Hire the Best PhoneGap Developers
in Bangladesh

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.

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.

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.

I'm a VoIP, Network & Security Engineer with over 10 years of hands-on experience building, managing, and securing enterprise and carrier-grade infrastructure. I've worked in the core network of one of Bangladesh's largest ISPs — designing solutions that handle real scale, real traffic, and real uptime requirements. I specialize in the full range of VoIP platforms — from SMB-focused systems like 3CX and FreePBX to carrier-grade switching and billing platforms including PortaOne (PortaSwitch, PortaBilling) and Telinta (TeliCore). If you're a VoIP provider, MVNO, or wholesale carrier needing a scalable multi-tenant platform, class-5 softswitch, or prepaid/postpaid billing setup, I can help you design, deploy, and maintain it. I also provide full US telecom regulatory compliance support — including STIR/SHAKEN implementation for call authentication and 10DLC (10-Digit Long Code) registration for A2P SMS campaigns. Whether you're a CPaaS provider, VoIP operator, or business needing compliant SMS messaging, I handle brand registration, campaign vetting, TCR submission, and carrier approval — keeping you out of filtering and in line with FCC and CTIA requirements. Beyond voice, my expertise covers the full network stack: BGP/OSPF routing, MPLS, firewall hardening with Fortigate and Sophos, IPsec/GRE VPNs, and cloud deployments on AWS and Azure. What you can expect: clear communication, documented deliverables, and no surprises. I scope projects carefully, flag issues early, and stay available through go-live and beyond. Telecom platform support: PortaOne (PortaSwitch · PortaBilling · PortaSIP) · Telinta (TeliCore softswitch · hosted VoIP · calling card billing) · FusionPBX · Asterisk · FreePBX · 3CX — from initial provisioning and trunk configuration to billing plan setup, DID routing, and ongoing admin. Regulatory & compliance: STIR/SHAKEN (SHAKEN attestation, STI-CA enrollment, signed calls) · 10DLC A2P SMS (TCR brand & campaign registration, carrier vetting, CSP setup) · FCC telecom compliance · SIP fraud prevention · call authentication best practices.

With 19+ years of hands-on experience, I help businesses reduce infrastructure risk and improve system reliability by designing, securing, and maintaining production-grade Linux environments, blockchain and crypto exchange systems, and automated trading solutions. I also specialize in building and supporting scalable SMS and VoIP infrastructure using Telnyx, Twilio, and VoIP.ms, engineered for stability, performance, and long-term operational reliability. Upwork Client's feedback: "A complete expert in Linux. Very collaborative freelancer." "Honest and reliable freelancer. A joy to work with." "Good and hardworking worker. Very honest as well." "Highly skilled Linux engineer, with a deep understanding of the ins and out of drivers and the essence of the OS" With extensive hands-on experience delivering mission-critical infrastructure, I focus on stable systems, fast troubleshooting, and enterprise-grade execution. Let’s discuss your requirements on upwork and define the right technical solution for your project.

Qualified and competent software engineer with at least Five years of consistent involvement in the services and information technology domains. Skilled in Flutter cross-platform iOS and Android Mobile Apps Design & Development, Asterisk, IP Telephony System, Core Network, VoIP, SoftSwitch, VAS Application, SIP, IPPBX, Cisco IP Phone, CRM, Web Application Development, Website Design & Development, Linux, Python, Linux Shell Scripting, PHP, MySQL, Databases, Architectural Design, and IoT. Possessed a desire to pursue excellence via diligence and a patient demeanor. Always have a strong keen to work with challenging and problem-solving engaging technology projects.