The bottom line
Almost every third-party integration we are called in to fix breaks for the same handful of reasons. Webhooks are received but the handler is not idempotent, so a single retried event double-charges the customer, double-creates the contact, or double-fulfils the order. Authentication tokens expire and the refresh-token rotation was never implemented, so the integration stops working silently at 2am. The third party rate-limits a burst of legitimate traffic and the integration has no backoff strategy, so events queue up faster than they can be processed and the backlog never recovers. The signature on a webhook is not verified, so a spoofed event triggers a real action. in Brighton These are not edge cases — they are the boring, predictable reality of running third-party integrations at scale. JW Digital integrates third-party APIs with these failure modes designed in from day one. Idempotency keys on every side-effectful operation. Signed webhook verification. Exponential backoff with jitter. Dead-letter queues for events that exhaust retries. Reconciliation jobs that compare your system state against the third party's source of truth and flag any drift. Secrets management via proper vaults rather than .env files. The integration becomes invisible — which is exactly what a good integration should be. Third-party integrations also rarely live alone. A Stripe integration usually needs to write to your database, sync to your CRM, trigger marketing automation, and notify your operations team. We design integrations alongside our custom API development, database design, and API integration & automation teams so the integration plays nicely with the rest of the backend — rather than becoming a fragile island your operations team treats with caution.
