n8n Slack Job Ad Search: Coresignal + Claude Candidate Shortlists

Instantly shortlist Coresignal candidates from Slack job posts—automatically

This n8n workflow monitors a Slack channel for new job ad links, retrieves the full job from Coresignal, uses Anthropic Claude to generate structured search filters, and posts a ranked candidate shortlist back to Slack—ready for your recruiting team to review.

What this workflow does

• Slack Trigger: Fires on every new message in your selected Slack channel.
• Job URL extraction: Extracts job URLs from the message text, ignores bot/subtype events to prevent loops, and stops if no job URL is found.
• Deduplication: Deduplicates job IDs across previous executions to avoid reprocessing reposts and Slack event retries.
• Fetch job ad from Coresignal: Looks up each job in Coresignal and fetches the full job posting details.
• Claude-driven filters: Sends the job ad to Anthropic Claude and parses the response into structured filters (e.g., target titles, skills, countries, minimum experience, seniority).
• Elasticsearch-style search: Builds an Elasticsearch DSL query from those filters, searches Coresignal’s employee index, and retrieves the top matching profiles (ranked).
• Post results to Slack: Formats a Slack mrkdwn shortlist and posts it back to the originating channel, continuing for any additional job URLs in the same message.

Use cases

• Recruiters drop new roles into Slack, and the team gets candidate shortlists instantly.
• SaaS operators keep hiring intake centralized: job links → structured matching → Slack-ready results.
• Automation engineers want an end-to-end n8n Slack job ad search workflow with Coresignal + Claude filtering.

Technical details

• Slack integration: Slack Trigger + Slack message posting
• Coresignal nodes: Requires the n8n-nodes-coresignal-api community node and Coresignal credentials (Multi-source Jobs + Multi-source Employee access)
• AI filtering: Anthropic Claude API key for structured filter generation
• n8n logic: set, code, slack, sticky note, split in batches