Hire the Best VOIP Software Engineers

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

👋 Hi, I’m Oleksii - a Twilio expert with over 7 years of hands-on experience building scalable, real-time communication systems using the full Twilio stack: 📞 Programmable Voice / SMS, 🧠 TaskRouter & Flex, 🎛️ Studio, Functions, Conversations, Sync, Webhooks and more. I’ve successfully completed 120+ Twilio projects on Upwork, including: • Eliminating latency issues in phone calls 🔧 • Creating SMS marketing automation pipelines 📲 • Developing full-scale Flex dashboards with custom workflows 🧩 Clients describe me as: “Very skilled, excellent communicator, smart guy and a pleasure to deal with.” “Oleksii was very helpful and available :) We no longer have problems with latency during our phone calls.” 🛠 Whether you need help with: • Twilio Studio call flows • Complex webhook-based automation • TwiML, IVR, call forwarding setups • Integrating Twilio with CRMs or internal systems • Building voice/SMS logic in Node.js, Laravel, or Firebase environments …I’ve got you covered. Let’s bring your Twilio-powered solution to life 🚀 Feel free to invite me to your job or message me with questions.

I help businesses build, optimize, and manage enterprise-grade contact center solutions using RingCentral and NICE CXone. With 8,000+ hours worked and $100K+ earned on Upwork, I specialize in designing reliable IVR systems, intelligent call flows, routing logic, and customer support automation for both small businesses and large enterprises. What I Can Help You With: ✔ RingCentral UCaaS & CCaaS setup and administration ✔ NICE CXone / InContact development and support ✔ IVR and call flow design ✔ Studio scripting and automation ✔ Omnichannel customer support solutions ✔ API integrations and workflow automation ✔ Technical troubleshooting and platform support ✔ Contact center optimization and reporting ✔ Post-implementation support, maintenance, and system optimization Why Clients Work With Me: ✔ Certified and experienced contact center engineer ✔ Strong communication and project ownership ✔ Fast problem-solving and reliable delivery ✔ Able to manage projects from planning to deployment ✔ Ongoing support available after implementation I focus on building scalable, user-friendly customer experience solutions that improve efficiency and customer satisfaction. Let’s discuss how I can help your business.

I build, scale and rescue production VoIP and Voice AI platforms. For over 15 years, I've been designing SIP, WebRTC and real-time communication systems built on FreeSWITCH, OpenSIPS, Asterisk and related technologies. My experience ranges from troubleshooting complex SIP and media issues to designing multi-tenant communication platforms, AI-powered voice systems and carrier-grade telephony infrastructure. I can help with: • AI Voice Agents and Voice AI Platforms • OpenAI Realtime, Gemini Live, Deepgram, ElevenLabs, RetellAI • FreeSWITCH and Asterisk development • OpenSIPS and Kamailio SIP routing • SIP trunking and carrier integrations • WebRTC platforms and browser telephony • RTP, NAT traversal and media troubleshooting • SBC design and deployment • Contact center and call center solutions • Twilio, Telnyx and CPaaS integrations • Production incident investigation and VoIP troubleshooting • Telephony migrations and system modernization My technical background includes: • VoIP: SIP, RTP, WebRTC, FreeSWITCH, OpenSIPS, Kamailio, Asterisk, Jambonz, Drachtio, Twilio, Telnyx • Backend Development: Node.js, TypeScript, Python, Go, C • Databases: PostgreSQL, MySQL, MongoDB, Redis • Messaging: RabbitMQ, AWS SQS • Cloud & Infrastructure: AWS, GCP, Docker, Kubernetes, Linux, CI/CD • Monitoring: Prometheus, Grafana, ELK Stack Recent projects include: • AI-powered voice agents integrated with telephony platforms • SIP and WebRTC infrastructures handling production traffic • Multi-tenant communication platforms for SaaS products • Carrier integrations and custom call routing solutions • Real-time communication systems built on FreeSWITCH, OpenSIPS and cloud-native infrastructure Whether you need to build a new platform, migrate an existing system, integrate Voice AI capabilities or resolve complex SIP/WebRTC issues, I can help deliver a reliable production-ready solution.

✅ 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

Helped businesses deploy Microsoft Teams Phone, Genesys Cloud CX, SIP Trunks, and AudioCodes SBC solutions, reducing telephony issues and improving call reliability for contact centers and enterprise environments. Specialized in Microsoft Teams Phone, Genesys Cloud CX, SIP Trunking, and AudioCodes SBC with experience delivering cloud voice and contact center solutions for SMB and enterprise customers. 🔹 Microsoft Teams & Voice Solutions ✔️ Microsoft Teams Direct Routing ✔️ Operator Connect & Calling Plans ✔️ Auto Attendants & Call Queues ✔️ PSTN Integration & SBC Configuration ✔️ Multi-provider SIP failover routing 🔹 VoIP & Contact Center Expertise ✔️ SIP, E1, PRI integrations ✔️ AudioCodes SBC configuration & troubleshooting ✔️ Genesys Cloud CX (BYOCC, SIP Trunks, Routing) ✔️ Call recording & voice security ✔️ VoIP troubleshooting (RTP, TLS, SRTP, QoS) 🔹 Cloud & Infrastructure ✔️ AWS & Azure deployments ✔️ Hybrid cloud architecture ✔️ VPNs, Firewalls, Load Balancers ✔️ DNS, SPF, DKIM, DMARC & Email deliverability ✔️ High-availability & secure network design