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Fiverr Pro
English
$
USD
I will fix n8n json, array and date data errors with a custom code node
Stephen C
About this gig
Your n8n workflow stops, or returns "undefined", because the data doesn't look the way the next node expects? Nested JSON, arrays, dates and loops are where the visual nodes run out. That's where I write the code.
I fix or write the JavaScript in your n8n Code node, test it against your sample data, and explain what was wrong so it doesn't happen again.
WHAT I CAN FIX OR BUILD
- Code node errors and bad return formats
- Data not passing between nodes ("undefined", empty output)
- Nested JSON, arrays, duplicates and merging
- Date and time formatting and time zones
- Looping and batching over lists
- Cleaning messy CSV, API or form data
- data extraction
- Web scrapping
- n8n automation
- workflow automation
- json transformation
HOW IT WORKS
1. Send me a workflow export (credentials removed), the error, and a sample of the data.
2. I confirm the scope and price before you order.
3. I fix the script, test it on your sample, and send the working code with plain-English notes.
Not included: building full workflows from scratch, server setup, or fixing problems in outside apps and APIs themselves.
Have an urgent problem? Message me the error first and I'll tell you honestly if I can fix it.
Get to know Stephen C
Stephen C
n8n API integration, Webhook and Workflow Automation Specialist
- FromUnited States
- Member sinceOct 2026
Languages
English, French
I help businesses build and connect custom n8n automations across APIs, webhooks, databases, AI tools, and business apps.
I specialize in n8n workflow automation, API integrations, self-hosted n8n, PostgreSQL/RAG workflows, custom JavaScript for Code Nodes, and payment webhook automation.
Have a workflow that breaks at the API, database, webhook, or data-processing stage? Send me the workflow details or screenshots. I’ll review the requirements and help define the right implementation before we start.
FAQ
What do I send you?
Your workflow export with credentials removed, the error message, and a small sample of the data. Fake or anonymized data is fine
Do you need my passwords or API keys?
No. Never send them in chat. I work from the export and sample data, so replace credentials with placeholders first.
Can you fix problems that aren't about code?
Maybe. This gig focuses on Code node scripts and data problems. If the cause is a broken app connection, I'll tell you before you order.
What do I get back?
The fixed script, an updated workflow file if needed, test results on your sample, and short notes on what was wrong.
Do you work on n8n Cloud and self-hosted?
Yes, the Code node works on both. If your instance blocks outside modules, I'll write the fix with built-in JavaScript only.
What if my problem is bigger than the package?
Message me first. I'll confirm scope and price before you order, so there are no surprises.
