AI Agents & Automation
Tool-using agents, multi-step workflows, CRM/ERP actions, API integrations and human-in-the-loop approvals.
Production AI + Real-Time + Business Software
AI agents, voice systems & production SaaS architecture.
UnifiedPBX is the engineering practice of Pankaj Joshi, Solution Architect & Product Engineer. I design and build production systems across AI agents, RAG, AI Voice, FreeSWITCH, Asterisk, WebRTC, CCaaS, CPaaS, UCaaS, custom CRM/ERP and multi-tenant SaaS.
20+ yrsEngineering experience
90+ Upwork projects
15+Public case studies
45Working system demos
AI Engineering
AI that operates inside the business.
Build AI systems that connect enterprise knowledge, CRM/ERP data, communications and workflows — with tools, retrieval, guardrails and human escalation instead of a chatbot bolted onto the side.
RAG & Knowledge Systems
Enterprise retrieval, document intelligence, knowledge graphs and AI-ready operational data.
Private & Production AI
Private AI architectures, model routing, observability, cost controls, retries and production guardrails.
AI Voice Agents
Conversational voice connected to real telephony, STT/TTS, LLM tools, CRM workflows and human transfer.
AI Call Center
Hybrid AI + human queues with real SIP trunks, agent routing, CRM write-back and auditable call flows.
AI Workflow Automation
Connect AI to CRM, ERP, WhatsApp, voice and business APIs with deterministic automation around the model.
Telecom & Real-Time
Deep SIP, media and communications engineering.
From carrier connectivity and RTP to browser calling and multi-tenant administration, the communication plane is designed as part of the product — not treated as an isolated PBX.
FreeSWITCH Development
Dialplans, Sofia profiles, gateways, ESL, directory sync, RTP/media, routing, IVR, queues and multi-tenant platforms.
Asterisk & FusionPBX
PJSIP, AMI/ARI, dialplans, extensions, trunks, IVR, recordings, queues and PBX application integration.
WebRTC Softphones
Browser calling, SIP.js, ICE/TURN, push, NAT traversal, click-to-call, hold, transfer and agent workspaces.
CCaaS / UCaaS / CPaaS
Tenant isolation, agents, campaigns, queues, recordings, number management, messaging and communications APIs.
Cloud PBX & Multi-Tenancy
Hosted PBX architecture with provisioning, RBAC, billing, white-label capabilities and tenant-safe data paths.
Production Rescue
Diagnose one-way audio, dead trunks, registration problems, WebRTC ICE failures, API timeouts and media-path faults.
Business Software & SaaS
From business workflow to production application.
Custom CRM / ERP
Design domain-specific systems for telecom, insurance, field service, operations, finance, inventory, HR and customer workflows.
- Multi-role dashboards and RBAC
- REST APIs, integrations and webhooks
- Workflow automation and reporting
- Telephony and communication embedded into the application
- Mobile and browser clients on a shared API
Full-Stack Product Engineering
Architecture and implementation across the complete application lifecycle.
Next.jsReactVue
NestJSNode.jsPython
FastAPILaravelPostgreSQL
RedisKafkaRabbitMQ
DockerKubernetesAWS
AzureGCPPrometheus
GrafanaOpenTelemetry
Selected Work
Real systems across AI, telecom and business domains.
Explore the full portfolio and technical case studies on UnifiedPBX.in.
Multi-Tenant IP PBX & UCaaS
Tenant-isolated administration, extensions, devices, provisioning and communications APIs with a WebRTC direction.
View architecture →FreeSWITCH CCaaS Platform
Multi-tenant PBX, queues, campaigns, agent workspace, FreeSWITCH synchronization and SIP.js browser calling.
View case study →Custom CRM + Telecom ERP
CRM, sales, inventory, purchasing, finance, telecom billing, HRMS and business workflows.
Explore projects →Insurance ERP + WebRTC Contact Center
Insurance workflows, agency/DSA tenancy and an agent desk with integrated calling.
View portfolio →Foliolytics
AI/data-oriented portfolio management platform for Indian share-market workflows, holdings and P&L analytics.
View project →SandeshX CPaaS
SMS and WhatsApp communication platform concepts around messaging, APIs, DLT and business workflows.
View project →Architecture Model
One engineering practice across the complete stack.
Business
CRM · ERP · Industry workflows · SaaS
Application
Next.js · React · NestJS · Python · Laravel
AI
LLMs · Agents · RAG · Knowledge Graphs · Automation
Real-Time
WebRTC · SIP · FreeSWITCH · Asterisk · IVR
Data & Events
PostgreSQL · Redis · Neo4j · Kafka · RabbitMQ · Webhooks
Production
Linux · Docker · Cloud · CI/CD · Prometheus · Grafana · OpenTelemetry
Work With Me
Have a telecom, AI or SaaS problem?
Share the business workflow, existing stack, constraints and desired outcome. I can help with architecture, implementation, migration, production rescue or long-term engineering.