Reliability under load isn't a single feature — it's the result of a dozen small choices that make degradation graceful instead of catastrophic.
Defaults we apply everywhere
- Every external call has a timeout, retries, and a circuit breaker.
- Every queue has a bounded depth and a documented overflow policy.
- Every service publishes saturation metrics, not just latency.
Failure modes we plan for
The most expensive incidents we've had came from upstream services degrading slowly, not failing fast. Slow failures cascade because nothing trips the breakers — every request "succeeds," it just takes 8 seconds.
The system was fine. Every component was fine. The interaction between components was the outage.
Where to start
If you're building for reliability for the first time, two changes have outsized impact: explicit timeouts on every network call, and a saturation dashboard for every shared resource. Everything else is incremental.
