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# WhatsApp Cloud API — Tech Provider + Coexistence Setup (Embedded Signup, Self-Hosted) ## Project overview We are a UAE-based B2B trading company. Our sales team currently chats with customers using the **WhatsApp Business app** on their phones, and we want to keep it that way. Our goal is to connect those existing numbers to the **WhatsApp Cloud API using Meta's Coexistence feature**, so that the reps keep using the app exactly as they do today, while every message is also mirrored to our own self-hosted backend for logging, monitoring and (in a later phase) CRM integration. This is **not** a request to set up a BSP dashboard (Wati, Twilio, 360dialog, etc.). We are building this **directly with Meta** and want it owned by our own Meta Business account and infrastructure. You will help us become our own **Meta Tech Provider** and implement the **Embedded Signup coexistence onboarding** flow. If you have only worked through reseller dashboards and have not implemented Embedded Signup / Tech Provider onboarding yourself, this project is not a fit. ## The outcome we want (Phase 1) By the end of this engagement: 1. Our business is set up and approved as a **Meta Tech Provider** (business verification + App Review for advanced access to `whatsapp_business_messaging` and `whatsapp_business_management`). 2. A working **Embedded Signup flow with Coexistence enabled** (`featureType: whatsapp_business_app_onboarding`), either self-hosted or via Hosted Embedded Signup. 3. Our **~6 existing sales-rep numbers** (UAE, +971), currently active on the WhatsApp Business app, onboarded to the Cloud API **via coexistence — without removing them from the app.** 4. Webhooks delivering, to our self-hosted endpoint, the full message stream for each number: customer inbound messages, **`smb_message_echoes`** (messages reps send from the app), and the one-time **`history`** / **`smb_app_state_sync`** payloads on onboarding. 5. Verified ability to **send messages via the API** from each rep's number (template and, where applicable, session messages). 6. Clean documentation and a handover call so we can operate and extend it ourselves. ## Scope of work - Guide us through and configure **Meta Business verification** and the **Tech Provider** setup in the Meta App Dashboard (Partner Solution, app configuration, required permissions). - Prepare and submit the **App Review** for advanced access to the two WhatsApp permissions, including drafting the permission justifications and the screen-recording walkthroughs (we will record on our account with your script/guidance). - Implement the **Embedded Signup coexistence flow**: the launch configuration, the page/host (we have a VPS available if self-hosting is needed), capturing the returned code, and the **server-to-server token exchange** for business tokens. - Implement the **onboarding + synchronization orchestration**, respecting the **24-hour history-sync window** and the one-shot nature of the `smb_app_data` sync calls. - Configure and verify **webhook subscriptions** (`messages`, `smb_message_echoes`, `history`, `smb_app_state_sync`) delivering to our endpoint, and confirm payloads are received and parseable. - Prove the full chain on **one number in development mode first** (a paid early milestone), then roll out to the remaining numbers after App Review approval. - Provide all **source code** (Embedded Signup page, token-exchange service, any helper scripts) in a Git repository, plus written documentation of the setup, tokens/IDs, and how to onboard an additional number in future. ## What we will provide - Our **Meta Business account** and admin access; we will perform all account-bound actions (verification, App Review submission, screen recordings) ourselves with your step-by-step guidance. - A **self-hosted automation/webhook environment** (n8n) and a **Linux VPS** for hosting the Embedded Signup page if required. - The **~6 sales-rep phone numbers**, already active on the WhatsApp Business app (UAE). - Prompt responses and availability for the account-bound steps and testing. ## Required experience (must-haves) - Demonstrable, **hands-on WhatsApp Cloud API** integration experience built **directly on Meta**, not via a BSP dashboard. - Specific experience with **Embedded Signup** implementation and **Tech Provider / Solution Partner onboarding**. - Specific experience with **WhatsApp Coexistence** (Business app + Cloud API on the same number). This is the core of the project. - Experience taking an app through **Meta App Review** for `whatsapp_business_messaging` and `whatsapp_business_management` advanced access. - Solid grasp of **webhooks, the 24-hour customer service window, and template messaging**. - Comfortable with server-side code for the token exchange and webhook handling. Familiarity with **n8n** is a strong plus. - Clear written English and the ability to guide a technical client through the Meta-account steps. ## Screening questions (please answer in your proposal) Proposals that skip these or answer them generically will not be considered. 1. Briefly describe a **WhatsApp Coexistence** project you personally implemented — what was the client's situation and how did you onboard their existing app number(s)? 2. In the Embedded Signup launch configuration, **what value do you set to enable coexistence onboarding**, and on which object? 3. Which **webhook fields** must be subscribed for coexistence, and which one carries messages that a rep sends from the WhatsApp Business app? 4. After a number completes the coexistence flow, what is the **time limit to synchronize messaging history**, and what happens if you miss it? 5. Have you taken an app through **App Review** for `whatsapp_business_management` advanced access? What did Meta require you to submit? ## Phase 2 (future, separate engagement — for context) Once Phase 1 is stable, we will integrate the message stream with **Zoho CRM** (logging conversations to contact records, sending/follow-ups from within CRM, and automated daily summaries). This is mostly work on our own n8n/Zoho stack. ## Budget & engagement Fixed-price, **milestone-based**. Suggested milestones: - **M1 –** Tech Provider configured + business verification complete + App Review submitted. - **M2 –** Working coexistence flow proven end-to-end on **one number in development mode** (webhooks receiving inbound + echoes; test send working). - **M3 –** App Review **approved** (advanced access granted). - **M4 –** All ~6 numbers onboarded to coexistence in production, webhooks verified, send-from-API verified, documentation + handover delivered. Please propose your price per milestone and a realistic timeline, noting which steps depend on Meta's review queue. ## To apply Answer the five screening questions, share **links or descriptions of comparable coexistence / Embedded Signup work**, and outline your proposed approach and milestone pricing. Thank you.
Project ID: 40551030
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Hello there, I will set up your Meta Tech Provider account, build the Embedded Signup flow with `featureType: whatsapp_business_app_onboarding` on the launch configuration, and onboard all six UAE numbers to coexistence so your reps never leave the Business app. Screening answers: 1) I onboarded a multi-rep sales team (five numbers) to coexistence by running Embedded Signup with the coexistence feature type, exchanging tokens server-side, then syncing history within the 24-hour window. 2) `featureType: whatsapp_business_app_onboarding` set on the Embedded Signup launch configuration object. 3) Subscribe to `messages`, `smb_message_echoes`, `history`, and `smb_app_state_sync`. The `smb_message_echoes` field carries rep-sent messages. 4) You have 24 hours to call the history sync endpoint. Looking forward to talking through the details. Kamran
$1,685 USD in 25 days
8.0
8.0

Hi, This is Elias from Miami. I checked the details and understand you need a direct Meta-owned WhatsApp Cloud API setup with Tech Provider approval, Embedded Signup Coexistence, and webhooks mirrored to your self-hosted backend. The real challenge here is not only webhook coding, but getting App Review, coexistence onboarding, token exchange, history sync, and message echoes handled correctly. Screening answers: 1 – I’ve worked with direct WhatsApp Cloud API/Embedded Signup flows; I’d validate coexistence first on one existing app number before rolling out all reps. 2 – Coexistence is enabled with featureType: whatsapp_business_app_onboarding in the Embedded Signup launch configuration. 3 – Required fields include messages, smb_message_echoes, history, and smb_app_state_sync. smb_message_echoes carries messages sent by reps from the WhatsApp Business app. 4 – History sync must be triggered within 24 hours after onboarding; if missed, that one-time sync payload is not available again normally. 5 – App Review usually needs business verification, permission justification, screencast walkthrough, use-case explanation, data handling details, and working demo flow. I’d approach this by setting up Tech Provider/App Review first, then proving one number end-to-end, and only after approval onboarding the remaining numbers with documentation and handover. Looking forward to hearing from you.
$2,250 USD in 7 days
7.9
7.9

OKAY------Got the Scope of work------------->>Coexistence Setup for WhatsApp Cloud API I will deliver exactly what you need with high-quality, clean, and scalable solutions. I have rich expereince similar projects for my clients before. As an experienced Full Stack Developer, I am sure you'll be impressed with both my work quality and commitment. Please ping me to get started and achieve outstanding results. Thanks!!
$2,500 USD in 7 days
7.8
7.8

You are not asking for a reseller WhatsApp dashboard; you need direct Meta Tech Provider setup with Embedded Signup and Coexistence so existing sales reps keep using the WhatsApp Business app while messages mirror into your own backend. I would handle this as a controlled Meta/API implementation: verify business/app readiness, map the coexistence onboarding flow, implement webhook handling, persist message/contact events, and document the exact approval and deployment steps. For this project I would focus on: - Meta Business/App Review readiness for whatsapp_business_messaging and management access - Embedded Signup with Coexistence enabled for the existing numbers - Self-hosted webhook backend, logging, retries, monitoring, and CRM-ready data model - Clear admin/test checklist so reps can confirm app usage remains unchanged If useful, I can first map the approval/onboarding sequence and the webhook payloads we need to store before coding. Best, Dr. Syafiq
$3,000 USD in 21 days
6.6
6.6

⭐⭐⭐⭐⭐ WhatsApp Cloud API Integration & Coexistence Setup Expert ❇️ Hi My Friend, I hope you are doing well. I've reviewed your project requirements and see you are looking for a WhatsApp Cloud API Tech Provider. Look no further; Zohaib is here to assist you! My team has successfully completed 50+ similar projects for WhatsApp integrations. I will ensure your existing numbers are connected to the Cloud API while keeping your current setup intact. ➡️ Why Me? I can easily do your WhatsApp Cloud API setup as I have 5 years of experience in API integration, specifically with WhatsApp. My expertise includes business verification, webhook configuration, and message synchronization. Additionally, I have a strong grip on server-side coding for token exchanges and can guide you through the entire process. ➡️ Let's have a quick chat to discuss your project in detail and let me show you samples of my previous work. Looking forward to discussing with you! ➡️ Skills & Experience: ✅ WhatsApp Cloud API Integration ✅ Embedded Signup Implementation ✅ Meta Business Verification ✅ Webhook Configuration ✅ Message Synchronization ✅ App Review Process ✅ Server-Side Coding ✅ API Documentation ✅ n8n Automation ✅ Problem Solving ✅ Client Guidance ✅ Technical Support Waiting for your response! Best Regards, Zohaib
$1,800 USD in 2 days
6.6
6.6

As an accomplished software development company with a wealth of experience in API Development and Linux, especially since my last project involved LinkedIn API integration, I am confident I am the perfect fit for your needs. At Web Crest, we don't just develop applications - we develop solutions to real-world problems. Your focus on implementing Meta Tech Provider and Embedded Signup coexistence setup aligns perfectly with what we bring to the table. We have set up numerous complete systems from scratch and this situation is no different. Crucially, I understand that 'the devil is in the details'. Following your precise scope of work, I will meticulously guide and configure your Meta Business account & admin access, submit the App Review with top-notch justifications while providing effective screen-recording walkthroughs. Being proficient in Node.js, Python and experienced in REST APIs development & GraphQL which also encompasses delivering webhook subscriptions — `messages`, `smb_message_echoes`, `history`, `smb_app_state_sync' to a self-hosted endpoint can guarantee swift integration of your system.
$2,000 USD in 7 days
5.4
5.4

Good evening! I'll guide you through the full Meta Tech Provider setup including business verification, App Review submissions for whatsapp_business_messaging and whatsapp_business_management, and the Embedded Signup coexistence flow with featureType: whatsapp_business_app_onboarding, then onboard all six UAE numbers to the Cloud API without removing them from the WhatsApp Business app, configure webhooks to capture inbound messages, smb_message_echoes, and the one-shot history sync payloads on your self-hosted VPS endpoint. Any specific deadline I should work around?
$2,200 USD in 21 days
5.7
5.7

Hi I can implement WhatsApp Cloud API coexistence with Embedded Signup as your self hosted integration, built directly on Meta workflows and owned by your Meta Business infrastructure, not via a BSP dashboard. My approach is: Tech Provider onboarding in Meta App Dashboard, Meta Business verification and App Review for whatsapp_business_messaging and whatsapp_business_management, then Embedded Signup launch with the coexistence flag to enable onboarding where the WhatsApp Business app remains active. I will build the server side token exchange service, the Embedded Signup page endpoint, and the webhook receiver that validates signatures and persists payloads for inbound messages plus smb_message_echoes and the smb_app_state_sync and history one shot sync events. I will prove the chain on 1 development number first, including template and session sending from the API, then expand to all ~6 numbers after App Review approval. Deliverables include a Git repository with source code, n8n friendly webhook setup, environment templates, and a step by step runbook with what to record for screen recordings and how to onboard additional numbers later. Best, Justin
$2,250 USD in 7 days
5.3
5.3

Greetings, I'm a full stack developer with 10+ years of experience, with direct, hands-on work building WhatsApp Cloud API integrations on Meta's own infrastructure — not through BSP dashboards like Wati or Twilio. I've implemented Embedded Signup, Tech Provider onboarding, and Coexistence flows exactly like the one you're describing. Why work with me? ★ Proven track record: 75 successful projects with 5-star reviews ★ Expertise in Node.js, Angular, React, Express, Python, Django, Flask, PHP, WordPress, Laravel, Codeigniter and more — plus n8n for the webhook/automation side you're already running ★ Responsive, deadline-focused, and committed to results ★ 3 months of free post-launch support I'm comfortable with the milestone structure you proposed (M1–M4) and can give you a price per milestone once we talk through the current state of your Meta Business account and number(s). Let's schedule a quick chat to discuss timelines, the App Review queue, and launch goals. I'm confident I can bring your vision to life. Best regards, Samar H.
$1,750 USD in 30 days
4.9
4.9

With over a decade of experience in web development and a strong background in API development and integration, I am the ideal freelancer to help you achieve your goals with the WhatsApp Cloud API and Meta's Coexistence feature. My expertise in building scalable backend systems and well-structured APIs aligns perfectly with your project's needs. Not only can I guide you through the Meta Business verification and Tech Provider setup, but I can also steer you through the App Review process with ease. Additionally, my extensive experience with SaaS platforms and subscription-based services can prove invaluable for the second phase of your project, which involves logging, monitoring, and CRM integration. From complex web systems to marketplaces and booking systems, I have successfully delivered various applications that underscore growth-focused digital products - exactly what your project requires. In essence, no matter how intricate or manifold the different parts of this engagement are, I'm confident that my skill-set encompasses them all. Lastly, truly understanding the significance of a seamless handoff after project completion; I commit to providing clean documentation and source code upon project completion whilst ensuring that you have a full grasp on its function and how to build upon it for future system expansion. I'm excited about the opportunity to help unleash the full potential of WhatsApp Cloud API for your business.
$3,000 USD in 7 days
5.0
5.0

Hi there, We will set up your Meta Tech Provider account, implement the Embedded Signup coexistence flow, and onboard all six UAE numbers to the Cloud API while keeping the Business app fully active. To your screening questions: 1) We onboarded a sales team's existing numbers via coexistence, mirroring all traffic to a self-hosted backend without disrupting daily app usage. 2) You set `featureType: whatsapp_business_app_onboarding` on the launch configuration object. 3) Subscribe to `messages`, `smb_message_echoes`, `history`, and `smb_app_state_sync`. The `smb_message_echoes` field carries rep-sent messages. 4) You have 24 hours to sync history. Miss it and the payload is lost permanently. 5) Yes. Meta required permission justifications, a screen recording walkthrough of the integration, and a privacy policy URL. Looking forward to your response. Best regards, Faizan
$1,676 USD in 25 days
4.7
4.7

As an accomplished web and mobile app developer with a strong background in CRM solutions - and customization - my experience aligns impeccably with your project requirements. With over 14 years of experience and more than 400+ projects under my belt, I can confidently affirm my ability to provide full-stack development encompassing the Meta setup and Embedded Signup needed for your Coexistence venture. I'm also well-versed in API integration, Linux, MySQL, and overall system administration. Notably, I have successfully integrated several third-party solutions into business systems: an expertise that qualifies me for this project. This ensures that your existing sales team can continue using WhatsApp Business app as they do now but with added functionalities achieved through WhatsApp Cloud API. My focus will be to establish a seamless and robust coexistence set up between Meta's infrastructure and your self-hosted backend. When you choose me for this project, you're not just acquiring top-notch technical skills; you're also gaining a committed partner dedicated to delivering customer satisfaction at every stage of the project. I believe our collaboration will lay the groundwork for a solid technical infrastructure that facilitates smooth logging, monitoring, and future CRM integration – just as you envision it! Let's get started on advancing your sales communication framework while maintaining user-familiarity with WhatsApp!
$1,700 USD in 15 days
4.6
4.6

Hi there, I’d be happy to discuss your project—feel free to start a chat anytime. I’m a full-stack developer with solid experience building scalable web and desktop applications, and I’m confident I can deliver your project efficiently and on time. I also have strong exposure to modern technologies including Web3 concepts, DevOps practices, and automation. I’m a Kubernetes enthusiast with hands-on experience using Docker containers and deploying applications on Linux servers. My expertise includes: MERN / MEAN Stack (development + team management) .NET Core APIs with Angular, including D3.js data visualizations Azure Logic Apps, SharePoint, and workflow automation (PowerApps familiarity) Salesforce development with Apex, Visualforce, and integrations via .NET APIs DevOps basics, containerization, and application hosting on Linux Automation workflows and AI-based tools to improve efficiency I bring a problem-solving mindset and full project lifecycle experience—from development to deployment. Looking forward to hearing from you. Thank you!
$2,500 USD in 5 days
4.6
4.6

Hello there, Your need to enable coexistence between WhatsApp Business app and Cloud API, with seamless message mirroring to your self-hosted backend, is clearly pivotal for your UAE sales team’s workflow. I can help establish your business as a Meta Tech Provider and implement the Embedded Signup coexistence flow as required. I’ve managed integrations directly with Meta’s platform for WhatsApp Cloud API, handling advanced permissions via Meta App Review and configuring webhook subscriptions for inbound, echo, and history message streams. My approach: 1) Guide your Meta Business verification and prepare the App Review with detailed permissions and scripts, 2) Develop and host the Embedded Signup page with secure token exchange and orchestration of onboarding sync within the 24-hour window, 3) Validate webhook delivery and message sending on one test number before scaling to all your reps. Let's start with setting up a working coexistence flow on your first number and get your Meta app review submission ready promptly. A short call to align on your VPS environment and n8n webhook setup might help streamline progress. Could you clarify your preferred hosting approach for the Embedded Signup flow: fully self-hosted on your VPS or partially using Meta's Hosted Embedded Signup? Best regards, Anatolie
$2,000 USD in 15 days
4.3
4.3

⚠️ If you're not happy, you don’t pay. ⚠️ Hi there, Thank you for sharing the detailed project brief. I can build your project using the WhatsApp Cloud API with a premium, scalable, and performance-optimized design. I will deliver: • Setting up as a Meta Tech Provider • Implementing Embedded Signup with Coexistence • Onboarding existing sales-rep numbers to the Cloud API • Configuring webhooks and message stream delivery • Enabling the ability to send messages via the API • Comprehensive documentation and handover support You will also receive guidance, documentation, and support clarity beyond the project scope. I am confident I can execute your vision professionally and efficiently. Looking forward to discussing timeline and next steps. Best regards, Chirag.
$1,500 USD in 7 days
4.4
4.4

Hi, We can help set up WhatsApp Cloud API directly through Meta, not via Wati, Twilio, or 360dialog. We can support Tech Provider setup, App Review, Embedded Signup with coexistence, webhook configuration, token exchange, one-number testing, and rollout for all 6 UAE numbers. Key answers: Coexistence is enabled using featureType: whatsapp_business_app_onboarding in the Embedded Signup config. Required webhook fields include messages, smb_message_echoes, history, and smb_app_state_sync. Rep-sent WhatsApp Business app messages come through smb_message_echoes. History sync must be triggered within 24 hours after onboarding, otherwise the one-time sync can be missed. We can work milestone-based, provide source code, documentation, and a handover call.
$2,250 USD in 7 days
4.4
4.4

Got it, this is exactly the kind of Meta-native WhatsApp Cloud API build-up where details matter (and where copy-paste “BSP dashboard” steps usually fail). I’ll help you set up your business as a Meta Tech Provider, then implement Embedded Signup for coexistence so your reps keep using the WhatsApp Business app while every inbound, `smb_message_echoes`, and onboarding history/sync payload gets mirrored into your self-hosted logging stack. Approach: 1) Meta verification + Partner Solution configuration + App Review package for the two advanced permissions. 2) Embedded Signup coexistence onboarding (`featureType: whatsapp_business_app_onboarding`) with token exchange and launch config. 3) Orchestrate onboarding + the 24-hour history-sync window and verify webhook payloads for messages + echoes. 4) Prove the full chain on one UAE development number first, then scale to the remaining ~6 after approval. Deliverables: source in a Git repo (Embedded Signup page + token-exchange service + webhook handler), documentation, and a smooth handover to operate it yourself, no “mystery dashboard magic,” just your infrastructure doing the job.
$2,500 USD in 2 days
3.7
3.7

Hi, at your scale, WhatsApp Coexistence is about extending live sales conversations into Cloud API without disrupting the reps already working inside the WhatsApp Business app. I have implemented Embedded Signup–based coexistence onboarding for a multi-rep sales setup where existing WhatsApp Business app numbers were connected to Cloud API so conversations stayed uninterrupted while messages were mirrored to a backend, including per-number onboarding flow and token exchange orchestration. In Embedded Signup, coexistence is enabled via the featureType: whatsapp_business_app_onboarding on the launch configuration object, webhooks must subscribe to messages, smb_message_echoes, history, and smb_app_state_sync where echoes carries rep-sent messages, the history sync must be completed within the 24-hour window or full backfill is no longer possible, and App Review for whatsapp_business_messaging and whatsapp_business_management requires business verification plus a screencast and clear permission justification. I would set up the Tech Provider app structure, guide the App Review submission, implement the Embedded Signup + server-side token exchange, and validate end-to-end messaging on one number before scaling onboarding to the remaining lines after approval. For App Review, did you already prepare the product walkthrough and data handling explanation, or would you want me to script the exact recording flow for your team to submit? Best regards, Fizza Nadeem K
$1,550 USD in 10 days
3.8
3.8

Hi! I've reviewed your requirements and understand you're looking for a direct Meta-based solution rather than a BSP, while ensuring your existing WhatsApp Business numbers continue working seamlessly through the Coexistence feature. I can help you implement WhatsApp Cloud API directly through Meta, including Embedded Signup, Tech Provider onboarding, Coexistence, App Review, and webhook integration on your self-hosted infrastructure. A few questions: 1. Have you already completed Meta Business Verification, or will that be part of Phase 1? 2. Is your n8n environment already configured to receive webhooks, or should that be included in the implementation? 3. Are all six numbers under the same WhatsApp Business Account (WABA), or will they require separate onboarding? I've worked with WhatsApp Cloud API integrations, webhook handling, authentication flows, and Meta platform integrations. If we're aligned on the scope, I'd be happy to discuss the implementation approach, milestone breakdown, and a realistic timeline based on Meta's review process.
$2,250 USD in 7 days
3.9
3.9

Hi, Aashiq (Ash) here from Cape Town, South Africa. This project instantly caught my eye, so I had to reach out. I see you are looking for a professional with hands-on experience in WhatsApp Cloud API integration directly on Meta, specializing in Embedded Signup and Tech Provider onboarding. With a track record of helping businesses increase efficiency and profits through seamless technology solutions, I am confident in achieving the outcomes 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: - Guide and configure Meta Business verification and Tech Provider setup. - Implement Embedded Signup coexistence flow. - Orchestrate onboarding and synchronization processes. - Configure webhook subscriptions for seamless communication. Rest assured, I will deliver a user-focused solution optimized for performance. Clear communication and timely deliverables are my priorities. Best Regards, Aashiq
$1,500 USD in 14 days
3.1
3.1

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