Hire the Best PhoneGap Developers in Dhaka, BD

Need an AI voice agent that works with real callers, not just in a demo? I built a restaurant phone agent that handles thousands of calls daily and helped the product reach $50K+ ARR. Message me for a free 15-minute voice agent fit call. I build and troubleshoot production AI voice agents using Vapi, Retell AI, ElevenLabs, and Twilio. Clients typically hire me for: • AI receptionists and customer support agents • Appointment booking and reminder systems • Restaurant phone ordering • Lead qualification and outbound follow-up • Call routing, transfers, and human handoff • CRM, calendar, payment, database, and custom API integrations I can build your voice agent from scratch or fix an existing agent that sounds convincing in a demo but fails during real customer calls. I handle conversation design, prompt engineering, natural turn-taking, interruptions, barge-in, latency, function calling, structured data capture, transcripts, call analytics, retries, monitoring, and production error handling. I also test the situations that usually break voice agents, including callers changing their minds, giving incomplete information, speaking over the agent, requesting a human, or triggering an external API failure. Unlike developers who only configure the voice platform, I can build the complete product around the agent. That includes: • Python, FastAPI, and Node.js backends • Next.js dashboards and internal tools • Supabase and PostgreSQL databases • Authentication and user management • Stripe billing and subscriptions • Webhooks and background jobs • Third-party API integrations • Logging, monitoring, and call analytics I can also add AI chatbots, RAG systems, document question-answering, and shared agent logic across phone and web when the project requires both voice and chat. My focus is production reliability. The goal is not an agent that only works during a controlled demo. The goal is a maintainable system that performs reliably with real callers, real business data, and real integrations. You receive clean software your team can monitor, debug, and continue developing after handoff. Send me your use case, current setup, required integrations, and where the project is getting stuck. I will tell you what can be kept, what needs to be rebuilt, and the fastest path to a production-ready voice agent.

I am a VoIP & Voice AI Engineer with 6+ years of hands-on experience designing, deploying, integrating, troubleshooting, and maintaining production VoIP systems. I work across the complete voice infrastructure — from SIP signaling, RTP media and PBX routing to APIs, WebRTC and AI Voice Agents. 🔹 VoIP & PBX Engineering • Asterisk, FreePBX, Issabel and VICIdial • SIP trunks, DID and Caller ID configuration • Inbound and outbound call routing • IVR, queues, extensions and dialplans • Call center deployment and optimization • Linux-based VoIP server administration 🔹 VoIP Troubleshooting & Maintenance • One-way or no-audio problems • SIP registration failures • NAT, firewall, RTP and codec issues • Call drops and routing problems • SIP provider and trunk connectivity • Dialplan and PBX configuration issues • Production VoIP system maintenance 🔹 VoIP Application & API Integration • REST API and webhook integration • CRM, ERP and PBX integration • Asterisk ARI, AMI and application integration • Custom inbound and outbound call workflows • Python and PHP automation for VoIP systems • Twilio, Telnyx and other telephony API integrations • WebRTC and browser-based calling 🔹 AI Voice & Telephony I integrate AI Voice Agents with real telephony infrastructure and business APIs. I can help build solutions such as: • AI receptionists and customer-service agents • Appointment booking voice assistants • AI information and support hotlines • Automated outbound voice campaigns • API/tool calling from voice conversations • Human-agent transfer and fallback routing • AI-to-SIP/PSTN integration My professional work also includes VoIP/VAS application development, API integration, IP telephony infrastructure and production telecommunication systems. I do not only configure the application layer. I can troubleshoot the complete call path — SIP → PBX → RTP → API → WebRTC → AI Voice Agent. If you need help troubleshooting an existing VoIP system or building a new telephony or Voice AI solution, I can help you design, implement, integrate, troubleshoot and maintain it properly.

Asterisk | Kamailio | FreePBX | Big data | AWS |Azure |GCP | Linux | Unix | Ubuntu | Debian | Puppy | VoIP Expert | IBM Watson | Google API | A2Billing | WebRTC | PHP | JSP | MYSQL | Oracle|Ansible|Docker|Voice AI Chatbot|AI Agent Thanks for looking at my profile! I'm an IT Engineer offering more than 15 years of professional-level experience. I have deployed many Enterprise and Mid-Size Cloud, Network, and VoIP solutions worldwide. I am a professional Freelancer under a single roof with excellent communication skills, a fast learner, computer literate, can handle multitasking work and a very reliable contractor. Particularly interested in client/server and relational network design & develop using C/C++,Java,Php and C#. Always been interested in migration projects, as well as close interaction with the VoIP platform. I am always eager to provide quality work to my honorable clients. Hourly or fixed-price contract rates are negotiable depending on the work. I’m always working in a friendly environment so that we can make long-term business relationships, and feel honored to have a continuously growing list of happy clients with positive feedback on my work. I will do my best to satisfy my clients to the fullest. Do not hesitate to ask any questions you may have or discuss any ideas I may help you with. I am very easy to talk with.

I am an AI Systems Engineer with 6+ years of experience building real-time communication platforms, VoIP systems, and AI-powered voice solutions. I specialize in combining telephony infrastructure with modern AI technologies to create intelligent, scalable systems — including conversational IVR, voice bots, and automated call workflows. My expertise includes: • Asterisk, SIP/PJSIP, WebRTC, IVR systems • AI voice pipelines (STT → LLM → TTS) • Conversational AI & smart call routing • Backend systems, APIs, and CRM integrations • Cloud deployments (AWS, DigitalOcean, Linux) I have built and deployed production-grade systems used in enterprise and high-volume environments, focusing on performance, reliability, and scalability. I also actively use AI-assisted development tools (ChatGPT, Claude, etc.) to accelerate development, debug complex systems, and improve code quality.

22+ years in the telecommunications and Software industry from design, development, management, delivery, and lead. Vast experienced focused on solution customization for Cloud Telecommunication System. Specialist in Communication System like Core GSM, IP, SIP, WebRTC, SS7, Radius, Diameter, SMPP, XMPP, SNMP, Sockte, RabbitMQ Message Broker, Software Defined Radios (SDR), and IoT. Also capable to develop and deliver any communication-related solution.