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FreeSWITCH, Asterisk, FusionPBX, VoIP, Contact Center (CCaaS), AI Automation & Voice Agent Architect with 20+ years of engineering experience and 90+ successful Upwork projects. I help telecom providers, startups, BPOs, answering services, and service businesses build production-ready communication platforms, AI voice systems, and workflow automations that reduce manual work, improve customer handling, and scale reliably. My core work spans FreeSWITCH, Asterisk, FusionPBX, SIP, WebRTC, Contact Center platforms, multi-tenant PBX, AI Voice Agents, and business process automation. Whether you need a hosted PBX, a custom CCaaS platform, AI-powered call handling, or workflow automation across CRM, support, and operations, I can design, build, integrate, and scale the complete solution. Contact Center (CCaaS), PBX & VoIP Platform Development I build complete telecom and customer communication platforms for telecom providers, contact centers, answering services, and enterprise teams. Services include: • Custom Contact Center (CCaaS) platforms • Hosted PBX, UCaaS, and Multi-Tenant PBX systems • Agent dashboards, supervisor panels, wallboards, and reporting • Skill-based routing, IVR, call flow automation, and queue management • Predictive, progressive, and power dialers • Call recording, monitoring, whisper, barge, and analytics • CRM integrations, click-to-call, callback workflows, and usage reporting • DID provisioning, SIP trunk integrations, and carrier connectivity • White-label telecom platforms for providers and resellers FreeSWITCH, Asterisk & FusionPBX Development Telephony is my core specialization—not just PBX setup, but full product and platform development. I work on: • FreeSWITCH ESL development, custom dialplans, and call routing logic • Asterisk AGI, AMI, and ARI integrations • FusionPBX and FreePBX customization • VICIdial and outbound campaign platform customization • Multi-tenant PBX architecture and provisioning flows • SIP trunking, DID routing, RTP troubleshooting, and WebRTC softphones • Performance optimization, high-availability design, and production deployment AI Voice Agents, AI Integration & Workflow Automation I help businesses use AI where it creates measurable operational value—not just demos or isolated bots. I design and implement: • AI Voice Agents, AI receptionists, AI IVR, and intelligent call routing • OpenAI, Claude, Gemini, and real-time voice integrations • Voice AI workflows for customer service, after-hours call handling, lead qualification, and phone automation • CRM automation, email automation, reporting workflows, and internal process automation • AI assistants for support teams, operations teams, and internal knowledge workflows • API-based workflow automation across multiple systems and business tools Tools and platforms I work with include OpenAI, Claude, Gemini, LiveKit, ElevenLabs, Deepgram, REST APIs, webhooks, and custom backend integrations. Where needed, I can also help evaluate the right automation stack and connect AI capabilities into your existing business systems. Technology Stack Telephony: FreeSWITCH, Asterisk, FusionPBX, FreePBX, VICIdial, SIP, RTP, WebRTC, SIP.js, Twilio, Telnyx, LiveKit Backend: Node.js, NestJS, Python (FastAPI), Laravel, PostgreSQL, MongoDB, Redis, REST APIs, WebSockets Infrastructure: Linux, Docker, Kubernetes, Nginx, AWS, Azure, GCP, Prometheus, Grafana, CI/CD Recent Project Types • Multi-tenant CCaaS platforms with real-time dashboards and analytics • AI Voice Agents integrated with FreeSWITCH using OpenAI Realtime API • FusionPBX deployments and customizations for hosted PBX providers • VICIdial implementations with CRM integration and outbound campaign workflows • Telecom ERP systems with CDR billing, DID provisioning, and reseller management • Answering service platforms with AI-assisted routing and live-agent fallback • Custom workflow automation and AI integration for communication-heavy operations Why Clients Hire Me ✔ 20+ years building telecom, VoIP, and communication software ✔ 90+ successful Upwork contracts ✔ Deep expertise in FreeSWITCH, Asterisk, FusionPBX, SIP, and Contact Center systems ✔ Ability to combine telecom engineering, backend development, and AI automation in one solution ✔ Production-ready architecture with realistic scoping and long-term support ✔ Clear communication, practical implementation, and business-focused problem solving If you need a consultant or hands-on developer for FreeSWITCH, Asterisk, FusionPBX, Contact Center platforms, AI Voice Agents, VoIP systems, or AI workflow automation, I can help you build a reliable solution that supports real business operations—not just prototypes.

✅ Top Rated Plus AI Agent Development ✅ 100% Job Success Score ✅ Fluent English Verified AI Voice Agents | Twilio Expert | SMS, Calling & CRM Automation I help businesses automate customer communication using AI Voice Agents, SMS Automation, Calling Systems, CRM Integrations, and Communication Workflows. With 130+ completed projects, Top Rated Plus status, and a 100% Job Success Score, I specialize in building production-ready systems that answer calls, qualify leads, book appointments, automate follow-ups, improve customer response times, and reduce manual work. My expertise combines modern AI technologies with real-world communication infrastructure, helping businesses move from manual processes to scalable automation. 𝗖𝗼𝗿𝗲 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 📞 Voice AI & Communication Automation AI Voice Agents, AI Receptionists, AI Calling Systems, Appointment Booking Agents, Lead Qualification Systems, Customer Support Automation, Contact Centers, IVR Systems, SIP, SMS Automation, Call Routing 🤖 AI Solutions & Conversational Systems OpenAI, Claude, Gemini, Vapi, Retell AI, Conversational AI, Knowledge Assistants, Internal AI Tools, Business Automation ⚙️ CRM & Workflow Automation Lead Management, Pipeline Automation, Customer Communication Workflows, CRM Integrations, Automated Follow-Up Systems 𝗦𝗲𝗿𝘃𝗶𝗰𝗲𝘀 📞 AI Voice Agents & Calling Systems • AI Receptionists • AI SDRs • Appointment Booking Agents • Customer Support Agents • Outbound Calling Systems • Inbound Voice Automation • Voice AI Integrations 📡 Twilio & Communication Solutions • Twilio Development • SMS Platforms • IVR Systems • Call Center Solutions • Twilio Flex • Voice & Messaging Automation • Toll-Free & A2P 10DLC Solutions ⚙️ CRM & Business Automation • HubSpot Integrations • GoHighLevel Automation • Salesforce Integrations • Custom CRM Development • Lead Qualification Workflows • Business Process Automation 🧠 OpenAI, Claude & AI Integrations • ChatGPT Solutions • Claude Integrations • AI Assistants • Knowledge Systems • Internal AI Tools • RAG Applications 📱 SaaS, Web & Mobile Applications • Customer Portals • Admin Dashboards • AI-Powered Platforms • Web Applications • Mobile Applications 🖥️ Backend Development Python, Node.js, FastAPI, Express.js, REST APIs, Webhooks, Microservices 💻 Frontend Development React, Next.js, Vue.js, Angular 📱 Mobile Development React Native, Flutter, Swift, Kotlin ☁️ Cloud & Infrastructure AWS, Azure, GCP, Docker, CI/CD, Serverless Architectures 📊 Databases & AI Infrastructure PostgreSQL, MongoDB, Firebase, Supabase, Vector Databases 𝗜𝗻𝗱𝘂𝘀𝘁𝗿𝗶𝗲𝘀 • Real Estate & Property Management • Healthcare & Wellness • LegalTech • Financial Services • Logistics & Transportation • Professional Services • Call Centers • Home Services • SaaS & Technology Companies If you're looking to automate calls, SMS, customer communication, lead qualification, appointment booking, or customer support using AI and Twilio-based communication systems, let's discuss your project. Keywords: AI Voice Agent, AI Receptionist, AI Calling Agent, Twilio Developer, SMS Automation, IVR Development, CRM Automation, Voice AI, OpenAI, Claude, Vapi, Retell AI, Contact Center Solutions, Call Center Automation, Lead Qualification, Appointment Booking, Customer Communication Automation, Workflow Automation, Conversational AI, SaaS Development, Python, Node.js, React

With 16+ years of experience, I help businesses build scalable, secure, and high-performance communication platforms. I specialize in end-to-end VoIP development, WebRTC applications, and AI-powered voice automation. Core Expertise: VoIP Development (Asterisk, FreeSWITCH, Kamailio, OpenSIPS) WebRTC Apps (Audio/Video Calling, Live Streaming) SIP, RTP, IVR, Call Routing & Softswitch (Class 4/5) AI Voice Bots & AI Receptionist Solutions UCaaS, CPaaS & API Integration (Twilio, Plivo, etc.) Media Streaming & Low-Latency Systems Scalable Server Architecture (AWS, Docker, Kubernetes) CRM/ERP & Third-party Integrations WebRTC Application Development - Audio & Video Conferencing - WebRTC, Jitsi, Twillio, OpenTok, Kurento - Screen Sharing, Recording - Online Tutoring and E Learning - Telemedicine and Health Applications - Video Broadcasting and Live Streaming - SFU, STUN & Multiple Server architectures VoIP Service: - Asterisk/Freeswitch/OpenSIP/Kamilio setup & Configurations - PBX System & Software Development - Unified Communication Software - CallCenter Softwares - DID Management - Auto/Predictive Dialer - Mobile or Sip or VoIP Dialers - Real Time billing software - Distributed Server Architecture - Load Balancing and failover setup - Server Administration, Maintenance & 24*7 Support AI-Integration and Automation - Smart voice agents (inbound & outbound calls) - AI chatbots for web, WhatsApp & apps - Speech-to-text & text-to-speech integration - Multilingual conversational systems - Call automation (sales, support, reminders) - AI receptionist and appointment setter - AI content generation (text, image, audio) - Knowledge base chatbots - AI copilots for internal teams - Integrated LLMs for context-aware, deterministic voice interactions Technology, Platforms and languages expertise: Frontend Web: Angular, React.js, Vue.js, PHP Backend: Java, PHP, Laravel, Node.js, Python WebRTC: Native, Kurento, Tokbox, Jitsi, janus, OpenVidu VoIP: Freeswitch, Asterisk, Twillio, Kamilio, OpenSIP, FusionPBX, FreePBX, SIPJs AI/ML: OpenAI, Whisper, ElevenLabs, n8n, Retell

I have extensive working experience in successfully registration in Twilio A2P 10DLC , Twilio text message marketing, Voice API, Bulk messaging, Twilio studio IVR Flows and ensuring businesses stay compliant while maximizing engagement. 𝐖𝐡𝐞𝐭𝐡𝐞𝐫 𝐲𝐨𝐮’𝐫𝐞 𝐮𝐬𝐢𝐧𝐠 𝐓𝐰𝐢𝐥𝐢𝐨, Aircall, 𝐆𝐨𝐇𝐢𝐠𝐡𝐋𝐞𝐯𝐞𝐥 (𝐆𝐇𝐋), 𝐉𝐮𝐬𝐭𝐂𝐚𝐥𝐥.𝐢𝐨, 𝐒𝐦𝐫𝐭𝐏𝐡𝐨𝐧𝐞.𝐢𝐨, 𝐑𝐢𝐧𝐠𝐂𝐞𝐧𝐭𝐫𝐚𝐥, 𝐆𝐨𝐜𝐨𝐧𝐧𝐞𝐜𝐭, 𝐨𝐫 𝐀𝐥𝐨𝐰𝐚𝐫𝐞, I streamline your SMS marketing strategy and make compliance seamless. 📌 What I Offer: ✅𝐀𝟐𝐏 𝟏𝟎𝐃𝐋𝐂 𝐑𝐞𝐠𝐢𝐬𝐭𝐫𝐚𝐭𝐢𝐨𝐧 & 𝐂𝐨𝐦𝐩𝐥𝐢𝐚𝐧𝐜𝐞 – I handle your TCR brand & campaign registration to prevent SMS filtering and ensure carrier approval. ✅ 𝗧𝗖𝗥 𝗔𝘂𝘁𝗵𝗲𝗻𝘁𝗶𝗰𝗮𝘁𝗶𝗼𝗻+ 𝗩𝗲𝗿𝗶𝗳𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝗔𝘀𝘀𝗶𝘀𝘁𝗮𝗻𝗰𝗲 – Get approved quickly with my step-by-step guidance. ✅ 𝗧𝗿𝗼𝘂𝗯𝗹𝗲𝘀𝗵𝗼𝗼𝘁𝗶𝗻𝗴 𝗦𝗠𝗦 𝗖𝗮𝗺𝗽𝗮𝗶𝗴𝗻 𝗥𝗲𝗷𝗲𝗰𝘁𝗶𝗼𝗻𝘀 – I resolve A2P 10DLC rejections and compliance issues. ✅𝗧𝘄𝗶𝗹𝗶𝗼, 𝗚𝗼𝗛𝗶𝗴𝗵𝗟𝗲𝘃𝗲𝗹 & 𝗘𝗻𝗴𝗮𝗴𝗲𝗕𝗮𝘆 𝗦𝗠𝗦 𝗦𝗲𝘁𝘂𝗽 – I integrate SMS marketing with your CRM and automation platforms. ✅ 𝐀𝐯𝐨𝐢𝐝𝐢𝐧𝐠 𝐒𝐌𝐒 𝐅𝐢𝐥𝐭𝐞𝐫𝐢𝐧𝐠 & 𝐌𝐞𝐬𝐬𝐚𝐠𝐞 𝐃𝐞𝐥𝐢𝐯𝐞𝐫𝐚𝐛𝐢𝐥𝐢𝐭𝐲 𝐈𝐬𝐬𝐮𝐞𝐬– I optimize messages to ensure high open and response rates. 📈 Results You Can Expect: ✔ Seamless A2P 10DLC registration with minimal delays. ✔ Increased SMS deliverability & engagement rates. ✔ A compliant and professional SMS marketing setup. ✔ Higher ROI from SMS campaigns. 💡 Bonus Services: ✅ Website Redesign for A2P Compliance – Optimize your website with opt-in forms, clear T&Cs, and a trust-building design. ✅ Custom Integrations & API Development – Enhance your SMS workflows with custom automation & API integrations. 🚀 Let’s Get Started! Facing A2P 10DLC or TCR compliance issues? Let’s fix them today! 📩 Click the "Send a Message" button, and let's get your SMS campaigns approved.

👋 Hi, I’m Sahil- a Twilio expert with over 11+ years of hands-on experience building scalable, real-time communication systems using the full Twilio stack and AI-powered tools. 📞 Programmable Voice / SMS, 🧠 TaskRouter & Flex, 🎛️ Studio, Functions, Conversations, Sync, Webhooks and more. I design and implement AI-powered calling platforms, autonomous voice agents, conversational IVR systems, SMS and WhatsApp automation, and cloud contact centers. My work focuses on reliability, low latency, and real-world scalability for high-volume production environments. My core expertise includes Twilio Programmable Voice, SIP, Asterisk, FreeSWITCH, WebRTC, and AWS Connect. I build advanced call flows with features such as call recording, real-time transcription, sentiment analysis, intelligent routing, and live analytics. I specialize in AI-driven voice systems, including outbound and inbound AI calling, agent assist, call summarization, intent detection, and conversational call handling using modern AI frameworks integrated with telephony platforms. On the messaging side, I build compliant SMS and WhatsApp automation systems, including A2P 10DLC workflows, notifications, chatbots, and CRM-integrated messaging pipelines. I also design and customize cloud contact centers using AWS Connect and Twilio Flex, including omnichannel routing, agent dashboards, reporting, and migrations from legacy PBX or call center systems. My technical stack includes Node.js, PHP, Laravel, React, Next.js, JavaScript, MySQL, Firebase, Linux, REST APIs, SIP, and WebRTC. Clients work with me to build AI voice agents, automate call centers, scale VoIP infrastructure, and integrate voice and messaging into SaaS products and internal systems. I prioritize clear communication, clean architecture, and long-term maintainability. Thank you

I specialize in Twilio development, including Twilio Functions, Twilio Studio Flow, and TwiML. I have extensive experience building SMS, Voice, IVR systems, call automation, and API integrations using Twilio. With 8 years of experience in automation and API integrations, I develop custom solutions that help businesses automate communication and streamline their workflows using Twilio. Specializations: 💬 𝐓𝐰𝐢𝐥𝐢𝐨 𝐒𝐌𝐒 & 𝐌𝐌𝐒 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 Sending transactional and bulk SMS/MMS using Twilio APIs with delivery tracking and automation. 💬 𝐓𝐰𝐢𝐥𝐢𝐨 𝐖𝐡𝐚𝐭𝐬𝐀𝐩𝐩 𝐁𝐮𝐬𝐢𝐧𝐞𝐬𝐬 𝐀𝐏𝐈 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 WhatsApp messaging automation, template messaging, and CRM integrations using Twilio WhatsApp API. 📞 𝐓𝐰𝐢𝐥𝐢𝐨 𝐕𝐨𝐢𝐜𝐞 𝐀𝐏𝐈 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 Custom voice calling applications including inbound/outbound calls, call routing, and automation. 📲 𝐈𝐕𝐑 𝐂𝐚𝐥𝐥 𝐅𝐥𝐨𝐰 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 Advanced IVR systems with DTMF input, call routing, business hour logic, voicemail, and callback features. ☎️ 𝐓𝐰𝐢𝐥𝐢𝐨 𝐀𝐈 𝐀𝐠𝐞𝐧𝐭 & 𝐂𝐨𝐧𝐯𝐞𝐫𝐬𝐚𝐭𝐢𝐨𝐧𝐚𝐥 𝐀𝐈 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 Building AI-powered voice and messaging agents using Twilio integrated with AI models to automate customer conversations, lead qualification, smart responses, and support across voice, SMS, and WhatsApp channels. ⚙️ 𝐓𝐰𝐢𝐥𝐢𝐨 𝐒𝐭𝐮𝐝𝐢𝐨 𝐖𝐨𝐫𝐤𝐟𝐥𝐨𝐰 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧 Designing and implementing automated communication workflows using Twilio Studio. ⚙️ 𝐓𝐰𝐢𝐥𝐢𝐨 𝐒𝐈𝐏 𝐓𝐫𝐮𝐧𝐤 𝐂𝐨𝐧𝐟𝐢𝐠𝐮𝐫𝐚𝐭𝐢𝐨𝐧 Setup and configuration of Twilio Elastic SIP Trunks for VoIP systems and PBX integrations. 𝐓𝐰𝐢𝐥𝐢𝐨 𝐒𝐈𝐏 𝐃𝐨𝐦𝐚𝐢𝐧 𝐒𝐞𝐭𝐮𝐩 Configuration of SIP domains for secure voice communication and softphone connectivity. 𝐓𝐰𝐢𝐥𝐢𝐨 𝐅𝐥𝐞𝐱 𝐂𝐨𝐧𝐭𝐚𝐜𝐭 𝐂𝐞𝐧𝐭𝐞𝐫 𝐈𝐦𝐩𝐥𝐞𝐦𝐞𝐧𝐭𝐚𝐭𝐢𝐨𝐧 Deployment and customization of Twilio Flex for cloud-based contact center solutions. 𝐂𝐨𝐧𝐟𝐞𝐫𝐞𝐧𝐜𝐞 𝐂𝐚𝐥𝐥𝐢𝐧𝐠 & 𝐂𝐚𝐥𝐥 𝐌𝐞𝐫𝐠𝐞 𝐒𝐲𝐬𝐭𝐞𝐦𝐬 Building conference call systems with participant management and call merge functionality. 🔔 𝐂𝐚𝐥𝐥 𝐑𝐞𝐜𝐨𝐫𝐝𝐢𝐧𝐠 & 𝐓𝐫𝐚𝐧𝐬𝐜𝐫𝐢𝐩𝐭𝐢𝐨𝐧 Call recording implementation with transcription and storage for compliance and analytics. 𝐓𝐰𝐢𝐥𝐢𝐨 𝐖𝐞𝐛𝐡𝐨𝐨𝐤𝐬 𝐮𝐬𝐢𝐧𝐠 𝐏𝐇𝐏 Developing webhook endpoints to handle Twilio events, calls, and messaging workflows. 𝐀𝟐𝐏 𝟏𝟎𝐃𝐋𝐂 𝐑𝐞𝐠𝐢𝐬𝐭𝐫𝐚𝐭𝐢𝐨𝐧 & 𝐂𝐚𝐦𝐩𝐚𝐢𝐠𝐧 𝐒𝐞𝐭𝐮𝐩 Complete setup of brand registration, campaign approval, and compliance for US messaging. 𝐂𝐑𝐌 & 𝐀𝐏𝐈 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧𝐬 Integration of Twilio with CRM platforms like HubSpot, Zoho, Pipedrive, and custom APIs. Why doing API integrations? By doing software integrations, you automate your business saving thousands of dollars on monthly expenses. My experience brings to your operation less total cost. Looking forward to connect. Thanks Anil