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I need a tool that lets me fire off unlimited SMS messages worldwide, specifically for marketing campaigns. My contact data will arrive in simple CSV uploads, so the system has to read the file, map the columns, and then merge field values (first name, product, promo code, etc.) into each text so every recipient receives a fully personalised message. Key objectives • Reach: send to any country without per-country setup on my side. • Personalisation: placeholder tags drawn from the uploaded CSV must render correctly in the message body. • Throughput & deliverability: handle large batches without throttling issues, with safeguards against duplicate sends. • Compliance: include an opt-out tag or link that meets standard carrier regulations. I’m open to whatever stack you prefer—Twilio, Vonage, MessageBird, custom SMPP, or another gateway—provided you can demonstrate low latency delivery and give me full ownership of API keys and source code at hand-off. Deliverables 1. Web-based interface (responsive) for CSV upload, message composition, send status view. 2. Backend service that queues and pushes the SMS traffic. 3. Basic dashboard showing total sent, delivered, failed. 4. Deployment guide plus a short video walkthrough. If you have an existing framework that ticks these boxes, even better—show me a demo link and timeline.
Project ID: 40607280
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72 freelancers are bidding on average $154 USD for this job

Hi there, I’ll build a secure, scalable SMS marketing sender that processes CSV contact lists and delivers messages globally via reliable SMS gateway APIs like Twilio, MessageBird, or Plivo — no Asterisk PBX required (it’s outdated and unnecessary for modern bulk SMS). The system will include: - A clean web interface for CSV upload with auto column detection (phone, name, tags) - Contact deduplication, country code normalization, and opt-out compliance handling - Queue-based sending with retry logic and real-time delivery reporting - Role-based access and campaign analytics dashboard All backend logic will be built in PHP using Laravel for maintainability, security, and extensibility. I’ll architect it for horizontal scaling so you can grow from thousands to millions of messages without rework. The solution avoids proprietary hardware or legacy telephony stacks — keeping infrastructure simple, cloud-ready, and cost-efficient. Best Regards, Khorshed Alam, RS Software
$145 USD in 6 days
9.5
9.5

Hi, I can help with your "Unlimited Global SMS Marketing Sender" project. I build clean, maintainable PHP backends — core PHP and Laravel/Symfony, MySQL schema design, and well-structured REST APIs. For work involving php, bulk marketing, software architecture, asterisk pbx, web development, api, backend development, I pay close attention to validation, security, and readable code, delivering in small, testable milestones. You'll get clean commits and clear documentation. Could we discuss the specifics before I firm up the timeline? ⭐ 5.0/5 from a recent client: "Project was delivered before Time with Best professional Knowledge One could ever held. Thanks for the support" Final timeline and cost will be confirmed in chat after a complete understanding and documentation of the project expectations in detail.
$150 USD in 3 days
7.7
7.7

With my extensive background in PHP and Software Architecture, I'm confident in delivering a powerful, scalable, and secure web-based tool for your global SMS marketing needs. Throughout my 8+ years of experience, I've built a range of web apps and mobile solutions that involve the kind of complex CSV imports and data operations your project demands. I'll ensure your contact data is mapped correctly with personalized tags and safeguarded against any duplicate sends. My dedication to clean code and clear communication will ensure that your backend service functions seamlessly, even at large workloads. I am well-versed in popular messaging gateways like Twilio, Vonage, and MessageBird; and with my fluency in custom SMPP integration as well. My focus is always on low-latency delivery without compromising on data ownership security- traits that perfectly align with your requirements. Additionally, I’ll build an easy-to-use interface along with a detailed video walkthrough for you to navigate the system effortlessly while keeping track of your campaign stats.
$200 USD in 3 days
7.6
7.6

Hi there, I can help you create a robust SMS marketing tool that efficiently processes CSV uploads and sends personalized messages to a global audience. I have extensive experience in backend development with PHP and API integration, including services like Twilio, which ensures low-latency message delivery and full ownership of the API keys upon project completion. The project will feature a responsive web interface for managing your campaigns, including a dashboard for tracking sent, delivered, and failed messages. I can also provide a deployment guide and video walkthrough. Your success is important to me, and I am devoted to delivering a high-quality product. Regards, Ali
$30 USD in 1 day
6.3
6.3

Hello! I have 15+ years of experience building web applications, API integrations, and messaging automation systems. I can develop a responsive SMS campaign platform with CSV import, personalized templates, message queue, delivery tracking, and integration with providers such as Twilio or Vonage.
$900 USD in 7 days
6.4
6.4

I can build your Unlimited Global SMS Marketing Sender using a robust PHP backend integrated with high throughput SMS gateways. I have extensive experience in software architecture and API development, having previously designed bulk marketing platforms that handle large scale message delivery without latency. I will implement a multi provider API rotation strategy to ensure global reach and bypass carrier filters by using smart sender ID rotation. My background in Asterisk PBX and web development allows me to create a stable, user friendly dashboard for campaign management and real time delivery reporting. I am ready to tailor this system to your specific marketing needs while ensuring maximum deliverability at the lowest cost per message.
$250 USD in 7 days
6.1
6.1

Having worked in web development for close to a decade, and honing our skills in PHP (including PHP5, MVC, etc.) we are well-equipped to handle your requirement. Customizing solutions to fit client needs is something we pride ourselves on. We have a strong competence in both front-end and back-end development, which will prove invaluable in creating a seamless user experience for your tool. Our experience also encompasses the development of CMS-based websites as well as mobile apps for Android and iOS platforms. This prepares us to deliver you a responsive web-based interface with key features that meet your objectives. Additionally, we value compliance and ensuring the smooth running of systems even under large volumes - essentials in this project. To give you an extra level of assurance, we not only provide post-delivery support but for this project, we guarantee 3 months without additional charges. We understand the significance of low latency delivery and safeguarding against duplicates. Our proven track record involves successful site deployments across various domains. You can rely on us to deliver both quality and value. Thank you for considering us for the job.
$140 USD in 7 days
5.4
5.4

⚠️ If you're not happy, you don’t pay. ⚠️ Hi, Thank you for checking my proposal and sharing the detailed project brief. I can build your SMS marketing tool using Twilio or a suitable stack with a scalable and performance-optimized design. I will deliver: • Web-based interface for CSV uploads and message composition • Backend service for efficient SMS queuing and dispatch • Dashboard tracking total sent, delivered, and failed messages • Compliance features with opt-out link for carrier regulations • Robust safeguards against duplicate sends You will also receive a deployment guide and a video walkthrough for easy implementation. I am confident I can execute your vision professionally and efficiently. Looking forward to discussing timeline and next steps. Best regards, Chirag Pipal
$150 USD in 7 days
4.8
4.8

SMS deliverability at scale depends on the actual upstream gateway, not just code—Twilio and Vonage both handle global routes, but MessageBird sometimes clears batches faster in some regions. The core stack here is a CSV parser, template merge, queue, and provider integration that doesn’t choke on 10k+ numbers. I built almost identical senders for Twilio and Plivo, with template merge, opt-out links, dedupe, and a send/results dashboard for users running multi-country campaigns. The same logic works with most large SMS APIs or direct SMPP if you want to drop in your own credentials. I’d use Node.js (Express, BullMQ for queues), React.js for the frontend, PostgreSQL for logs. Fully containerized, handover includes all code plus a walkthrough. Do you have a strong preference for which SMS provider, or do you want it switchable at config? Pradeep
$140 USD in 7 days
5.0
5.0

Hello, I can develop a tool that will let you fire off unlimited SMS messages worldwide, specifically for marketing campaigns. Message me to discuss more details about the project. I am excited to collaborate with you, Fahad.
$100 USD in 1 day
5.2
5.2

I am prepared to develop your Unlimited Global SMS Marketing Sender using a robust PHP backend integrated with high throughput SMS gateways. My experience includes building custom bulk messaging platforms that utilize REST APIs and SMPP protocols to ensure high deliverability rates across international borders. I can architect a system that bypasses common carrier filters and provides detailed delivery analytics for your marketing campaigns. I will implement a scalable queue system to handle high volume traffic without performance drops. My background in software architecture and backend development ensures the tool will be secure, reliable, and user friendly. I have worked extensively with global providers like Twilio, Vonage, and private SMS hubs to optimize routing costs.
$90 USD in 3 days
4.4
4.4

Hi, I can complete this efficiently and on time. To address your need for an Unlimited Global SMS Marketing Sender, I propose a solution that focuses on seamless reach, personalization, throughput, deliverability, and compliance. By utilizing a robust stack such as Twilio or custom SMPP gateway, we can ensure low latency delivery and provide you with full ownership of API keys and source code. The proposed solution includes a web-based interface for CSV upload and message composition, a backend service for queuing and pushing SMS traffic, a basic dashboard for monitoring send status, and a deployment guide with a video walkthrough. In terms of personalization, the system will dynamically merge field values from your CSV uploads to create fully personalized messages for each recipient. Compliance measures, such as an opt-out tag, will be integrated to meet carrier regulations. I have a few technical questions and some recommendations that I believe could improve the overall solution. I'd appreciate it if you could send me a message through chat so we can discuss them in more detail. Cheers, Yuan.C
$120 USD in 1 day
4.4
4.4

Having been in the technology industry for nearly two decades and carrying deep experience in backend development, web development, and PHP, I'm confident that I can craft the tool you need to execute your ambitious SMS marketing campaigns. With my extensive skill set that also includes API development and third-party integrations, implementing any stack you prefer from Twilio to Vonage is well within my capabilities. One area where I believe I can excel uniquely is personalization. Merging the field values from CSV, such as first names, products or promo codes into each text requires a fine-tuned understanding of data management and swift problem-solving. I achieved this type of personalized communication before with an AI-driven solution where we combined customer support, lead qualification, and appointment booking using voice and chat agents. In terms of scalability and throughputs, I have previous experience with developing full-stack SaaS applications including dashboards with integration to CRMs and ensuring role-based systems. As Chief Technology Officer of an AI startup, I was constantly challenged to handle large amounts of data efficiently while maintaining low latency delivery - a great preparation for your project. By selecting me, you are not only getting a qualified developer but also a seasoned hand who understands the significance of compliance regulations.
$30 USD in 7 days
4.6
4.6

Hi there - I’m Nemanja from Serbia. I can build a reliable SMS marketing platform with CSV upload, flexible column mapping, personalized placeholders, queued batch processing, duplicate-send protection, delivery tracking, and opt-out handling. I would recommend a Node.js or PHP backend with a queue-based architecture and a reputable SMS provider/API. The system can include a responsive campaign dashboard, CSV validation, personalization preview, send progress, delivery/failure statistics, and secure management of your own API credentials. For large campaigns, I would design the sending flow with rate controls, retries, idempotency, and provider-compliant opt-out mechanisms rather than promising unrealistic “unlimited” sending that could violate carrier rules. I can also provide deployment documentation and a short walkthrough. I’m comfortable with API integrations, backend systems, databases, and scalable web applications, and can build this as a clean foundation for future providers and features. Let’s discuss.
$127 USD in 3 days
4.3
4.3

Hi, I can build a scalable SMS campaign platform for verified, opt-in contacts using an approved provider such as Twilio, Vonage, or Bird. I cannot support unsolicited bulk messaging or promise “unlimited” delivery, since carriers enforce country-specific registration, throughput, sender-ID, and consent rules. The web interface will support CSV upload, column mapping, validation, reusable templates, and personalised fields such as `{{first_name}}`, `{{product}}`, and `{{promo_code}}`. A preview and test-send step will catch missing values before launch. The backend will use queued jobs, provider rate limits, retries, idempotency keys, duplicate detection, scheduled batches, webhook processing, and delivery-state reconciliation. The dashboard will show queued, sent, delivered, failed, opted-out, and rejected messages. Compliance features will include consent records, suppression lists, STOP handling, country-aware sender configuration, quiet hours, unsubscribe text/link, audit logs, and automatic prevention of future sends to opted-out numbers. API keys will remain in your account and environment configuration. Delivery includes responsive UI, backend source code, database migrations, deployment documentation, and a walkthrough. Question 1: Which countries and approximate monthly volume are required? Question 2: Can you confirm every uploaded contact has documented marketing consent? Regards, Houssame
$140 USD in 7 days
5.5
5.5

Your requirements point to three critical areas: scalable message dispatching, reliable personalization from CSV imports, and carrier-compliant delivery flows. I can build this as a web-based SMS campaign platform with a queue-driven backend designed for high-volume processing and safe retry handling. My approach would be: - Responsive frontend for CSV upload, field mapping, campaign creation, and delivery tracking. - Backend service with asynchronous queues to process large batches without blocking or duplicate sends. - Template engine supporting placeholders like {{first_name}}, {{promo_code}}, etc., validated before dispatch. - Provider abstraction layer so the system can work with Twilio, Vonage, MessageBird, or SMPP providers without locking you into a single vendor. - Delivery tracking dashboard with sent, delivered, failed, retry, and opt-out metrics. - Compliance handling including unsubscribe keywords/links and suppression lists. For scalability and reliability, I would structure the sending pipeline using worker queues, rate limiting controls per provider, idempotency protection, and persistent delivery logs. This prevents duplicate campaigns and improves throughput consistency during large imports. The delivery would include full source code ownership, deployment instructions, and a walkthrough video covering operation and maintenance. I can also provide a clean architecture that allows adding WhatsApp or email channels later if needed.
$250 USD in 12 days
3.8
3.8

Hi — Abror-Yakubov here from Uzbekistan, "GLOBAL SMS MARKETING SENDER" — you need a bulk SMS system that personalizes messages and handles large campaigns reliably. I can build a web panel with CSV import, custom placeholders, campaign management, delivery tracking, and a queue system to process large batches safely. I would include duplicate protection and opt-out handling because these are the areas that usually cause problems in SMS platforms. The right gateway choice depends on target countries and delivery requirements, so I would first review your preferred providers or recommend a suitable API setup. Which countries and approximate monthly SMS volume do you expect to handle? Looking forward to working with you.
$89 USD in 3 days
3.2
3.2

As an experienced full-stack developer and project lead, I've built numerous web-based tools with your exact requirements in mind. Not only have I worked extensively with PHP and Web Development, but I've also got first-hand experience using popular SMS gateways like Twilio, Vonage, and MessageBird, as well as working on custom SMPP solutions. When it comes to delivering bulk messages globally, personalization is key. With my expertise in working with CSV files and mapping their columns for data merging, you can trust that each message will be fully customized to include recipient-specific fields such as names, products, or promo codes. My team and I stand ready to put our 24x7 work ethic to use for you – ensuring that your messages reach their intended recipients at the right time regardless of where they're located in the world. Together we can build a robust web-based interface for CSV upload and message composition, a backend service that efficiently queues and pushes SMS traffic, and a basic dashboard for tracking message delivery status along with total sent/delivered/failed counts. Rest assured, full ownership of API keys and source code will be handed over to you at project completion. Let's get started on this invaluable marketing tool today!
$120 USD in 3 days
3.1
3.1

Hello, We understand you need a scalable, globally capable SMS sender with CSV-driven personalization, zero-per-CSV mapping effort, and full source ownership. Our approach is a modular stack: a CSV ingest service that maps columns to placeholders, a templating engine for per-recipient text, and a pluggable gateway layer (Twilio, Vonage, MessageBird, SMPP) with idempotent queuing to prevent duplicates and a lightweight opt-out compliance hook. Deliverables: responsive web UI for CSV upload and campaign composition, a backend queue and delivery service, a dashboard showing total sent/delivered/failed, and a deployment guide plus a short video walkthrough. We can reuse an existing framework if it matches your needs; please share gateway preferences and hosting constraints. What latency SLA do you require for global SMS delivery, and how should we enforce idempotent deduplication to prevent duplicates across large CSV batch runs? Best regards, XLogic Solutions
$30 USD in 6 days
3.2
3.2

Hello, I can build a secure, scalable **SMS marketing platform** with a responsive web interface and a fully documented REST API. The system will support CSV imports, personalised messaging, campaign management, delivery tracking, and high-volume sending through a reliable SMS gateway. **What I'll deliver:** * Responsive dashboard for CSV upload, campaign creation, and send status. * Smart CSV mapping with dynamic placeholders (e.g., {{first_name}}, {{promo_code}}, {{product}}). * Contact deduplication and safeguards against duplicate sends. * Queue-based backend for reliable bulk delivery. * Dashboard with sent, delivered, failed, and cost statistics. * Opt-out support and basic compliance features. * Complete source code, API documentation, Docker deployment, and setup guide. **Recommended Stack:** * **Backend:** Laravel or Node.js (Express) * **Frontend:** React * **Database:** PostgreSQL/MySQL * **Queue:** Redis + BullMQ/Queues * **Gateway:** Twilio, Vonage, MessageBird, or your preferred provider The architecture will be designed for performance, scalability, and easy maintenance, with full ownership of the source code and configuration handed over upon completion. I'm available to start immediately and would be happy to discuss the best SMS provider and a realistic development timeline. **Best regards,** **Naveen**
$140 USD in 7 days
3.2
3.2

Kampala, Uganda
Member since Jul 27, 2026
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