Senior n8n Automation Developer Needed – Complete, Debug & Production-Test AI Business Automation System

We are looking for an experienced n8n automation developer / automation engineer to complete, debug, configure, secure, and production-test an existing AI-powered business automation system.

The system is already built as a collection of n8n workflows. The goal is NOT to rebuild everything from scratch unless technically necessary.

IMPORTANT:
Existing working functions must NOT be removed or replaced without approval. The developer must first review the complete existing system, document all workflows and functions, and then improve it without losing existing functionality.

CURRENT / REQUIRED FUNCTIONS:

• AI Lead Qualification
• Lead Processing and Routing
• Recruiting & Candidate Analysis
• Media Analysis
• Customer Review Analysis
• AI Content Generation
• Automated Follow-Up Sequences
• WhatsApp Communication
• Email Communication
• Manual Call Task Creation
• Website Monitoring
• Daily KPI Reporting
• Central Error Handling
• Facebook Publishing
• Instagram Publishing
• LinkedIn Publishing

We also want to evaluate and add:

• YouTube Publishing
• TikTok Publishing
• Social Media Scheduling
• Social Media Error Handling
• Publishing Status Tracking
• Duplicate Post Protection
• Human Approval before publishing
• Automated AI content preparation for each platform

AI / OPENAI:

OpenAI is used for several automation processes, including:

• Lead qualification
• Candidate/recruiting analysis
• Review analysis
• Media analysis
• Content generation
• Social media content generation
• Classification and decision support
• Structured JSON output

The developer must understand:

• OpenAI API
• Structured outputs / JSON
• Prompt engineering
• API error handling
• Rate limits
• Retries
• Token/cost optimization
• Validation of AI-generated results

AI output must never be blindly trusted when it can trigger important business actions.

N8N:

n8n is the central automation platform.

The developer must have strong practical experience with:

• n8n workflows
• Webhook nodes
• HTTP Request nodes
• Code nodes
• IF / Switch nodes
• Error workflows
• Retry mechanisms
• Credentials
• OAuth2
• Scheduling
• Sub-workflows
• API integrations
• Data validation
• Idempotency
• Race-condition prevention
• Logging
• Workflow versioning
• Production deployment

SERVER / HOSTING:

The system requires a reliable n8n environment.

Possible hosting options include:

• n8n Cloud
OR
• Self-hosted n8n using Docker / Docker Compose

For self-hosting, experience with the following is preferred:

• Linux server / VPS
• Docker
• Docker Compose
• HTTPS / SSL
• Domain configuration
• Reverse proxy
• Environment variables
• Backups
• Server security
• Firewall configuration
• Monitoring
• Log management
• n8n updates

For larger production installations, knowledge of PostgreSQL and Redis is also beneficial.

GOOGLE:

Google services may be used for business automation.

Possible integrations include:

• Gmail
• Gmail Trigger
• Google Sheets
• Google Drive
• Google Calendar

The developer should understand:

• Google Cloud Console
• Google OAuth2
• OAuth consent configuration
• API permissions/scopes
• Redirect URLs
• Credential management

WHATSAPP / META:

WhatsApp communication requires the Meta / WhatsApp Cloud API.

The developer should understand:

• Meta Developer App
• WhatsApp Business Platform
• WhatsApp Cloud API
• Business Portfolio / Business Manager
• Phone Number ID
• Access Tokens
• Webhooks
• Incoming messages
• Message templates
• Customer service messaging window
• Opt-out handling
• Message status callbacks
• API errors
• Duplicate-message prevention

Facebook and Instagram publishing may also require Meta API configuration and the appropriate account permissions.

SOCIAL MEDIA:

The system should support or be prepared for:

• Facebook
• Instagram
• LinkedIn
• YouTube
• TikTok

The developer must understand that each platform has different:

• APIs
• OAuth requirements
• Permissions
• App review requirements
• Publishing limitations
• Media requirements
• Rate limits
• Token expiration rules

The final implementation must follow the official platform APIs and current platform requirements.

EMAIL:

Email automation may use Gmail or another supported email provider.

Functions include:

• Automated follow-up emails
• Incoming reply detection
• Error notifications
• KPI reports
• Website alerts

The developer must prevent:

• Duplicate emails
• Follow-ups after a customer has replied
• Follow-ups after opt-out
• Incorrect recipient matching
• Endless retry loops

DATABASE / DATA STORAGE:

The system needs reliable storage for workflow states, logs, follow-ups, publishing status, and duplicate protection.

Depending on the final architecture, this may use:

• PostgreSQL
• n8n Data Tables
• Google Sheets for selected reporting/data functions

The developer should recommend the most reliable production architecture.

Important stored information may include:

• Lead status
• Follow-up status
• Contact preferences
• Opt-outs
• Message IDs
• Social publishing IDs
• Error logs
• Human approval status
• KPI data
• Idempotency keys

SECURITY REQUIREMENTS:

Security is important.

The developer must review:

• Webhook authentication
• API secrets
• OAuth credentials
• Environment variables
• Access tokens
• Database credentials
• Input validation
• API request validation
• Permissions
• Public endpoints
• Secret exposure

Passwords, API keys and access tokens must NOT be hard-coded directly into workflows.

RELIABILITY REQUIREMENTS:

The system must be designed to avoid:

• Duplicate WhatsApp messages
• Duplicate emails
• Duplicate social media posts
• Duplicate call tasks
• Race conditions
• Infinite loops
• Broken retry logic
• Null-item workflow failures
• Incorrect webhook processing
• Lost workflow states
• Follow-ups after customer response
• Follow-ups after opt-out
• Incorrect AI-triggered actions

ERROR HANDLING:

Every important workflow should have a defined:

• Success path
• Failure path
• Retry path
• Stop path
• Human intervention path where necessary

The system should provide centralized error reporting and enough logging to identify why a workflow failed.

TESTING:

The developer must NOT only check whether the JSON imports successfully.

Every important workflow must be tested end-to-end with real or safe test credentials.

Testing should include:

• Successful API calls
• Invalid inputs
• Missing data
• API timeouts
• Rate limits
• Authentication failures
• Duplicate webhook events
• Duplicate execution attempts
• Customer replies
• Customer opt-outs
• Failed email delivery
• Failed WhatsApp requests
• Failed social publishing
• OpenAI failures
• Server/network failures where practical

Existing functions must also be regression-tested after changes.

IMPORTANT DEVELOPMENT RULE:

Before making modifications, the developer must create an inventory of the existing workflows, nodes, integrations, and functions.

Existing functionality must not be removed without approval.

After every major modification, the developer must verify that all previously working functions are still present and operational.

DOCUMENTATION REQUIRED:

At completion, we require documentation explaining:

• Required server/software
• Required accounts
• Required APIs
• Required credentials
• Environment variables
• n8n installation/configuration
• Google configuration
• OpenAI configuration
• Meta/WhatsApp configuration
• Facebook/Instagram configuration
• LinkedIn configuration
• YouTube configuration if implemented
• TikTok configuration if implemented
• Database/storage configuration
• Workflow activation order
• Testing procedure
• Backup procedure
• Basic troubleshooting

EXPECTED DELIVERABLE:

We want a stable, secure, documented, and fully tested n8n automation system that is ready for production use after the required accounts, credentials, APIs, and permissions have been configured.

The developer should clearly identify anything that cannot be completed because of external platform approval, account verification, API restrictions, or missing credentials.

REQUIRED SKILLS:

• Advanced n8n
• OpenAI API
• REST APIs
• Webhooks
• OAuth2
• Google APIs
• Gmail / Google Workspace
• Meta Graph API
• WhatsApp Cloud API
• Facebook API
• Instagram API
• LinkedIn API
• YouTube API
• TikTok API
• Database design
• PostgreSQL
• Docker / Linux
• API security
• Error handling
• Automation testing
• Production deployment

WHEN APPLYING:

Please include:

1. Your experience with complex n8n systems.
2. Examples of similar automation projects.
3. Your experience with OpenAI API.
4. Your experience with Meta / WhatsApp Cloud API.
5. Your experience with social media publishing APIs.
6. Your experience with Google OAuth/API integrations.
7. Your experience debugging race conditions and duplicate executions.
8. Whether you can test the complete system end-to-end.
9. Your estimated timeframe.
10. Whether you can provide final technical documentation.

Please do not apply if your experience is limited to simple n8n workflows. We need someone who can review and production-test a multi-workflow automation system.