APIs and integrations

Connecting systems without manual data transfer

I design integration interfaces with clear data, error rules and responsibility for processing.

The connection should be reliable

An integration is more than one HTTP request

Data, authentication, validation, retries, logging and error state need to be defined. These decide long-term operation.

What I can help solve

From interface design to connecting an existing service.

REST API design

Source data, endpoints, validation and versioning when needed.

Webhooks and synchronisation

Processing events and data between internal and external systems.

Integration resilience

Error handling, retries, rate limiting, logging and monitoring.

Typical scenarios

Internal system and external service
CRM, ecommerce or reservation system
Synchronising customers, orders or statuses
Secure webhook processing

Technical view

An integration layer separates data-transfer rules from particular systems so changes can be managed in one place.

System A
   ↓
REST API
   ↓
Integration layer
   ├── Database
   ├── System B
   └── External API

How we work

Data, failure, retry

Contract Inputs, outputs and validation rules.
Flow Where data originates, transforms and ends.
Operation Logs, retries and visible error states.

A process-led decision

Not every integration needs to be realtime and fully automated

An API integration is not just an endpoint. It must define what happens after a timeout, a duplicate request or a schema change. Idempotency means a repeated request does not create a duplicate result; retries therefore need limits and recorded outcomes.

Relevant technologies

REST JSON Webhooks OAuth / API keys Validation Retry Logging Monitoring

Example scenario

Connecting an internal system to an external service through a REST API

The integration receives a change, validates data, records the result and safely handles a temporary target-service failure.

System A
  ↓ request
Integration layer
  ↓ validated transfer
External API

Need to connect systems?

Describe the systems, data and direction of transfer. A clear integration design can be the first step.

Discuss integration →

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