Hire the Best FreePBX Specialists in Delhi, IN

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Pankaj K.

Delhi, India

$45/hr
4.9
116 jobs

Full-Stack Platform Architect & Devloper | VOIP, AI Voice, SaaS, API, & DevOps | 18Yrs I help startups, Individual/Small Firms, CCaaS, enterprises, and SaaS Firms 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

  • FreePBX
  • VoIP Software
  • VoIP Administration
  • Solution Architecture
  • VoIP PBX
  • FreeSWITCH
  • CRM Automation
  • CRM Development
  • Zoho CRM
  • Asterisk
  • VICIDIAL
  • PBX
  • Call Center Software
  • Full-Stack Development
  • AI App Development
  • Docker
  • NestJS
  • OpenAI Codex
  • Claude
  • Cursor
Abhishek kumar K.

Delhi, India

$40/hr
4.8
51 jobs

1) Free PBX Expert (Installation, Development, Configuration, Technical Support). 2) Fusion PBX Expert (Installation, Development, Configuration, Technical Support) 3) Asterisk Expert (Installation, Development, Configuration, Technical Support). 4) Vicidial Expert (Installation, Development, Configuration, Technical Support). 5) Go Auto Dial Expert (Installation, Development, Configuration, Technical Support). 6) Fop2 Expert (Installation, Development, Configuration, Technical Support). 7) VOIP Expert. 8) IVRS (Design, Development, Configuration, Technical Support). 9) Linux, Mysql Database Expert. 10) Lua Expert. 11) PHP, Mysql, Perl expertise. 12) Rabbit MQ, Redis, Ha proxy Expertise. 13) Freeswitch (Development, Support, Installation) 14) AI / Voice Bot Expert using unimrcp. 15) Opensip Expert 16) RTP Engine Projects Handel: 1) IPPBX. 2) Contact Center Solution. 3) SoftSwitch. 4) Autodialer/ Voice Broad Casting System/ Call Back System/Calling Card System. 5) IVRS/Voice Mail /Conference Solution. 6) Voice & SMS Broadcasting System. 7) VOIP Billing Solution. 8) PRI / ISDN/ GSM gateway Integration expert. 10) Solution Design Expert. 11) Architecture Expert. 12) Cloud / On-premises PBX/ contact center / Soft switch Deployment expert.

  • FreePBX
  • Asterisk
  • FreeSWITCH
  • VoIP Administration
  • Session Initiation Protocol
  • OpenSIPS
  • PHP
  • VICIDIAL
  • MySQL
  • Linux System Administration
Nishi J.

Delhi, India

$17/hr
4.6
12 jobs

I build real-time communication systems, AI agents, and telecom platforms including Asterisk, FreeSWITCH, CCaaS, CPaaS, AI voice bots, and LLM-powered automation systems. My work focuses on production-grade backend + real-time + AI + telecom integration, not just UI development. I have built systems such as: VOIP IPPBX / Multi-tenant VOIP IP PBX platforms Contact Center / CCaaS / UCaaS systems/VOIP Auto Dialer/ Predictive Dialer AI Voice Agents (STT + LLM + TTS) SAAS system with API , backend and Mobile app development CPaaS platforms (API driven calling / SMS / WebRTC) Autonomous AI workflows using MCP / tools / agents Real-time dashboards and execution pipelines Distributed backend systems with Redis / Postgres / queues AI automation using OpenAI / Claude / local LLM / VAPI / ElevenLabs Embedded / device-based telecom software High-concurrency Node.js / Python services Core Expertise Telecom / VoIP / Real-time Asterisk FreeSWITCH SIP / WebRTC / RTP CCaaS / UCaaS / CPaaS Contact Center systems Twilio / Plivo / VAPI.ai Call routing / IVR / recording / queues AI voice bots AI / LLM / Agents / MCP AI Agents / tool calling MCP servers / orchestration Prompt engineering Conversation AI OpenAI / Claude / local LLM ElevenLabs / TTS / STT Autonomous workflows Cursor / OpenCodex / Claude Code Backend / Realtime / Infra Node.js / TypeScript Python / FastAPI / Flask WebSocket / SSE / queues Redis / PostgreSQL Docker / Linux / deployment Event-driven architecture Frontend Next.js React.js Vue.js Admin dashboards Real-time UI What I usually build ✔ AI Voice Agent platforms ✔ Power Dialer/Preview Dialer/Predictive Dialer End to end Implementation ✔ IPPBX / Contact Center ✔ AI automation systems ✔ CPaaS / CCaaS platforms ✔ Real-time control APIs ✔ Trading / execution / telemetry systems ✔ MCP / Agent / LLM tools ✔ Multi-tenant backend platforms ✔ High-performance Node / Python apps Why clients hire me - I work across full stack + infra + AI + telecom - we have implemented end to Power Dialer - I can build from scratch to production - Strong debugging skills - Experience with complex systems - Fast execution - Long-term support - Portfolio / demos available AI systems / MCP / telecom / real-time backend demos available on request.

  • FreeSWITCH
  • Asterisk
  • Node.js
  • Python
  • WebRTC
  • AI Product Management
  • OpenAI API
  • AI Chatbot
  • Prompt Engineering
  • VoIP
  • OpenSIPS
  • Twilio API
  • VoIP PBX
  • IVR Software
  • Docker
  • FastAPI
  • OBS Studio
  • VoIP Software
  • VoIP Administration
  • VICIDIAL

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