API & integration development

What it is

APIs designed and documented, plus the integrations that consume them — payment, CRM, logistics, telephony, data providers and internal systems.

Why businesses need it

Every product eventually has to hand data to something else. Unreliable integration is the reason a product looks broken even when nothing in it failed.

What MIWEBX delivers

• REST and GraphQL API design with versioning
• Payment, KYC, SMS, email and logistics provider integration
• CRM, ERP and accounting system synchronisation
• Webhook ingestion with signing, replay and dead-letter handling
• Data pipelines and scheduled ETL between systems

Core features

• Contract-first design with generated types on both sides
• Idempotency keys and retry policy on every write
• Rate limiting, quotas and back-pressure
• Structured logs and trace correlation across hops
• Sandbox and production credential paths
• Reconciliation reports that prove nothing was dropped

Technical capabilities

• OpenAPI or schema file as the source of truth, with server and client types generated from it
• Inbound webhooks signature-checked, stored raw, then processed by idempotency key
• Rejected and failed payloads parked in a dead-letter store with attempt count and a replay path
• Outbound calls wrapped in timeouts with bounded, jittered retries so a slow provider cannot cascade
• Contract tests run against provider sandboxes in CI, with recorded fixtures for offline work
• Schema changes released additively behind a documented deprecation window
• Correlation identifiers carried through every hop into the log line

How we build it

• Document each system's data and who owns it before designing anything
• Write the contract: endpoints, events, error semantics and rate limits
• Build the service layer and one adapter per provider behind that contract
• Test against sandbox credentials, including replay, timeout and partial failure
• Publish the documentation, monitoring and alerts, then move the first consumer across
• Reconcile live records against the provider to prove nothing was dropped

Technology stack

• Node.js
• Fastify
• TypeScript
• Python
• PostgreSQL
• Redis
• GraphQL

What you receive

• Published API documentation and an OpenAPI or schema file
• Integration code with tests against provider sandboxes
• Credential and environment setup guide
• Monitoring for failures, drift and lag
• Runbook for replaying or reconciling missed events

Business benefits

• Systems agree on the same record without manual entry
• Provider outages degrade gracefully instead of corrupting data
• New integrations follow a pattern, not a one-off
• Failures are visible before a customer reports them