Contract design
Model resources, commands, errors, pagination, and idempotency around consumer behavior.
System interfaces
API Development & Integration.
An API is an operational contract: its errors, limits, evolution, and recovery behavior matter as much as its successful response shape.
How we use it
We design APIs around consumer tasks, domain ownership, security, and change. Synchronous calls, events, webhooks, and batch exchange are selected according to timing and reliability needs rather than preference.
Architecture decisions
The questions that shape the implementation
Authorization
Check permission at the resource and action boundary, not only at the gateway.
Evolution
Prefer compatible change and define a version and deprecation policy where contracts must diverge.
Integration recovery
Design timeouts, retries, deduplication, replay, reconciliation, and support visibility.
Engineering practice
What disciplined use looks like
Machine-readable contracts
Runtime request validation
Resource-level authorization
Idempotency for retried mutations
Rate and concurrency limits
Correlation IDs and integration dashboards
Failure modes
What we actively design against
Breaking consumers silently
Retry storms and duplicate actions
Authorization only at route level
Webhooks without signatures or replay protection
No reconciliation for missed events
Appropriate use cases
Partner integrations
Mobile and web backends
Payment and billing connections
ERP and CRM integration
Public developer platforms
Event-driven workflows
Technical questions
REST, GraphQL, or events?
The choice depends on consumer needs, ownership, consistency, evolution, and operational complexity. A system may responsibly use more than one interface style.
How do you make integrations reliable?
We design for network failure with bounded retries, idempotency, durable events where needed, traceability, reconciliation, and clear support ownership.
Related expertise