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I am VoIP/VICIDIAL/VICIBOX/Asterisk/FreePBX/GoAutodial/vTiger/3CX developer and solution provider with past 16+ years of rich experience. I have expertise in them, and so i am confident to serve you for the same. I have rich telecom, web and custom software development and support experience. I'm interested in your job & I guarantee doing it in short time. I didn’t ask for an upfront as I'm interested in building long term relationships based on trust because I'm confident with my quality of work.

I am a VoIP and cloud technologies expert with over 12 years of experience specializing in Asterisk, FreePBX, Issabel, WebRTC, and cloud deployments. I have successfully implemented, customized, and optimized PBX systems and real-time communication solutions for businesses of all sizes. Whether it’s configuring a robust VoIP infrastructure, integrating WebRTC, or deploying PBX systems on the cloud, I deliver reliable and scalable solutions tailored to client needs. I am committed to providing high-quality work and timely results. I look forward to contributing to the success of your project. Best regards, Devendra Soni Asterisk | FreePBX | VoIP | WebRTC | Cloud Specialist

I help businesses build reliable, scalable communication systems and web applications by combining deep expertise in VoIP (3CX & Yeastar) with full-stack development and API integrations. With 6+ years of experience in 3CX, hands-on expertise in Yeastar Cloud PBX, and 3+ years in full-stack development, I specialize in delivering end-to-end solutions — from telephony infrastructure to CRM integrations and custom dashboards. 🔥 What I Can Do For You ☎️ VoIP & PBX Solutions (3CX + Yeastar) 3CX setup, configuration & troubleshooting (V18/V20) Yeastar Cloud PBX deployment & management SIP Trunk integration (Twilio, Telnyx, Flowroute, etc.) IVR, Call Queues, Ring Groups, Call Routing Predictive / Progressive Dialer setup Call recording, reporting & analytics Multi-tenant PBX architecture DID management & call flow optimization 💻 Full Stack Development Backend: PHP, Node.js, Golang Frontend: JavaScript, HTML, CSS, Bootstrap, Tailwind Database: MySQL, PostgreSQL Build scalable CRM systems & dashboards WebRTC / SIP dialer development Real-time systems & automation workflows 🔗 API Development & Integrations (Swagger/OpenAPI) REST API design & development Swagger/OpenAPI documentation CRM integrations (Zoho, Salesforce, Monday, etc.) Webhooks, automation, and data sync systems 🌐 WordPress Development Custom theme & plugin development Website optimization & speed improvements API integrations with WordPress Business websites & landing pages 💡 Why Clients Choose Me ✔ 6+ years in VoIP & telephony systems ✔ Strong backend + infrastructure understanding ✔ Fast troubleshooting & problem-solving ✔ Clean, scalable, production-ready solutions ✔ Excellent communication & long-term support 📌 Recent Work Highlights Built multi-company 3CX dialer system with CRM integration Deployed Yeastar Cloud PBX for international clients Developed VoIP analytics dashboards & call tracking systems Integrated Twilio / Telnyx with custom applications Created API-driven automation workflows using webhooks 🎯 Let’s Work Together If you need help with: Setting up or fixing your 3CX / Yeastar PBX Building a custom dialer or VoIP system Integrating APIs or CRM systems Developing a scalable web application 👉 Send me a message — I’ll provide a clear solution quickly.

Principal Full-Stack Platform Architect | Telecom, AI Voice, SaaS & Cloud I help startups, telecom providers, BPOs, enterprises, and SaaS companies design, build, deploy, and scale production-ready software platforms. With 20+ years of engineering experience and 90+ successful Upwork projects, I take complete ownership of the engineering lifecycle from solution architecture and UI/UX implementation to backend services, APIs, AI integration, telecom infrastructure, DevOps, cloud deployment, documentation, and long-term production support. Unlike specialists who only focus on one layer of the stack, I build complete business platforms that are scalable, maintainable, secure, and production ready. Whether you need a communication platform, AI Voice Agent, SaaS application, customer portal, enterprise dashboard, workflow automation, or cloud-native backend, I can architect and deliver the complete solution. What I Build Enterprise SaaS Platforms I design and develop complete SaaS products including: Multi-tenant SaaS applications Customer portals Admin dashboards CRM & ERP platforms Contact Center (CCaaS) Hosted PBX & UCaaS Workflow automation platforms AI-powered business applications Internal enterprise systems From MVP to enterprise-scale production deployments. Full-Stack Software Development I provide complete product engineering across frontend, backend, APIs, databases, cloud infrastructure, and production deployment. Frontend: React Next.js Vue.js TypeScript Tailwind CSS Material UI Responsive Web Applications Progressive Web Apps (PWA) Mobile-first UI Backend: Node.js NestJS Python FastAPI Django Laravel Go PHP Database PostgreSQL MongoDB MySQL Redis API Development REST APIs GraphQL WebSockets OpenAPI / Swagger OAuth JWT MCP Servers Webhooks Third-party integrations AI Engineering & Intelligent Automation I help businesses integrate AI into production systems—not just prototypes. I build: AI Voice Agents AI Receptionists AI Customer Support AI IVR Systems RAG Applications Agentic AI Systems Knowledge Assistants Internal AI Platforms AI Workflow Automation AI Document Processing AI Search Platforms AI Technologies OpenAI Claude Gemini Deepgram ElevenLabs LiveKit LangChain LangGraph MCP Prompt Engineering Model Optimization Vector Databases Realtime Voice APIs Telecom & Communication Platforms Telecom remains one of my strongest engineering specialties. I build complete communication platforms not just PBX installations. Technologies FreeSWITCH Asterisk FusionPBX FreePBX VICIdial SIP RTP WebRTC SIP.js ESL AGI AMI ARI Services Multi-tenant PBX Hosted PBX Contact Center (CCaaS) UCaaS AI Voice Platforms Softphones Predictive Dialers Progressive Dialers Call Recording Call Analytics IVR Development Queue Management DID Provisioning Carrier Integration SBC Integration Telecom Billing White-label Telecom Platforms Cloud Infrastructure & DevOps I deploy highly available production environments. Infrastructure Linux Docker Kubernetes Terraform Nginx HAProxy AWS Azure Google Cloud DevOps CI/CD Pipelines GitHub Actions GitLab CI Containerization Monitoring Logging Auto Scaling Production Deployment Release Management Monitoring Prometheus Grafana Loki Alerting Health Checks Performance Optimization Architecture & Technical Leadership I frequently work as a technical lead and solution architect. Services include: Solution Architecture Software Architecture System Design Database Design API Architecture Microservices Event-driven Architecture Multi-tenant Architecture High Availability Disaster Recovery Security Architecture Performance Optimization Documentation & Project Delivery Beyond engineering, I help clients organize and successfully deliver projects. I prepare: Software Architecture Documents Technical Design Documents API Documentation Swagger / OpenAPI Specifications Statements of Work (SOW) Functional Specifications BRD PRD Deployment Guides Infrastructure Documentation QA Plans Technical Proposals Project Estimates Delivery Roadmaps I also work comfortably with: Jira ClickUp Trello Azure DevOps GitHub Projects Linear Confluence Notion Recent Projects Enterprise Multi-tenant CCaaS Platform AI Voice Agent using OpenAI Realtime API Telecom ERP Platform Hosted PBX Platform FusionPBX Custom Development FreeSWITCH Call Routing Engine Enterprise AI Knowledge Platform AI Workflow Automation CRM Integrations Telecom Billing Platform WebRTC Calling Platform Call Center Analytics Dashboard Healthcare Communication Platform Law Firm AI Automation Customer Support Automation Platform Why Clients Hire Me ✔ 20+ years of software engineering experience ✔ 90+ successful Upwork projects ✔ End-to-end ownership from architecture to production ✔ Full-stack development across frontend, backend, APIs, databases, AI, and cloud infrastructure ✔ Deep expertise in FreeSWITCH, Asterisk, FusionPBX, SIP, WebRTC, CCaaS, and UCaaS ✔ Production AI engineering using OpenAI, Claude, Gemini, LangChain, Lang

Hi Guest, First of all, thanks for visiting our profile. I am doing freelancing since 2010 and my expertise on complete VoIP solution including Freeswitch, Asterisk, PJSip, Opensips and Kamailio. I just recently launched a company which is not offering only VoIP solution but Zeus in Web Development(PHP, WordPress etc), Mobile App Development(Android & iOS). We are a team of members having extensive knowledge of all the services we are offering. We have successfully completed many projects delivered competent results with 100% accuracy with lifetime free support. To keep in mind 100% availability, Our dedicated manager is always online to make sure our client will face no more difficult to ask any query at any time. Let me mentioned the technologies which are our core strength listed below: - Development of Linphone Mobile VoIP Diallers - Development of PJSIP Mobile VoIP Diallers - Installation, development, customization, and maintenance of Asterisk,FreeSwitch Switch,Kamalio and OpenSIPs Servers - Android app development - iOS app development - Flutter Cross Platform App Development - Electron App Development - Web application development - ReactJS and ReactNative development for web and mobile applications - Testing and bug fixing for existing applications Consulting for ongoing projects Project consulting for Android, iOS, ReactJS, Asterisk, FreeSwitch, OpenSIPs, Kamailio, ASTPP, RTPengine, MediaProxy, RTPproxy, FreePBX, and A2Billing Expertise in developing Flutter WebRTC applications Expertise in developing ReactNative WebRTC applications Our price is very reasonable which allows us to work with us. Please share your requirement today only with us to check our capabilities to take your experience on the next level. To name a few tools & technologies that I have worked on: • High-level languages: C++, Objective C, Java, Python, PHP • IDEs: Xcode, Android Studio, Eclipse • Version Control & CI: SVN, Git, Perforce, Bitbucket, Jenkins • DBMS: MS SQL, MySQL, Oracle, PostgreSQL, MongoDB • Frameworks: Django, Zend, Magento, Django REST • Management tools: VersionOne, Jira, Trac, MS Project, MS Visio, XMind, Bugzilla, Balsamiq • Amazon Web Services (AWS) - EC2, S3, SQS, SNS, RDS, CloudTrail, Cloudfront

Having 18 Years of experience managing, supporting and developing IVR Solution using asterisk, FreePBX, Vicidial, Issabel and IncrediblePBX, supporting Telecom and ITES for worldwide customers Have a expertise in FreePBX, Vicidial, Issabel, IncrediblePBX, Nagios, Asterisk, A2billing, GoAutoDial, Centos, Ubuntu, MySql, VoIP, SIPML5 , FOP2, SSL Certificate, Nginx,Redmine Ticketing Tools,Kamailio