API & Contracts

APIs are the lifeblood of our microservice architecture. They define exactly how systems interact, acting as strict operational agreements between disparate software boundaries. We treat our contracts as first-class product features.

API-First Design

We design our API contracts before we write the code that implements them. This ensures multiple engineering teams align instantly on data shapes and expected behavior, parallelizing development safely without waiting for a deployed environment.

Dual Specifications: OpenAPI & AsyncAPI

We rely on comprehensive, machine-readable specifications to govern all our communication patterns.

• OpenAPI for Synchronous Traffic: We meticulously document all REST/HTTP traffic using the OpenAPI standard. Every endpoint, query parameter, and response payload is strictly defined and validated.
• AsyncAPI for Event-Driven Traffic: For our asynchronous architecture, we apply the exact same rigor using AsyncAPI. We define strict schemas for every event payload emitted to our message broker, guaranteeing that consumer nodes always receive entirely predictable data streams.

Automated Client Generation

We utilize our contracts dynamically; they are active infrastructure, not static text files.

• SDK Code Generation: We feed both our OpenAPI and AsyncAPI schemas into automated pipelines to generate native, type-safe clients and payload parsers instantly.
• Eliminating Boilerplate: By auto-generating the precise SDKs our services use to communicate with each other, we eliminate entire categories of typos and serialization bugs. This drastically accelerates cross-team integration speed and ensures the consumer is always mathematically aligned with the provider.

Strict Backwards Compatibility

A generated client is only useful if the underlying system can be trusted. We enforce absolute backwards compatibility on all published APIs.

• We never arbitrarily alter a payload type or remove a field from an active schema.
• If a structural paradigm shift is mandatory, we roll out an entirely new operational boundary (e.g., a /v2/ API route) and safely migrate traffic over time.