Browse categories
Explore
Fiverr Pro
English
$
USD
I will fix payment webhook and subscription sync bugs
Lewis
About this gig
Payment succeeded but your app did not update access? Webhook retries causing duplicates? Failed invoices or subscription changes leaving the wrong state?
I will diagnose one defined payment webhook or subscription-sync problem, reproduce the failure and deliver the package you choose.
Depending on scope, the work can include signature and endpoint checks, duplicate or out-of-order event handling, checkout and subscription-state tracing, application-state updates, focused regression tests, and concise verification notes.
This Gig repairs one existing flow. It does not design an entire billing platform, deploy to production, or redesign your architecture. If several systems or repositories are involved, please use a custom scope rather than ordering a fixed package.
The service covers application code, sanitised logs, test-mode events and webhook configuration. It does not include managing a financial account, initiating payouts or refunds, handling funds, changing another person's billing account, or receiving live financial credentials. Never send secret keys in chat.
Get to know Lewis
Lewis
API, webhook and payment integration troubleshooting
- FromUnited Kingdom
- Member sinceMay 2021
- Avg. response time1 hour
- Last delivery1 year
Languages
English, Polish
I diagnose broken payment webhooks, subscription syncs, CMS/API connections and unreliable automation. My process is simple: reproduce the failure, find the root cause, make the agreed repair, add focused tests and document the handover. I also built a brand-neutral Integration Rescue Lab with 15 passing tests for signed events, duplicate and stale delivery, secure API pairing, retries, stalled-worker recovery and alerts. Please do not send passwords or secret keys in chat.
Other Software Development Services I Offer
FAQ
What should I send first?
Expected behaviour, actual behaviour, recent sanitised delivery logs, the relevant handler and whether test mode is available.
Does the Basic package include a code change?
No. It provides the root cause, evidence and a fixed repair scope.
Can you work without production access?
Usually yes for diagnosis. A test environment and sanitised logs are preferred.
What is not included?
A full billing rebuild, tax or accounting advice, multiple payment processors, deployment, or unrelated application bugs.
