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Job Title Build a Scalable n8n & AI Automation Ecosystem (Supabase + OpenAI + Wati) - Phased Project Project Overview We are looking for an expert Automation & AI Engineer to build a scalable, production-grade lead management and AI-driven conversational sales system. The system will ingest leads from 5 major ad networks, store them securely, initiate an intelligent WhatsApp AI Agent for qualification, and support seamless human handoff. Important Note: We have a strict zero-tolerance policy for data loss or race conditions. This project will be executed in two clear milestones. We will fully test and stabilize the system using ONE platform first before expanding to the rest. Technical Specifications 1. Database & Schema (Supabase) Primary DB: Supabase or PostgreSQL (Google Sheets will NOT be used as the primary database). Table Schema: [id (UUID), created_at (Timestamp), lead_source (Text), full_name (Text), phone_number (Text), email (Text), target_course (Text), job_title (Text), company_name (Text), lead_status (Enum), ai_suspended (Boolean, default: false)] Lead Status ENUM: Must strictly be: [Pending, Unresponsive, Info_Confirmed, Sales_Route, Closed_Won, Closed_Lost]. 2. Core Logic & Guardrails (n8n & OpenAI) AI API: OpenAI Chat Completions API (Do NOT use Assistants API). The Gatekeeper Logic: The absolute first node after the WhatsApp inbound webhook must check if ai_suspended == true or lead_status == 'Sales_Route'. If true, the n8n execution thread must terminate instantly to prevent the AI from interfering with human agents. Sequential Message Debouncing: Implement a 5-10 second debounce logic in n8n to aggregate consecutive messages from the same user into a single prompt for OpenAI. Automated Timeout Cron: Set up an hourly Cron node in n8n to check for leads stuck in the Pending state for more than 24 hours (with no replies) and bulk-update their status to Unresponsive. Data Mirroring: n8n must sync database updates to a Master Google Sheet solely for the sales team's visual tracking and color-coding. Project Execution & Milestones [Milestone 1] - Core Engine & Meta Ads Validation (50% of Budget) You will build the entire database infrastructure, core AI logic, WhatsApp integrations, and security guardrails, but connect it ONLY to Meta Ads (Facebook/Instagram Lead Forms) for initial deployment and debugging. Deliverables for Milestone 1: Fully functional n8n JSON workflow blueprint. Live test proving: Meta Lead Ingestion ➔ Supabase Write ➔ WhatsApp Message Delivered in under 15 seconds. Live proof of the Gatekeeper logic (AI instantly stops responding when ai_suspended is flipped to true). Proof of the Cron-based Unresponsive state update. [Milestone 2] - Multi-Platform Expansion (50% of Budget) Once Milestone 1 is verified as 100% bug-free and stable, you will replicate the webhook ingestion logic to feed the remaining 4 platforms into the exact same core engine: Google Ads Lead Forms TikTok Ads Lead Generation Snapchat Lead Ads LinkedIn Lead Gen Forms Out of Scope (Deferred to Future Project) Automated lead distribution/routing to specific human sales agents. Sales agent performance tracking or commission analytics. Required Skills Advanced expertise in n8n (workflows, conditional logic, HTTP nodes). Strong experience with Supabase / PostgreSQL relational databases. Deep understanding of OpenAI API (Chat Completions, System Prompts, Token Trimming). Hands-on experience with Wati API (WhatsApp Business API). How to Apply: Please share a brief description or a short video (e.g., Loom) of a production-grade n8n + AI project you have built. Generic, AI-generated copy-paste proposals will be rejected immediately.
Project ID: 40547963
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95 freelancers are bidding on average $145 USD for this job

With extensive experience in automation and AI systems, I understand the need to build a scalable n8n & AI ecosystem for lead management and conversational sales. My past projects in integrating AI technologies align perfectly with your requirements. How do you envision the integration of Wati for efficient human handoff in this system? Regards, Yogesh Kumar
$150 USD in 6 days
8.4
8.4

⭐⭐⭐⭐⭐ Build a Scalable n8n & AI Automation Ecosystem for Your Business ❇️ Hi My Friend, I hope you are doing well. I've reviewed your project requirements and see you are looking for an expert Automation & AI Engineer. You don't need to search any further; Zohaib is here to help you! My team has successfully completed 50+ similar projects in building scalable automation systems. I will create a robust lead management and AI-driven sales system that meets all your specifications while ensuring data integrity. ➡️ Why Me? I can easily build your scalable n8n and AI automation ecosystem as I have 5 years of experience in automation workflows, database management, and API integrations. My strong grip on Supabase, OpenAI, and WhatsApp Business API will ensure a seamless execution of your project. ➡️ Let's have a quick chat to discuss your project in detail. I can share samples of my previous work, showcasing my expertise in creating efficient automation systems. I look forward to discussing this with you! ➡️ Skills & Experience: ✅ n8n Workflows ✅ Supabase Database Management ✅ OpenAI API Integration ✅ WhatsApp Business API ✅ PostgreSQL ✅ Automation Logic ✅ Data Security ✅ Lead Management ✅ API Development ✅ Message Debouncing ✅ Cron Jobs ✅ System Testing Waiting for your response! Best Regards, Zohaib
$150 USD in 2 days
7.9
7.9

Hi There!!! ★★★★ (Production-grade n8n AI automation with zero data loss & race-condition protection) ★★★★ I’ve carefully read your phased project and understand the priority is building a stable AI sales automation ecosystem with n8n, Supabase, OpenAI Chat Completions, and Wati. The first milestone focuses on a rock-solid Meta Ads workflow before scaling to other lead sources. ⚜ n8n workflow development ⚜ Supabase/PostgreSQL setup ⚜ OpenAI Chat API integration ⚜ Wati WhatsApp automation ⚜ Race-condition protection ⚜ Google Sheets mirroring ⚜ Deployment & documentation I have experience building AI automation pipelines using n8n, OpenAI APIs, PostgreSQL, webhooks, and WhatsApp integrations. My approach emphasizes modular workflows, Gatekeeper logic, debounce handling, Cron automation, and reliable error recovery for production stability. I can also share details of a similar automation project during our discussion. I’d be happy to discuss the milestones and start imediately. Warm Regards, Farhin B.
$140 USD in 7 days
6.7
6.7

As an experienced Full Stack Developer with a passion for building high-performance applications, I am ideally suited to tackle your AI-led Sales Automation Ecosystem project. I have an extensive background in PHP and Laravel as well as a deep knowledge of databases like Supabase, PostgreSQL - all of which are crucial to the success of this project. Over the years, I have successfully built robust backend systems, intricate CRMs, hosted and deployed the same, and maintained them without no data loss or race conditions. As a result, I am extremely sensitive to your need for security and stability and assure you top quality delivery even under tight timelines. At last; "Reliable post launch support and maintenance" is one of my focal points - thus in line with Milestone 1 & 2 requirements I strongly commit to bug-free stable course 실행 before moving on to next stage. My clarity driven approach compliments documentation’s significance allowing us to focus better on strategizing rather than troubleshooting. Waiting for a chance where we can create an ecosystem where automation meets necessity!
$30 USD in 1 day
6.1
6.1

Warm greetings! I specialize in n8n automation, Supabase/PostgreSQL architecture, OpenAI API workflows, and WhatsApp (Wati) AI agent systems. With over 9 years of experience, I build production-grade, failure-safe automation ecosystems designed for high-volume lead ingestion and zero data loss. Here's how I can help: * Build Supabase schema + strict ENUM guardrails with reliable write-safe n8n workflows * Design OpenAI Chat Completions pipeline with debounce, token control, and gatekeeper logic * Implement Wati WhatsApp integration with instant lead response + 15s SLA performance * Create Milestone 1 Meta-only ingestion pipeline + full testing, logs, and workflow export Before starting, can you confirm expected daily lead volume and whether Supabase is already provisioned or needs setup from scratch?
$140 USD in 7 days
6.0
6.0

Hi, I've built production n8n workflows with Supabase, OpenAI Chat Completions, and webhook-based lead ingestion — gatekeeper logic, debounce patterns, and cron-based status updates included. This is a stack I've debugged in production, not just read about. For Milestone 1 (Meta → Supabase → WhatsApp): Facebook Lead Ads trigger → Supabase upsert (UUID, ENUM status, ai_suspended flag) < 15 seconds Inbound WhatsApp: first node checks ai_suspended == true OR lead_status == 'Sales_Route' → instant thread termination 5–10s debounce via Set + Wait nodes to aggregate rapid messages before OpenAI Chat Completions call Hourly Cron: bulk UPDATE Pending leads with no activity > 24h → Unresponsive Google Sheets mirror via HTTP node for sales team tracking Milestone 2: Replicate webhook ingestion only for Google Ads, TikTok, Snapchat, LinkedIn — zero changes to core AI/gatekeeper logic. Deliverables: n8n JSON export, live recording of Meta ingestion → Supabase → WhatsApp timing, and Gatekeeper flip demo. Happy to share a Loom of a comparable workflow before we start. What's your target go-live for Milestone 1? Best regards, Farhan Quasimi
$140 USD in 7 days
6.1
6.1

Hi, What caught my attention is your emphasis on zero data loss and race-condition prevention. The Gatekeeper check, message debouncing, and phased rollout aren't just features—they're what will determine whether the automation is reliable in production. I'd build the workflow around Supabase as the single source of truth, with n8n handling lead ingestion, OpenAI Chat Completions, Wati integration, and strict guardrails before any AI response is generated. The first inbound webhook will immediately validate `ai_suspended` and `lead_status`, implement a debounce layer to merge consecutive WhatsApp messages, and use scheduled Cron workflows for timeout handling while mirroring updates to Google Sheets without making it the primary database. Starting with Meta Lead Ads before expanding to Google, TikTok, Snapchat, and LinkedIn is the right approach, as it allows the core engine to be fully validated before scaling. I can also walk you through similar AI automation workflows and discuss the architecture in detail during our conversation. Waqas Ahmed
$200 USD in 7 days
6.1
6.1

A lead system like this only works when the database becomes the single source of truth and n8n is treated as a controlled execution engine, not a loose automation layer. The gatekeeper logic you described is exactly where most builds fail, so isolating execution based on `ai_suspended` and `Sales_Route` needs to sit as a hard stop before any AI call is made. A phased rollout starting with a single Meta ingestion stream before expanding to Google, TikTok, Snapchat, and LinkedIn is the right way to eliminate race conditions and silent data drift. The core can be structured cleanly in n8n with Supabase acting as the state layer and OpenAI handling only controlled Chat Completions prompts. What volume of daily leads are you expecting in Milestone 1 so we can size debounce, queue handling, and WhatsApp throughput correctly? Best regards, Fizza Nadeem K
$70 USD in 4 days
5.9
5.9

Hello, I have experience building production-grade n8n automation platforms integrating OpenAI, Supabase/PostgreSQL, WhatsApp APIs, and multi-channel lead generation. I can implement a scalable architecture with strict guardrails, race-condition prevention, message debouncing, status-driven workflows, cron automation, and reliable data synchronization between Supabase and Google Sheets. The solution will use OpenAI Chat Completions, Wati integration, modular n8n workflows, and a phased rollout starting with Meta Lead Ads before expanding to Google, TikTok, Snapchat, and LinkedIn. I'll deliver clean, documented workflows, robust error handling, comprehensive testing, and a maintainable architecture ready for production. I look forward to discussing your workflow and implementation strategy. Best regards
$840 USD in 10 days
5.2
5.2

Hello, Problem: Sales teams often struggle with disconnected systems, manual lead management, delayed follow-ups, inconsistent CRM updates, and repetitive tasks, reducing productivity and conversion rates. Solution: I can build a complete AI-driven automation ecosystem using n8n with lead capture, CRM synchronization, AI-powered email and WhatsApp automation, workflow orchestration, API integrations, intelligent routing, reporting, and error handling. My experience includes n8n, Node.js, REST APIs, OpenAI integration, CRM automation, webhooks, and business process automation. Production n8n deployments commonly integrate AI services, CRMs, APIs, and automated workflows to streamline end-to-end sales processes. Result: You will receive a secure, scalable automation platform that reduces manual work, accelerates lead response times, improves sales efficiency, and provides a solid foundation for future AI enhancements. A few questions: • Which CRM and communication platforms should the workflows integrate with, such as HubSpot, GoHighLevel, Salesforce, WhatsApp, or Slack? • Which AI capabilities are required, such as lead qualification, email generation, meeting scheduling, or follow-up automation? • Will the solution be deployed on n8n Cloud or a self-hosted n8n instance? • Do you already have the workflow diagrams and API documentation, or should the complete automation architecture be designed as part of the project? Thanks
$98 USD in 7 days
5.6
5.6

What strategies do you envision for managing lead qualification efficiently with WhatsApp? Implementing a robust Debounce logic in n8n can seamlessly aggregate messages while ensuring quick responses through OpenAI. With substantial experience in setting up scalable n8n workflows, I have successfully integrated Supabase for data handling and built AI-driven solutions in previous projects. My focus on strict adherence to security and non-interference with human agents aligns with your zero-tolerance policy. I will create a reliable core engine for Meta Ads first, followed by a phased rollout, ensuring all systems are stabilizing before scaling. A live demonstration of features such as the Gatekeeper logic and automated statuses will be provided in Milestone 1. I am excited to contribute my expertise to build this automated ecosystem. Let’s discuss how we can drive this project forward!
$100 USD in 3 days
5.0
5.0

This looks like a great fit, We will build your n8n automation ecosystem: Supabase schema, Gatekeeper node, debounce logic, Cron timeout, and Wati integration, starting with Meta Ads for Milestone 1. For debouncing, we will use a wait node paired with a Supabase buffer table to aggregate messages per phone number before calling OpenAI. This avoids race conditions on concurrent inbound hits. A couple of quick things to confirm: 1) Do you already have a Wati account with an approved WhatsApp number? 2) Are Meta Lead Forms currently live, or do those need setup too? The number quoted here is a starting estimate. The exact cost and timeline will be confirmed after we go through the full scope together. Send me a message and we can go over the details. Best regards, Faizan
$90 USD in 5 days
5.3
5.3

A production system is only as good as its reliability, and that is exactly what I focus on. I have more than 3 years of experience building production grade n8n workflows, AI agents, Supabase integrations, and WhatsApp automations. I can build a scalable, secure, and well documented system with proper error handling and zero data loss.
$120 USD in 3 days
5.1
5.1

I can build your scalable n8n and AI automation ecosystem with Supabase, OpenAI, and Wati, including secure lead ingestion, WhatsApp AI qualification, guardrail logic, multi platform integrations, and a production ready workflow architecture. The system will be built to be easy for you to manage while ensuring reliable, and real-time automation. Regards, Shawana
$100 USD in 6 days
4.8
4.8

Hi, Aashiq (Ash) here from Cape Town, South Africa. This project instantly caught my eye, so I had to reach out. I see you're looking for an expert to build a scalable n8n & AI Automation Ecosystem integrating Supabase, OpenAI, and Wati with a focus on lead management and conversational sales systems. My experience in helping businesses increase sales through high-converting websites and AI-driven strategies aligns perfectly with your project objectives. I am confident in delivering the results you desire. Feel free to request samples of successful projects I have completed. Based on what you mentioned, here is how we would approach the project: - Develop a robust database structure using Supabase - Implement intelligent logic using n8n & OpenAI - Ensure seamless integration with WhatsApp via Wati API - Prioritize data security and zero data loss Rest assured, I will ensure clear communication and deliver a seamless, user-focused solution optimized for performance. Best Regards, Aashiq
$150 USD in 7 days
4.7
4.7

Hi, this system needs a race-condition-safe lead engine where Supabase is the source of truth and n8n only acts after strict status checks. The Gatekeeper rule, 5–10 second WhatsApp debouncing, hourly Pending-to-Unresponsive cron, and Meta-only first milestone show you are rightly treating stability before multi-platform scale. I can build the Supabase schema, n8n JSON workflows, Wati messaging flow, OpenAI Chat Completions logic, Google Sheet mirror, and live tests for Meta ingestion, WhatsApp delivery, AI suspension, and timeout updates before expanding to Google, TikTok, Snapchat, and LinkedIn. I have 7+ years across automation, n8n, web systems, and workflow builds, and can share a relevant production automation walkthrough in chat. Should the OpenAI prompt qualification logic follow a script you already have, or should I design the first qualification flow from your course and sales criteria? Best regards, Muhamad Saad K
$70 USD in 4 days
4.9
4.9

Hi there! You are building a phased AI automation ecosystem, and the real challenge is guaranteeing zero data loss and race free execution while keeping AI and human conversations completely separated through reliable guardrails. I recently built an n8n automation platform that connected Meta Lead Ads, Supabase, OpenAI, and WhatsApp, processing thousands of leads with reliable webhook handling, message debouncing, and database synchronization. The workflow was designed for production with strong validation, auditability, and scalable architecture. I will build the core engine around Supabase and n8n, implement the Gatekeeper logic, sequential message debouncing, Cron based status updates, and secure OpenAI Chat Completions integration, then validate everything with Meta before expanding to the remaining lead sources. Check our work: https://www.freelancer.com/u/ayesha86664 Will every platform use the same normalized lead schema and qualification prompt, or do you expect source specific AI behavior after Milestone 2? I am ready to start - just say the word. Best Regards, Ayesha
$115 USD in 4 days
4.3
4.3

Hi, This is exactly the type of architecture where n8n + Supabase + OpenAI needs to be treated like a production event-driven system, not just a set of workflows. Here’s how I would approach your build: ✔ Build a clean Supabase/PostgreSQL schema with strict ENUM enforcement and row-level safety rules ✔ Design n8n as an event-driven pipeline with clear separation between ingestion, processing, and delivery layers ✔ Implement the Gatekeeper node as a hard execution stop (not a soft condition) to guarantee no AI interference when `ai_suspended` or `Sales_Route` is triggered ✔ Add debouncing logic using temporary state buffering (Redis or in-flow aggregation) to merge rapid W- App messages into a single OpenAI request ✔ Configure OpenAI Chat Completions with strict system prompts and token control to prevent drift and unnecessary verbosity. For Milestone 2, once the core pipeline is proven stable, extending ingestion nodes to Google, T-Tok, Snapchat, and LinkedIn becomes a replication task using the same event contract no changes to the core logic. I’ve built similar n8n-based automation systems involving W-App APIs, OpenAI-driven classification flows, and Supabase-backed state machines where reliability and idempotency were critical design constraints. I can share a short walkthrough of a comparable production workflow if needed. Looking forward to discussing the architecture in more detail. Best regards, Usama K.
$100 USD in 2 days
4.2
4.2

hello, your automation design is fragile at the gateway level where ai responses and human takeover can collide if routing is not strictly controlled. i would build the n8n core with supabase as source of truth, enforce gatekeeper blocking before any openai call, and add debounced message aggregation to avoid duplicate triggers. have you already tested wati webhook latency in your environment? hope to work with you on this!
$110 USD in 3 days
4.2
4.2

Hi, I am a full-stack AI developer with 8 years of rich experience in software development, with a background in AI automation and backend systems. I am familiar with n8n, OpenAI Chat Completions API, Supabase, PostgreSQL, WhatsApp Business API (Wati), REST API Integration, Node.js, AI Chatbot Development, Workflow Automation, and Database Design. I understand you need a production-grade AI sales automation platform with strict guardrails against race conditions and data loss. I can build a scalable n8n workflow with Supabase as the source of truth, implement the gatekeeper logic, message debouncing, cron-based automation, and a modular architecture that can be extended from Meta Ads to the remaining lead sources without changing the core engine. I'm an individual freelancer and can work on any time zone you want. Please contact me with the best time for you to have a quick chat. Looking forward to discussing more details. Thanks. Emile.
$250 USD in 7 days
3.9
3.9

Alexandria, Egypt
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