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Fiverr Pro
English
$
USD
I will fix API integration bugs and webhooks in 24 hours
Sean C
About this gig
Is a broken API or silent webhook failure stalling your web application?
Don't let clunky documentation or silent server errors disrupt your data flow. I specialize in dropping into existing codebases, diagnosing architectural bottlenecks, and writing clean, secure backend logic to get your data moving seamlessly.
What I fix fast:
- Auth Failures: OAuth2, JWT tokens, and expired API key handshakes.
- Silent Webhooks: Broken listeners, payload mismatching, and missing headers.
- Data Mapping Errors: Mismatched JSON payloads and database insertion bugs.
- Third-Party Bottlenecks: Stripe, PayPal, CRMs, or completely custom REST APIs.
How we resolve this:
- Code & Log Audit: I isolate the broken endpoint and trace the exact error logs.
- Logic Refactoring: I fix the structural data mapping or connection logic.
- Live Testing: We run simulated data payloads to verify real-world execution.
Please message me with your API documentation or error logs BEFORE ordering so we can confirm the exact scope and get to work immediately.
Respect third-party rights
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Get to know Sean C
Sean C
Senior Full Stack Web Developer
- FromUnited States
- Member sinceJun 2024
- Avg. response time3 hours
Languages
English
Senior Full-Stack Web Developer with nearly a decade of professional agency experience building and optimization custom systems.
Whether you need a high-converting landing page, complex database troubleshooting, or a legacy system migration, I bring corporate-grade standards to every project. Core specialties include PHP (Laravel, CodeIgniter), JavaScript/React, structural database integrity, and seamless API integrations.
I focus heavily on clean code, performance, and transparent communication. Let’s build something stable and scalable for your business!
FAQ
Do you need access to my entire hosting account or cloud provider?
No. To keep your system secure, I only need access to the specific repository, script file, or the error log snippet causing the breakdown. We can discuss temporary, limited access options before starting.
Can you fix custom PHP code or legacy backend integrations?
Yes. I specialize in both modern APIs and legacy or custom MVC framework architectures. I trace payload structures and refactor native backend code to ensure your endpoints talk to each other cleanly.
What if the issue turns out to be on the third-party API provider's end?
If the error stems from an external server outage or restrictive provider rate-limiting, I will deliver a comprehensive technical diagnostic report and a mitigation blueprint you can forward to their support team.
Do you test the API fix on live production data?
I highly recommend testing inside a sandbox, staging environment, or using mock data payloads first. This ensures we thoroughly validate the webhook logic and database mapping before pushing the live fix.
