and support because consumers operate outside the engineering team that owns the API.
Security can include authentication, authorisation, scopes, token handling, encryption, gateway controls, rate limits, validation and monitoring depending on the sensitivity and audience.
We prefer compatible evolution where possible. When breaking change is unavoidable, versioning, migration guidance and deprecation periods should be deliberate rather than introduced reactively.
Yes. Documentation can include OpenAPI specifications, endpoint descriptions, schemas, examples, error behaviour and integration guidance.
Yes. We can assess inconsistent or tightly coupled APIs and progressively improve contracts, security, documentation, versioning and architecture.
Yes. APIs commonly provide the backend capability shared by web, mobile and other client applications.
Yes. AI services can be exposed through APIs, but deterministic contracts, validation, access controls and operational behaviour should still remain explicit.
Yes. We can continue through cloud operations, observability, security, application management and ongoing API engineering.
