Advanced Call Center and SMS Platform

@mrresearcher99

Hello, I’m a full-stack developer with 10 years of experience building scalable communication platforms, CRM systems, and real-time applications. I can contribute across React.js, Node.js, PostgreSQL, Redis, REST APIs, React Native, and cloud deployment for a platform of this complexity. I would structure the system around a modular backend supporting multi-tenancy, RBAC, campaigns, agent workflows, billing, reporting, and provider integrations. The telephony layer can be isolated behind provider adapters for SIP/WebRTC integrations, routing, failover, CDRs, and call events, while Redis and WebSockets handle real-time agent and campaign activity. SMS providers can follow the same extensible architecture. For mobile, React Native can provide shared Android/iOS functionality, while Electron can support the desktop application. Security, API rate limiting, audit logging, scalability, and monitoring would be considered throughout. I’d be glad to discuss the architecture and development milestones. Best regards

@pinkeegupta

Hi I will be able to help you. Please message me so that we will have detail technical discussion. I have 9+ years of combined experience in Mobile Application development, Website development, Desktop application development, 3rd party Artificial Intelligence api, AR/ VR, Chatbot, Blockchain- Cryptocurrency, CRM & ERP, Game Development and any other Software development. Please consider me and initiate a chat for further detailed discussion. Regards, Anju Logical Soft Tech Pvt Ltd, Indore(M.P)

@jayantkumar314

Having worked as a Senior Software Engineer since 2015, I've acquired extensive expertise in mobile app development, Node.js, and React.js. Your project description syncs well with my skills and experience as I have successfully engineered highly scalable and technically advanced call center platforms. Majoring in NestJS/NodeJS on the backend and ReactJS on the frontend, I am confident in proposing an optimal solution that fully satisfies your requirements. The inclusion of my Flutter or React Native knowledge aligns perfectly with your need for both Android and iOS applications. Meanwhile, I am comfortable developing a Windows/macOS desktop application using Electron complemented with writing stable backend solutions utilizing PostgresSQL+ Redis database structure. Understanding your project's scope and requirements shouldn't put you at odds with seeming time limits; that's why I'm committed to maintaining efficient communication lines, meeting set timelines while delivering quality code and establishing a long-term cohesive relationship as reflected in my motto "There's extraordinary chemistry in long-term relationships." With this assurance, I await an opportunity to do justice to your project requirements!

@jafarali14

Hi Sir Madam I am a Flutter developer with 5 plus years of experience and can work with your team to build the complete call center dialer and communication platform. I recommend NestJS Node js, React Next js, Flutter, Electron, PostgreSQL, Redis and WebSockets for a scalable architecture. Skills Flutter Dart GetX NestJS Node js REST APIs React Next js and Electron SIP VoIP WebRTC and RTP Integration Predictive Progressive and Power Dialers Call Recording and CDR IVR and Call Routing SMS Gateway Integration Real Time Dashboards Multi Tenant Admin Panel Redis and PostgreSQL Docker Linux and CI CD I can implement agent applications, desktop softphone, dialer campaigns, call queues, SIP provider routing, LCR, failover, DID management, SMS campaigns, OTP, reporting, billing and real time monitoring. The architecture will support multiple providers, RBAC, audit logs, usage limits, secure authentication and horizontal scaling. I will provide complete source code, APIs, database, documentation, testing and production deployment. Published apps EasyBalance App Store Wynette Logistics App Store MyKidsEdu App Store We can discuss your existing VoIP providers, SIP infrastructure, SMS gateways, team structure, milestones and timeline in chat. Thanking you All the very best Cheers

@UzeeTech

This multi-tenant communications product needs one auditable event model for agent state, campaigns, SIP/WebRTC calls, SMS, CDRs, roles, and usage limits. I’ll validate a vertical slice before the web, mobile, and provider matrix. I have not shipped a VoIP/call-center platform to claim, so I won’t invent one. My real work includes B2B, e-commerce, and marketplace software plus an AI website generation platform, backed by 9+ years. I can structure Node/NestJS with React/Next, Flutter, Electron, PostgreSQL, Redis, WebSockets, Docker, RBAC, and provider adapters. The first phase can prove login/roles, a SIP/WebRTC provider, agent status, click-to-call, CDR, an SMS gateway, retries, webhooks, and usage controls. I’ll keep telephony behind interfaces for routing, failover, recording, and more providers. QA covers concurrent calls, reconnects, duplicate webhooks, permissions, delivery failures, limits, and audits. Delivery includes source, tests, docs, and deployment notes. Which provider, compliance region, recording policy, and first platform are fixed? My ₹50,000 bid covers a 21-day architecture and vertical-slice milestone; scope follows review. I can start with event map.

@guptakishan805

As an experienced full stack developer with a specialty in VoIP, I am confident that I can deliver the Advanced Call Center and SMS Platform you require. Having worked in similar telecom projects before, I possess the deep knowledge of Asterisk PBX, Node.js, and React.js which will allow me to build a reliable platform adept in handling Predictive/Progressive/Power/Preview Dialer, Click-to-Call, IVR integration, VoIP/SIP Integration, SMS Integration and much more. With my expertise in React Native and Flutter, I can also build the user-friendly Android / iOS application for your agents and customers. My involvement at all stages of project development including API documentation and Production deployment would ensure a smooth implementation without any disruptions. Scalability and security are key aspects that must be addressed in such systems and having successfully delivered numerous QA tested products with Docker+Linux based infrastructure; I am well-prepared to handle these requirements. With me on your team, you are promised 100% commitment and dependability, together we can turn your idea into a solid pliable fact. Let's discuss further on how to embark on this journey together.

@albert1025dev

Hi, Albert here "VOIP/SIP + WEBRTC CALL CENTER DIALER" — you need reliable real-time calling, routing, SMS, and agent management across web, desktop, and mobile. I’d build the telephony layer around Asterisk/SIP with WebRTC for browser agents, Node.js for the API and call-control services, and Redis for queues and real-time agent status. I’d also handle provider failover and idempotent call/SMS events so duplicate webhooks or provider failures do not create incorrect CDRs or usage records. Can you share which VoIP/SIP and SMS providers you already plan to integrate? Looking forward to work with you.

@Cumuc

Hi Mate , Good afternoon! I am professional mobile coder with skills including Asterisk PBX, Mobile App Development, Flutter, Desktop App, Node.js, React.js, WebRTC, SIP and VoIP. Please contact me to discuss more regarding this project. Looking forward to hearing from you soon

@KarthikTechCon

Hello, I am Karthik, a seasoned developer with over 10 years of experience in building advanced communication platforms, including VoIP and SMS integrations. I am excited about the opportunity to develop your comprehensive Call Center Dialer and SMS Platform. Our team specializes in delivering solutions that encompass predictive, progressive, and power dialers, alongside robust SMS functionalities. We have extensive experience in integrating with various VoIP/SIP providers, ensuring seamless connectivity and efficient call management. Our approach includes utilizing technologies such as Node.js, React, and WebRTC, ensuring a scalable and high-performance system. We understand the importance of features like IVR integration, call analytics, and real-time monitoring for both agents and supervisors. Additionally, our focus on security and scalability will ensure that your platform meets the highest industry standards. We are committed to delivering a complete solution: from backend and API development to mobile and desktop applications, all tailored to your specific requirements. We will also provide thorough documentation and support for deployment and maintenance. Looking forward to discussing this project further and sharing our technical approach and timeline. Best regards, Karthik

@akkiwadhwa1995

Built API-heavy real-time platforms with React + Node, including WebRTC calling and provider-API integrations. I'd deliver the web/mobile agent app and supervisor layer — click-to-call, queue/disposition/agent-status, live campaign monitoring, CDR and analytics — on top of a VoIP provider (Twilio/Plivo or Asterisk via SIP/WebRTC) so the dialer primitives are battle-tested rather than reinvented. Predictive/progressive/power modes handled in the campaign engine. Clean, documented handoff. Which VoIP provider or switch are you planning to use?

@christech1117

Hi Chris here. You need a full call-center suite — predictive/progressive/power/preview dialing, IVR, queues, recording, disposition and a live supervisor dashboard — plus multi-provider SIP/WebRTC routing with LCR and failover, and a complete SMS module (bulk, transactional, OTP, campaigns, delivery reports) across several gateways, wrapped with an agent mobile app. I'd build the telephony on Asterisk or FreeSWITCH with ARI/ESL driving the dialer logic, WebRTC softphone in the browser for agents, and a Node/Python API layer feeding real-time monitoring over WebSockets. SMS goes through a provider-abstraction layer so gateways and sender IDs are swappable, with queued scheduling and DLR callbacks. Mobile in React Native sharing that same API. CDRs sync back per provider for reporting and balance tracking. One thing decides the whole architecture: are you bringing an existing switch (Asterisk/FreeSWITCH/other) and SIP trunks, or do I stand the media stack up from scratch?

@w3loop

Hi, I can help build your call center and SMS platform using a scalable Node.js/NestJS + React + PostgreSQL + Redis + WebRTC/SIP architecture. Core implementation: • Multi-tenant admin/supervisor dashboard • Agent, team and campaign management • Progressive/power/preview dialer architecture • SIP/WebRTC calling, IVR, transfer, hold, mute and recording • Call disposition, CDR, history and analytics • Multiple VoIP providers with routing/failover • SMS gateway integration for OTP, transactional and bulk SMS • Contacts, groups, templates, scheduling and delivery reports • Real-time monitoring using WebSockets • REST APIs/webhooks for CRM and third-party integrations • RBAC, JWT/OAuth, rate limiting, audit logs and usage controls • Docker-based deployment and scalable infrastructure I have 8+ years of full-stack experience with Node.js, Laravel, React, REST APIs, databases and third-party integrations. I would first validate the exact SIP/VoIP and SMS provider requirements before implementing telecom-specific functionality. Because this is a large platform, I recommend milestone-based delivery, beginning with the core admin/agent platform and one VoIP + one SMS provider, then expanding to additional providers and mobile/desktop applications. Phase 1 Bid: ₹70,000 INR Timeline: 30–40 days I can start with architecture and technical discovery immediately. Regards, TechAvinya

@Himanshu123gupta

Hi, I’ve carefully reviewed the complete requirements. This is a large communication platform, so I would approach it in milestones rather than trying to build everything at once. I can handle the React/Node.js/API side, authentication, RBAC, multi-tenant architecture, campaign/contact management, dashboards, real-time WebSocket communication, SMS integrations, reporting and database architecture. For the telephony layer, I would first confirm your SIP/VoIP provider, WebRTC requirements and available APIs before finalising the implementation approach. The same applies to SMS providers and routing. Phase 1 can cover: backend/API architecture, admin panel, agent management, campaigns, contacts, authentication, basic SMS integration and the initial calling workflow. After the core is tested, we can add predictive/progressive dialing, advanced routing, mobile apps, desktop app, billing and scaling as separate milestones. I can start immediately and provide source code and deployment documentation throughout the project. Regards, TechAvinya

@TechWagger2026

I’m Arun from TechWagger, and I believe my team’s expertise can offer just what you need for building your advanced call center and SMS platform. We boast a strong foundation in Flutter, Mobile App Development, Node.js, and React.js – all of which aligns perfectly with your project's technical stack and needs. Our track record includes successful developments of custom software, web and mobile applications that are secure, scalable and yield high performance. Having worked with businesses across various industries including telecoms, we understand the unique challenges of a call center including predictive dialing, power dialing, IVR integrations, call transfer/hold/mute, campaign management etc. We’ve successfully implemented these features into our past projects with similar requirements. Our skills extend beyond just the creation of individual functions; we’re experienced in creating tailored solutions that interconnect seamlessly to form a cohesive tech ecosystem. Our approach is solution-oriented - first understanding your goals and challenges then devising practical solutions that align perfectly with long-term scalability. Through the whole product development lifecycle from concept to deployment we maintain transparency while delivering on schedule - vital components for building real value for yourça business. So let's not focus solely on choosing the lowest bidder but also on who is capable and ready to deliver

@kamanil

Hi, I can build this call center + SMS platform with the right base architecture for dialers, SIP/WebRTC calling, agent dashboards, and provider integrations. I work on Node.js, React.js, Flutter, Web API, Docker, Redis, MongoDB/MySQL, and mobile apps, so this scope matches my experience well. Approach: 1. First build core backend, auth, RBAC, campaign, CDR, call status, and SMS modules. 2. Add SIP/WebRTC integration, provider routing, LCR, failover, and recording. 3. Then deliver web admin, agent app, desktop app, and Android/iOS apps with realtime sync. 4. Add reports, audit logs, billing, deployment docs, and QA. I can handle this in phases with clear milestones and regular updates. For a fixed project of this size, my quote is INR 75,000, keeping in mind the multi-platform work, telephony integration, and testing effort. Timeline: around 75 days for a solid first production release. If you want, I can share a milestone plan for web, mobile, and telephony separately. Best, Anil K

@MrShortFlow

The core problem here is scope versus phase one: a full predictive dialer, SIP/VoIP routing engine, SMS gateway layer, plus native mobile, desktop and admin apps is a multi-month build, so the first milestone should lock architecture and prove one working call-and-SMS flow end-to-end before scaling to campaigns and agents. Phase 1 (v1 within 8 days): NestJS + PostgreSQL + Redis backend skeleton, WebRTC click-to-call through one SIP trunk provider, a basic agent web dashboard (login, call controls, disposition), an SMS module wired to one gateway (send, receive, delivery report), and an admin panel shell with routing-rule tables ready for LCR/failover logic. Two first decisions: use an open-source SIP core (FreeSWITCH or Asterisk) behind the NestJS layer, since it handles trunk registration and call legs reliably without licensing cost; and build agent status and call events over WebSocket from day one, since retrofitting real-time monitoring later is far more expensive than designing for it now. I do not promise native iOS/Android/desktop apps or a production multi-tenant billing system within this phase — those follow as separately scoped milestones once the core flow is proven. Which SIP/VoIP provider and SMS gateway should phase 1 integrate against, and can sandbox credentials be shared once the milestone starts. Price: 41300 INR fixed · Timeline: 8 working days from access/brief Konrad

@munilmaa

? A platform this powerful needs more than a dialer that simply makes calls. I can build a reliable communication system covering calling, SMS, agent management, campaigns, reporting, and real time monitoring across web, mobile, and desktop. I have experience with communication platforms, APIs, real time systems, and scalable dashboards. I’ll build it in clear stages, test each workflow carefully, and keep security and reliability in focus. I can also add smart usage alerts to help prevent unexpected call or SMS costs. Let’s discuss the scope and roadmap.

@abhilashr53

You need a production-grade, multi-tenant call center platform that unifies predictive and progressive dialing, full VoIP/SIP/WebRTC telephony, and a robust SMS engine, all accessible from web, desktop, and mobile. This is a serious infrastructure project and I want to be direct about how I would build it correctly. My approach starts with a microservices architecture on Node.js and Go, with React for the web dashboard, Flutter for iOS/Android, and Asterisk or FreeSWITCH as the telephony core handling SIP trunking, RTP media, and WebRTC bridging. Kamailio manages SIP proxying and least-cost routing with automatic failover. Redis handles real-time agent state and queue events, PostgreSQL stores CDR and campaign data, and a message queue like RabbitMQ drives the predictive dialer logic. SMS routing sits behind a provider-agnostic gateway layer supporting Twilio, Vonage, and custom SMPP connections simultaneously. Key risks I address upfront are concurrent call scaling, media server redundancy, regulatory compliance for call recording, and carrier-grade SMS delivery tracking with DLR reconciliation. I have deep experience in FreeSWITCH ESL integration, WebRTC signaling, and building supervisor dashboards with sub-second real-time updates. Realistic delivery across phased milestones runs 20 to 28 weeks depending on provider count and compliance requirements. Can we schedule a 30-minute call this week to confirm your expected concurrent agent count and which VoIP providers you are already contracted with?

@alfatrade2

Predictive, progressive, power and preview dialers plus WebRTC, SIP trunks and mobile apps is a lot for $783, so I'd propose a first phase: web agent console with progressive and click-to-call, recording and CDR, on top of Asterisk. Predictive pacing needs real call volume to tune. Which SIP provider are you on? I've built an outbound calling voice agent with offline Whisper STT and dialog handling.