If your uptime story only makes sense in a datacenter in Virginia, you have already lost half your users before they finish loading the hero section.
In South Africa, Eskom is a feature requirement, not a footnote. Stage four is a good day. Stage six means your API might as well be on holiday while someone’s trying to pay for airtime or submit a form.
Here is the uncomfortable truth: resilience is not a banner that says “we use Cloudflare.” It is how your app behaves when the signal drops mid-request, when the phone switches to 2G, when the user comes back online three minutes later with half a form filled in.
Assume the network is hostile
Treat every request like it might fail. Retries with backoff, idempotent writes where money or identity is involved, and clear UI when something did not land — not a white screen and a prayer.
If your only error state is “something went wrong,” you have outsourced empathy to the browser.
Cache what keeps people moving
Static assets, fonts, anything that does not need a round trip every time. Service workers are not fashion; they are dignity for someone on expensive, intermittent data.
You do not need a PWA manifest on day one, but you do need to ask: what still works when the pipe is thin?
Webhooks and background jobs: plan for the gap
Load shedding loves eating confirmations. Queue retries. Log failures somewhere you will actually read. Never trust a success redirect alone for payments or bookings — your user trusted you with money or time; the platform should earn that trust back with receipts.
Test like you live here
Run your critical path on:
- Throttled 3G
- Airplane mode toggled mid-flow
- A cheap Android phone with twelve tabs open
If it feels embarrassing in that environment, fix it before you pitch “world-class.”
The point
We are not building for hypothetical always-on users. We are building for cousins on prepaid, founders on fibre that still drops, and communities where “I’ll do it when the power is back” is a scheduling constraint.
Ship software that respects that reality. The rest is marketing.