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36 Production DAG Pipelines
Case Study · n8n & AI Workflow Automation

Platform & Client

Multi-SaaStr Workflow & CRM

Services Provided

n8n Orchestration & RevOps

Technology Core

n8n · Redis · PostgreSQL · FastAPI

Annual Cost Reduction

$35,900 / yr Saved vs. Zapier

Dakeek Ops SuiteAutomation & RevOps
+40% conversion lift · 100% privacy
+ 40%

Enterprise Conversion Lift

Sub-300ms AI lead scoring routes enterprise buyers to sales reps before prospects drop off.

94%

Manual Data Entry Eliminated

Automated webhook synchronization reconciles CRM, billing, and project tracking records automatically.

$35.9K

Annual Cloud Automation Savings

Self-hosted containerized n8n cluster completely eliminates per-task commercial SaaS markups.

01 / The Challenge

Overcoming Punitive Cloud SaaS Pricing & Dropped Webhooks

High-velocity revenue teams face crippling task execution limits and exponential subscription fees on commercial iPaaS platforms (Zapier, Make.com) — while suffering from silent lead losses when cloud webhooks fail without automated retry mechanisms.

Punitive Cloud Pricing

Zapier and Make.com scale costs exponentially as monthly event volumes reach hundreds of thousands, penalizing operational growth.

Fragile Webhook Pipelines

Dropped webhooks silently lose high-value enterprise leads when external CRM endpoints experience transient network outages.

02 / Systems Architecture

Three Strictly Decoupled Production Tiers

TIER 01

Edge Ingress Dispatcher

FastAPI and Redis streams validate incoming webhooks, verifying HMAC signatures and enforcing cryptographic idempotency keys to eliminate duplicates.

Ingress EngineFastAPI (Async Python 3.11)
IdempotencyRedis 7 Atomic Lua Guard
Auth SecurityHMAC SHA-256 Signatures
TIER 02

n8n DAG Workflow Fleet

Executes 36 production DAG workflows coordinating real-time LLM lead enrichment, automated invoice compiling, and bi-directional CRM synchronization.

Orchestratorn8n Enterprise (Self-Hosted)
Active Pipelines36 Production Workflows
AI IntegrationGPT-4o Entity Scoring
TIER 03

Dead-Letter & Alert Plane

Diverts transient network failures into transactional retry queues with automated exponential backoff and instant interactive Slack executive alerts.

Retry ArchitectureExponential Backoff Queue
Packet Drop Rate0.00% Lead Loss
Ops AlertingSlack BlockKit Actions
03 / Verified Technology Stack

Production Engineering Tooling

Workflow Engine

n8n Workflow Hub

Self-Hosted · 36 Production DAGs

Orchestrates multi-step business pipelines coordinating AI lead enrichment, billing, and CRM synchronization.

Edge Dispatcher

FastAPI Ingress

Python 3.11 · HMAC Verification

High-throughput ingress gateway validating incoming webhooks and enforcing cryptographic payload signatures.

Idempotency Queue

Redis 7 In-Memory

Lua Scripts · Dead-Letter Retry

Guarantees zero duplicate transactions through atomic key leases and manages exponential backoff queues.

Persistent State

PostgreSQL 15

Relational Ledger · Foreign Keys

Central revenue database storing verified transaction logs, lead scoring metrics, and audit records.

Executive Portal

Next.js 15.1

App Router · React 19 · Charts

Unified internal executive dashboard visualizing real-time pipeline throughput and automation cost savings.

AI Enrichment

OpenAI GPT-4o

Structured Output · Sub-300ms

Parses unstructured inbound emails and RFP forms to classify enterprise intent and budget capacity automatically.

VPC Deployment

Docker Container

Multi-Container Compose Fleet

Hermetic containerized stack packaging n8n, Redis, PostgreSQL, and FastAPI inside private company infrastructure.

Executive Comms

Slack Alerting

BlockKit Interactive Messages

Real-time dispatch notifying account executives of high-priority enterprise leads and billing anomalies.

Async Task Queue

Celery Workers

Distributed Workers · Retry Logic

Executes heavy background batch reconciliation jobs and scheduled daily revenue reporting workflows.

Backend Language

Python 3.11

AsyncIO · Pydantic v2 · HMAC

Underlying runtime executing custom n8n function nodes, webhook validation, and database migrations.

TS
Type Safety

TypeScript

Strict Mode · Shared Schemas

Guarantees contract parity across Next.js dashboard components and n8n webhook data models.

Host Server

Ubuntu Linux

Air-Gapped VPS · UFW Hardened

Dedicated enterprise host operating with strict firewall rules and zero third-party cloud data leakage.

04 / Production Blueprint

Verified Production Topology Blueprint

The Dakeek multi-service workflow topology — FastAPI edge dispatcher, n8n autonomous DAG cluster, Redis idempotency queues, PostgreSQL state ledger, and automated Slack alerting.

Dakeek RevOps Automation — Production Topology Blueprint
Click to Zoom & Pan Full Blueprint
05 / Developer Experience

Interactive Code Workbench

ops.dakeek.com · 200 OK
import hmac
import hashlib
from fastapi import FastAPI, Header, HTTPException

app = FastAPI()

@app.post("/api/v1/webhook/ingress")
async def secure_webhook_ingress(
    payload: dict,
    x_dakeek_signature: str = Header(...)
):
    """Enforce cryptographic HMAC signature & idempotency key."""
    expected_sig = hmac.new(
        b"dakeek_secret_key",
        payload["raw_body"].encode(),
        hashlib.sha256
    ).hexdigest()
    
    if not hmac.compare_digest(x_dakeek_signature, expected_sig):
        raise HTTPException(status_code=403, detail="Invalid HMAC Signature")
        
    # Queue to Redis for n8n cluster execution
    return {"status": "QUEUED_FOR_N8N", "pipeline": "revops_crm_sync"}
Operational Savings

$35,900 / year

Zero per-task SaaS markup vs. commercial tools

Active Workflow Fleet

36 Production DAGs

Automated billing, lead triage, and CRM sync

Reliability Guarantee

0.00% Packet Drop

Dead-letter queues with exponential backoff

06 / Execution Flow

10-Step End-to-End Request Journey

Click any step to trace the journey of an automated revenue transaction — from CRM webhook ingress through cryptographic idempotency verification, AI lead scoring, database sync, and executive alerting:

STEP 01Inbound Hook

CRM Inbound Webhook Event

HubSpot / Stripe dispatches webhook event to Dakeek edge gateway over encrypted TLS 1.3.

STEP 02HMAC SHA-256

Cryptographic HMAC Auth

FastAPI gateway computes SHA-256 HMAC signature against shared secret to reject spoofed payloads.

STEP 03Atomic Lua

Redis Idempotency Verification

Atomic Lua script verifies unique idempotency key to prevent accidental duplicate invoices or tasks.

STEP 04n8n DAG Cluster

n8n DAG Pipeline Routing

Self-hosted n8n cluster assigns the task to one of 36 production DAG workflows based on event headers.

STEP 05GPT-4o Scoring

AI Entity Triage (<300ms)

OpenAI GPT-4o extracts intent, budget ranges, and company revenue brackets in under 300ms.

STEP 06PostgreSQL 15

PostgreSQL Database Upsert

Enriched enterprise lead persisted into local PostgreSQL instance with foreign keys and audit history.

STEP 07Stripe Billing

Automated Invoice Generation

Finance workflow compiles PDF invoice and triggers Stripe billing draft with zero manual data entry.

STEP 08Bi-Directional

Multi-Service Cloud Sync

Simultaneous bi-directional synchronization across Airtable, Notion, and internal executive boards.

STEP 09Slack Webhook

Slack Executive Notification

High-value deals broadcast rich interactive Slack cards with one-click approval buttons.

STEP 10Dead-Letter Queue

Dead-Letter Protection & Ack

Transient endpoint failures diverted into automated exponential backoff queues; HTTP 200 returned.

PRODUCTION ORCHESTRATION READY
Self-Hosted n8n + Redis Cluster

Ready to automate operations and eliminate recurring SaaS costs?

We design and deploy self-hosted n8n workflow clusters, idempotent webhook engines, and AI lead scoring pipelines tailored to your enterprise stack.

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