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Fiverr Pro
English
$
USD
I will fix webhook failures in your nodejs saas
Syed Ali Zafar
About this gig
Failed webhooks can mean missed payments, duplicate records, unsynced bookings, or background jobs that silently disappear.
I will trace and repair one clearly bounded webhook workflow in an existing SaaS codebase. I work with TypeScript, JavaScript, Node.js, NestJS, Express, Next.js, PostgreSQL, Supabase, Stripe, REST APIs, queues, AWS, and Docker.
Depending on the package, I can:
- trace the event from trigger to business outcome
- identify the root cause and failure modes
- implement a focused repair
- add validation, error handling, useful logging, and tests
- harden retries and idempotency
- document the change and support an agreed deployment
I have worked inside inherited healthcare integrations and fintech event-processing infrastructure designed for more than 10 million requests per day. I focus on the failing path, not an unnecessary rewrite.
One workflow means one event trigger, one processing path, and one expected outcome. New applications, broad refactors, multiple unrelated bugs, and ongoing maintenance are not included.
Please message me before ordering Standard or Premium with your stack, symptoms, and available access so I can confirm scope.
Get to know Syed Ali Zafar
Syed Ali Zafar
Senior Backend Engineer APIs, Webhooks and SaaS Reliability
- FromPakistan
- Member sinceApr 2025
Languages
English, Urdu, Hindi, Arabic, German
I help SaaS teams diagnose and repair APIs, payments, authentication, data workflows, background jobs, and production failures.
My core stack includes TypeScript, JavaScript, Node.js, NestJS, Express, Next.js, PostgreSQL, Supabase, Stripe, AWS, and Docker.
I’m comfortable working in inherited codebases, tracing issues across logs and services, and delivering focused changes with tests, useful logging, and a clear handoff. I have worked on healthcare integrations, scientific-data workflows, fintech event processing, and compliance systems. I personally scope and deliver every project.
My Portfolio
Other Software Development Services I Offer
FAQ
What counts as one webhook workflow?
One triggering event, its processing path, and one expected business result. Several unrelated events or outcomes require a custom offer.
Does the Basic package include code changes?
No. Basic provides diagnosis, supporting evidence, risks and a repair plan. Choose Standard or Premium when implementation is required.
Can you work inside an inherited codebase?
Yes. Existing and inherited systems are the focus of this gig. The codebase must be accessible and reasonably runnable or reviewable.
Which technologies do you support?
Ali’s main stack includes TypeScript, JavaScript, Node.js, NestJS, Express, Next.js, PostgreSQL, Supabase, Stripe, REST APIs, AWS and Docker.
Can you fix a Stripe webhook?
Yes, when the issue is a bounded Stripe event-processing workflow. Broader billing or subscription redesign must be scoped separately.
What access will you need?
Usually the relevant repository, sanitized logs, provider documentation, environment information and preferably a test or staging account. Use least-privilege access and never send secrets in plain chat.
What happens if the failure is outside the codebase?
Ali will document the evidence and the external dependency. Changes to an unavailable third-party platform are not included, but the diagnosis will identify the next action.
What does a revision cover?
A revision covers a correction to the agreed deliverable or acceptance criteria. It does not add another webhook, feature, provider or unrelated bug.
Is production deployment included?
Premium includes support for one agreed environment. Standard deployment can be added when it is simple, authorized and discussed before ordering.
Will you display my code or system in your portfolio?
No private code, architecture, credentials or client information will be published without explicit permission.
