WhatsApp Meta API Integration Expert Needed

@technologiesit

In today's competitive market, the success of a gym SaaS business relies on seamless and efficient communication between the platform and its users. Having worked with NestJS backend and React Native frontend, my extensive experience in full-stack web development perfectly aligns with your project requirements. I have successfully completed numerous API integrations, including a WhatsApp Meta API project similar to this one. During that project, I handled WABA setup, template approvals, and webhooks meticulously, ensuring a streamlined process from design to production. I understand the nuances of WhatsApp Meta API messages and the common reasons they fail during testing or don't get delivered. From sandbox vs prod issues to template status, opt-in errors or callback problems, my expertise in debugging will save your team valuable time and resources. Additionally, I have worked on backend-triggered WhatsApp notifications in different contexts including payment reminders and transactional messages. In these projects relevancy and timeliness were key. I ensured reliability by implementing robust retry mechanisms for failed notifications and thorough error handling system for any failure events. Harnessing these experiences together with my commitment to delivering high-quality work on schedule, makes me your ideal candidate for this essential SaaS integration task.

@NEHABHAT92

With over 9+ years of experience as a web and mobile developer, I am confident in my ability to complete and stabilize the WhatsApp Meta API integration for your gym SaaS product. My expertise extends to NestJS and React Native - the exact platforms you're using. I possess proven hands-on experience with WhatsApp Meta API integrations, having taken many projects to production. To address your first question, I recently was responsible for handling the whole Meta API setup, template approvals, and webhooks for a leading ecommerce platform . I am well-versed in troubleshooting potential issues encountered during testing or delivery such as sandbox vs prod variances, template status discrepancies, opt-in concerns, and callbacks overpowering delivery. Debugging these issues has become second nature to me. In terms of backend-triggered notifications like payment reminders or transactional messages, I have successfully ensured reliability by employing means of effective retries or handling failures appropriately.I truly understand the sensitivity and criticality of these types of notifications, hence appreciate their need to be delivered reliably and promptly. I am confident that my skill set coupled with my past experience mirror your project requirements specific to WhatsApp Meta API integration. Given an opportunity,I would bring my expertise in NestJS,React Native ,Node.js together with an expert functionality on MySQL and PHP creating reliable automated payment

@ModernTechno442

As a trusted web design and development company with over 7 years' experience, API integrations are second nature to us. We have successfully completed multiple WhatsApp Meta API integrations in the past, taking them all the way through to production. In these projects, we meticulously handled every aspect from the WABA setup and template approvals to efficient webhook implementation. Our clients always appreciate our detailed approach that ensures smooth and stable integration. Regarding Meta API message failures, we know the sandbox vs. prod environment differences inside out. We understand that issues can arise due to various reasons like unapproved templates, opt-in challenges, or subscription-related callbacks. Our troubleshooting approach is rigorous enough to leave no stone unturned when a debugging situation arises. Lastly, on your specific requirement of reliable delivery of backend-triggered notifications, we've handled various transactional messages such as payment reminders before with great success. We make sure each message goes out at the right time and handle any possible failures or retries ensuring zero disruption in service operation for your gym SaaS product. Given our expertise, we believe we are perfectly poised to complete and improve your WhatsApp Meta API integration as needed!

@DigitalNightOwl8

Hi Ashutosh B., Good afternoon! Already have something live to show you I am skilled mobile programmer with skills including SaaS, Backend Development, React Native, Node.js, API Integration, PHP, Debugging, MySQL, JavaScript and Frontend Development. Please send a message to discuss more about this project. I await your immediate response

@Dliteinformation

With Dlite Info Tech Pvt Ltd, you are guaranteed to get a freelancer with extensive proficiency in API Integration, Backend Development, MySQL, and PHP who has also completed similar tasks integrating the WhatsApp Meta API. We have a track record of successfully taking WhatsApp Meta API integrations to production. About the most common challenges faced during testing or delivery of WhatsApp Meta API messages, we are well-versed in sandbox-prod differentiation, template status management, opt-ins handling, and callbacks correlation. We are accustomed to determining failures and debugging issues in these areas. Regarding the backend-triggered notifications you require for your SaaS product, such as payment reminders or transactional messages, we have relevant experience ensuring reliability and managing retries or failures. By choosing us, you are electing to work with a team that embraces delivering results over making promises. We pride ourselves on solving issues quickly and effectively while maintaining cleanliness and reliability in our solutions. With a clear understanding of your project requirements and a shared dedication to flawless execution and on-time delivery, Dlite Info Tech is the ideal choice to finalize the remaining 10% of your project!

@arshig8

Hello, I am a highly skilled full-stack developer and digital solution architect with over 4 years of experience transforming ideas into powerful, scalable, and business-focused web and mobile applications. I specialize in building performance-driven, user-friendly products that not only look premium but also deliver measurable results. My development approach combines clean, maintainable code with modern UI/UX principles, ensuring every project is fast, secure, responsive, and optimized for real-world growth. My technical expertise includes: Frontend & Backend: PHP, Laravel, MERN Stack CMS & E-commerce: WordPress, Shopify, Magento Mobile Apps: Flutter (Android & iOS) Other Core Skills: API development, database design, payment integrations, automation, and cloud deployment From corporate websites and e-commerce systems to fully custom platforms and mobile apps, I deliver end-to-end solutions that are stable, scalable, and aligned with business goals. I work with a strategic mindset—spanning requirements analysis and system architecture through development, testing, deployment, and long-term support. My focus is always on quality, clarity, and delivering outstanding value. If you're looking for a developer who understands both technology and business and can bring your vision to life with precision, creativity, and reliability, I am here to help. Let’s build something exceptional together. Best regards, Arshi.g

@otusonellp

As an agile and innovative IT solution provider, my team at OTUSONE has expertise in key areas that align perfectly with your project requirements. When it comes to the WhatsApp Meta API integration, we've got you covered. My first-hand experience with backend technologies like NestJS and my mastery over Frontend in React Native perfectly compliment this task. Our meticulous approach to detail ensures that tasks such as fixing bugs with the APIs, optimizing templates & webhooks, and achieving reliable message delivery are accomplished seamlessly and successfully. Specifically speaking of WhatsApp Meta API ventures, we have developed a robust application before where we undertook complete WABA setup. We ensured smooth template approvals by ensuring each template met all WhatsApp guidelines, especially for app initiation message or 'HSM'. Handling webhooks efficiently was made possible by creating error tracking systems, constantly monitoring callback responses and ensuring swift troubleshooting. We've also worked extensively on backend-generated WhatsApp messages such as payment reminders or transactional notifications. And for this project; we bring in extensive experience from managing retries during high volume times, tackling failures quickly to minimize business impact and maintaining top-notch reliability levels overall. Completing this task successfully will open doors for more collaborative projects between us which I am confident you will lo

@nexvative

I can help you complete and stabilize your WhatsApp Meta API integration so payment due reminders are delivered reliably from your NestJS backend. I’ve taken multiple WhatsApp integrations from sandbox to production and am very familiar with the failure modes around templates, opt-in, and webhook handling that typically block delivery at this stage. 1) Production WhatsApp Meta API experience I’ve shipped WhatsApp Meta API integrations for transactional notifications (payment reminders, order confirmations, appointment alerts). My work included full WABA setup, phone number registration, system-user access tokens, template creation and approval, webhook verification, and message delivery monitoring. I’ve handled both Cloud API and on-prem setups, ensuring templates matched use cases exactly to avoid silent rejections. 2) Common delivery failures & debugging approach The most frequent issues I see are: Templates not in APPROVED status or mismatched variable formats Using sandbox/test numbers without proper opt-in or with expired sessions Sending template messages to users who haven’t explicitly opted in Incorrect webhook subscriptions or missing message-status callbacks Mixing test and production credentials (token, phone number ID, WABA ID)

@yogeshjoshi9

Hi Hiring Manager, I’m an experienced developer with hands-on expertise in WhatsApp Meta API integrations and a strong background in backend systems using NestJS and frontend React Native. I’ve successfully implemented WhatsApp APIs in production, handling WABA setup, template approvals, webhooks, and reliable message delivery. I’m confident in debugging sandbox vs. production issues, template errors, opt-in handling, and callback monitoring. I’ve built backend-triggered notifications, including payment reminders, with robust retry and failure-handling mechanisms. I can quickly stabilize your gym SaaS WhatsApp automation and ensure reliable delivery. I’m ready to start immediately and deliver this short-term task efficiently. Looking forward to discussing this further. Best regards, Yogesh

@chiragardeshna

Hi there, I have taken WhatsApp Meta (Cloud API) integrations to production for transactional messages. I can fix sandbox/testing issues, validate templates and webhooks, and stabilise backend delivery in NestJS. Common issues I have handled: template status mismatches, opt-in problems, sandbox vs prod limits, and webhook callback errors. Quick check: are you on Cloud API and are templates already approved or still pending?

@rajeshk721

As an accomplished frontend and full-stack developer with over 11 years of experience, I believe I'm the ideal candidate for this project. My proficiency with powerful tools like React.js, React Native, NestJS, among others will come in handy for your Gym SaaS product. Importantly, my expertise lies in seamless API integrations which include WhatsApp Meta API - a core requirement for your project. To answer the questions posed, I've taken multiple WhatsApp Meta API integrations to production. A noteworthy example is an e-commerce application where I handled WABA setup, template approvals and webhooks successfully resulting in an optimized messaging system. Moreover, I'm well-versed in backend-triggered WhatsApp notifications such as payment reminders or transactional messages to ensure reliability. I've previously handled potential failures with strategic plans for retries to ensure automated relay of important messages without any glitches.

@shailender18

Hello, I can help complete and stabilize your WhatsApp Meta API integration for automated payment reminders in your gym SaaS, focusing on fixing sandbox/testing issues, validating templates and webhooks, and ensuring reliable backend-triggered message delivery from your NestJS services. I have hands-on experience taking WhatsApp Meta API integrations to production, including WABA setup, template approvals, opt-in handling, and webhook-based delivery tracking. I’m familiar with common failure points such as template status issues, sandbox vs production mismatches, token or number configuration problems, and delivery callbacks, and I know how to debug them efficiently. I’ve also built reliable payment and transactional notification systems using queues, retries, and message status tracking to ensure consistent delivery. This fits well as a short-term task, with availability for further work after successful stabilization.

@himanshus642

As a highly experienced AI and Full-Stack Engineer, I have the skill set and previous experience with API Integration to deliver exactly what your gym SaaS product needs - a reliable, stable and fully integrated WhatsApp Meta API function for automated payment due reminders. In fact, in one of my recent projects, I took a WhatsApp Meta API integration to production successfully. This included setting up WABA, obtaining template approvals and configuring webhooks while ensuring all messages were properly initiated, delivered and received. I am well-versed with addressing any challenges that may arise throughout the process. One common reason behind Meta API message testing failures or non-delivery is sandbox vs production disparity, along with accurate template status check and user opt-in. To debug them efficiently, I focus on step-by-step meticulous monitoring through detailed analysis of callbacks. This approach has proven effective in ensuring the smooth operation of backend-triggered WhatsApp notifications even in situations of failures or retries and would significantly contribute to the success of your project. My recent projects testify to my dedication to delivering results that meet and exceed client expectations.

@usamaansari786

Hi, I’ve reviewed your requirements and understand that you need a freelancer to finalize and stabilize your WA Meta API integration for automated payment reminders in your gym SaaS product. The backend is NestJS, frontend is React js, the focus is on sandbox/testing issues, template validation, webhook setup, and reliable message delivery. I have hands-on experience taking WA Meta API integrations to production, including WABA setup, template approvals, webhook configuration, and backend-triggered transactional messaging. ➡️ 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 this with you in chat. Warm Regards, Usama

@garronwallace

I’m confident I’m the right person for this project. I understand you need to finish and stabilize your WhatsApp Meta API integration for automated payment reminders in your gym SaaS, focusing on testing, templates, and delivery issues with a NestJS backend and React Native frontend. Ensuring the system is modern, smooth, intuitive, and reliable is key. I bring hands-on experience with WhatsApp Meta API integrations, including WABA setup, template approval, webhook validation, and backend-triggered notifications. I’m new to Freelancer, but I have strong real-world experience and have completed many successful projects outside the platform. Let’s talk through your goals — I’d love to help bring this to life. Regards, Garron Levi Wallace

@ramnath18

Hello, We would be happy to assist you in completing and stabilizing the WhatsApp Meta API integration for automated payment due reminders in your Gym SaaS platform. Onprice Infotech Pvt. Ltd. is a Meta-approved WhatsApp Business Solution Provider (BSP), which allows us to implement secure, compliant, and scalable WhatsApp automation solutions as per Meta guidelines. With 12+ years of IT industry experience, our team has successfully delivered enterprise-level solutions across multiple domains. We specialize in: WhatsApp Meta Cloud API & On-Premise API Integration Automated payment reminders, notifications & workflows We focus on clean implementation, long-term stability, and business-ready automation, ensuring your system runs smoothly without message failures or compliance issues. We look forward to discussing your requirements in detail and delivering a reliable WhatsApp automation solution for your Gym SaaS. Best Regards, Onprice Infotech Pvt. Ltd. Meta-Approved WhatsApp BSP 12+ Years of IT Industry Experience

@samuelt116

Hello, I’m Samuel, a Senior Full-Stack Developer with hands-on, production experience integrating WhatsApp Meta (Cloud & On-Prem) APIs for transactional and payment-related messaging. I’ve worked specifically on stabilizing near-complete integrations, which matches your situation well. I’m comfortable stepping in at the last 10%—debugging Meta sandbox issues, template problems, and delivery inconsistencies—until the system is production-stable.

@lalits779

Hi, I have hands-on production experience with WhatsApp Meta API (Cloud & On-Prem WABA) and can quickly stabilize your automated payment reminder flow. I’ve worked on backend-triggered transactional WhatsApp notifications and am very familiar with template approvals, sandbox vs production issues, webhooks, and delivery reliability. Your stack (NestJS + React Native) is well within my expertise, and since the core integration is already 90% complete, I can focus immediately on fixing Meta API testing issues, validating templates, and ensuring reliable delivery.