API Integrations
The connective tissue between your systems: idempotent, monitored, and boringly reliable.
Overview
Integrationsarewheremostproductionincidentsareborn:awebhookretriedtwice,aschemachangedwithoutnotice,atimeoutthatsilentlydropsanorder.Doneproperly,theybecometheleastinterestingpartofyourplatform.
We build integration layers with idempotency, retries with backoff, contract tests against partner APIs, and dashboards that show exactly where a payment or shipment is in flight.
- Integration map and failure-mode analysis
- Typed API contracts and documentation
- Integration services with retry and replay
- Reconciliation and alerting dashboards
- Sandbox and production runbooks
Benefits
What you get out of it.
Exactly-once effects
Idempotency keys and ledgered state, so a retried webhook never charges a customer twice.
Resilient to partner outages
Queues, backoff, and circuit breakers keep your platform standing when a third party does not.
Contract tested
Automated checks against partner schemas that fail in CI rather than at month-end.
Traceable end to end
Every transaction has a correlation id you can follow from your UI to the partner's response.
Approach
How a integrations engagement runs.
Four stages, each ending in something you can review. Scope stays flexible; the budget and the date do not.
Map the flows
Every system, event, and failure mode, plus the reconciliation rules that must hold.
Design contracts
Typed schemas, versioning strategy, and idempotency semantics agreed before implementation.
Build & sandbox test
Implementation against partner sandboxes with contract tests and fault injection.
Observe
Dashboards, alerts on stuck queues, and a documented replay path for failed events.
Technologies
- Paystack
- PayPal
- Stripe
- REST
- GraphQL
- Webhooks
- Kafka
- RabbitMQ
- OpenAPI
- Postman
Related work
Where this has been applied.
Northwind Commerce
A replatformed storefront that survived Black Friday at eleven times normal traffic.
Kasi Pay
A payments app for township merchants, designed for low-end devices and expensive data.
Freight OS
A single operating system for 240 vehicles, 14 depots, and the clients who need to know where their freight is.
FAQ
Integrations, in practical terms.
The questions clients ask before committing to this kind of work.
Integrations
Let's talk about integrations.
A 45-minute call is usually enough for us both to know whether this is a fit. No deck, no discovery fee for the first conversation.
Or email hello@bonangtech.com