Kamil S.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Aug 28, 2026.

Hi , With 8+ years of experience in VoIP engineering and telecom infrastructure, I help businesses build, customize, and scale reliable call center and communication platforms ranging from small business deployments to carrier-grade environments. I specialize in designing high-performance VoIP systems, advanced dialer solutions, telecom billing platforms, and cloud-based communication infrastructures that are secure, scalable, and cost-effective. ⭐️ What I Can Help You With 1. VoIP & PBX Solutions - Asterisk, FreePBX, FreeSWITCH, Elastix, Issabel, FusionPBX - 3CX, PBXware, VoIPOffice - SIP Trunking & Carrier Integrations - Multi-server VoIP architecture - High Availability (HA), clustering, failover, and load balancing - Security hardening and system optimization 2. VICIDial & Call Center Development - Complete Inbound, Outbound, and Blended Call Center Setup - VICIDial installation, customization, and troubleshooting - Custom campaign logic and workflow development - Agent interface redesign and UI/UX enhancements - Custom reports and dashboards - VICIBox multi-server clustering - Voice broadcasting and predictive dialing solutions 3. Asterisk Development - Advanced dialplan design - AGI scripting and custom applications - IVR development and automation - Call routing optimization - Conference solutions and WebRTC integrations - Custom webphone development 4. CRM & API Integrations - Twilio, Telnyx, SignalWire, Bandwidth, Plivo, VoIP.ms - CRM integrations and lead management systems - REST API development and automation - Webhook and real-time data synchronization - Third-party call transfer solutions - TrackDrive and custom lead posting integrations 5. Telecom Billing Platforms - A2Billing - ASTPP - VOS3000 - Magnus Billing ⭐️Services include: - Billing customization - CDR processing - Multi-tenant deployments - Reseller management systems - Callback and IVR customization 1. AI Voice Agents & Automation - ElevenLabs - Vapi - AI-powered voice assistants - Conversational AI integrations - Voice workflow automation 2. SMS Solutions - Bulk SMS platforms - SMS broadcasting systems - Two-way SMS applications - CSV-based bulk messaging portals - Twilio, Telnyx, SignalWire, Bandwidth, and VoIP.ms integrations ⭐️ Supported VoIP Providers Extensive experience integrating with major telecom carriers and providers, including: Twilio, Telnyx, SignalWire, VoIP.ms, Bandwidth, Flowroute, RingCentral, Nextiva, Plivo, Anveo, DIDLogic, IDT Express, SIP.US, Vitelity, Voxbeam, Telus, Nexmo, QuestBlue, Switch2VoIP, and many others. ⭐️ Why Clients Hire Me ✔️ 9+ Years of Specialized VoIP Experience ✔️ Deep Asterisk & VICIDial Source-Code Expertise ✔️ Carrier-Grade Deployments & Multi-Server Architectures ✔️ Strong API Integration & Automation Skills ✔️ Fast Troubleshooting & Performance Optimization ✔️ Reliable Communication & Long-Term Support Whether you need a new VoIP deployment, VICIDial customization, telecom billing platform, AI voice integration, or a complete call center solution, I can deliver a stable, scalable, and production-ready system tailored to your business needs. Le'ts have a chat !