Experto WhatsApp Cloud API: Embedded Signup + Coexistencia + migración de números

@softwarelinkerrs

As an experienced software developer and integrations expert, I offer the perfect combination of skills for your WhatsApp Cloud API project. With deep knowledge in Python, including fastAPI, and proficiency in Graph API v21, I can easily navigate and manipulate the APIs to deliver a seamless integration experience for you. Having worked on numerous projects involving Cloud API integrations from end-to-end (not just message sending), I have firsthand experience implementing Embedded Signup, Coexistence, and Number Migration functionalities. Specifically, I've created mechanisms that allow clients to connect their own WhatsApp accounts in one click without any intervention from us, just as you're looking for. One of my recent projects involved helping clients preserve their existing WhatsApp Business apps on their mobile phones while simultaneously leveraging the Cloud API functions. Through an efficient onboarding approach using QR codes, we were able to synchronize messages and ensure a smooth transition. Moreover, my proficiency in **Meta App Review** ensures I am well-versed in aspects of business verification, advanced permissions, and addressing compliance requirements - crucial elements for your project's success.

@codefusion53

Hi, I have extensive experience working with WhatsApp Cloud API, especially in SaaS platforms that involve backend development with Python and FastAPI. I’ve successfully implemented embedded signup flows that enable clients to connect their WhatsApp accounts in a single click, without manual account handling. Additionally, I’ve handled coexistence setups where clients keep their personal WhatsApp Business app on their phones while using the Cloud API simultaneously on the same number, ensuring message synchronization without conflicts. I have also migrated numbers between different BSP or accounts while preserving chat history, which involved careful verification and registration steps. My approach includes thorough testing and clear documentation, plus managing the Meta App Review process. I can provide screencasts of previous projects demonstrating these functionalities. I am confident I can help you complete your integration smoothly and efficiently. Best, Justin

@demivision

Hi there, We appreciate the clarity and detail in your project description—this is exactly the kind of integration challenge Demivision LLC thrives on. We are a specialized team with deep expertise in Python/FastAPI, SaaS architectures, and, crucially, in advanced integrations with the WhatsApp Business Platform as both Tech Providers and BSP partners. Your requirements—advanced onboarding (Embedded Signup), coexistence for WhatsApp numbers, and seamless number migration—are complex but familiar territory for us. We have successfully implemented Embedded Signup for multi-tenant SaaS platforms, enabling clients to connect their own WhatsApp numbers in a fully self-serve, compliant flow. In recent projects, we led the App Review process (covering permissions like `whatsapp_business_management` and `business_management`) and delivered screencasts and documentation tailored for Meta’s compliance team. Regarding coexistence and migration: our team has managed number migrations between BSPs for clients in LATAM, ensuring retention of chat histories and smooth re-verification. We are up to date with Meta’s evolving coexistence feature set and can confirm its current availability for Chilean numbers (happy to expand in our response). We also understand the critical importance of end-to-end testing with real numbers, ensuring that both the Cloud API and WhatsApp Business app remain operational and in sync. We propose a milestone-based approach as you suggest: (1) Tech Provider conversion + App Review, (2) Embedded Signup, and (3) Coexistence and migration validation. We will provide clear documentation, code contributions, and video walkthroughs for each phase. Let’s discuss how we can tailor our proven process to your exact stack and business needs. Looking forward to your feedback!

@carlosd178

Hola, Como resultado de una revisión detallada de los requisitos de su proyecto, entiendo completamente el alcance y las expectativas. Tengo experiencia manejando integraciones similares con WhatsApp Cloud API, Meta App Review, Embedded Signup y plataformas SaaS multi-tenant, y estoy disponible para comenzar ahora mismo. Cuento con sólida experiencia en Python, FastAPI, API Graph, Software Architecture, CRM, SaaS, Cloud Computing y WhatsApp Business Platform. Uno de los puntos clave aquí es completar la capa de onboarding self-serve sin afectar lo que ya tienen funcionando: webhook, envío/recepción, números activos y backend actual. He trabajado en flujos donde el cliente conecta su WABA desde el panel, se gestionan permisos avanzados, tokens, callback URLs, webhooks y validaciones para operación multi-tenant. Sobre migración, puedo revisar el caso según origen del número/BSP y dejar el proceso documentado para registrar, verificar y probar el número correctamente. Sobre coexistencia en Chile: no la afirmaría a ciegas sin validarla en el flujo real de Meta, porque depende de disponibilidad, elegibilidad del negocio/app y país. Lo confirmaría al inicio con un número chileno de prueba. Propongo trabajar por hitos: 1. Tech Provider + App Review. 2. Embedded Signup funcionando. 3. Coexistencia/migración probada con número real. Me gustaría conversar los detalles y puedo comenzar de inmediato. Saludos cordiales, Carlos.

@jordanrafael7

Hello. I see you need a specialist to handle WhatsApp Cloud API embedded signup, number coexistence, and migration workflows for your platform. I have hands-on experience with API integration using both PHP and Python, which directly supports building and maintaining WhatsApp Business Platform endpoints. My work with CRM systems has involved connecting third-party APIs, managing authentication flows, and ensuring reliable data sync between platforms. I've built custom API wrappers in PHP and Python to handle webhook delivery, error handling, and retry logic for messaging services similar to WhatsApp's Cloud API structure. Here's how I'd approach this: - Set up embedded signup flow with proper OAuth handling and token management for seamless onboarding - Implement number coexistence logic to ensure smooth transitions without service interruptions during migration - Build robust webhook listeners with error handling and retry mechanisms to maintain message delivery reliability Are you planning to migrate all numbers at once, or will this be a phased rollout requiring parallel operation of old and new systems? I'm ready to start immediately and can discuss implementation details through Freelancer messages to ensure the integration meets your platform's specific requirements. Best regards, Jordan Rafael G.

@johnedwardl

Hi, I will integrate your SaaS platform with the WhatsApp Business Platform, focusing on the necessary self-serve onboarding and number migration functionalities. With extensive experience as a Tech Provider, I have successfully implemented similar integrations, including Embedded Signup and coexistence features. My approach involves completing the Tech Provider verification, facilitating advanced app review permissions, and ensuring seamless coexistence for clients while preserving their existing WhatsApp Business accounts. I have handled the migration of numbers between BSPs, ensuring chat history remains intact. To confirm the coexistence status in Chile, I will investigate current compliance and operational capabilities. My previous projects demonstrate a track record of delivering results efficiently. Please provide access to the Meta app and the necessary repository, and we can discuss the estimated timeline and payment structure based on milestones. Thank you.