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10+ years of professional experience in the Cloud and ISP industry. Certification: 🥇 Certified Kubernetes Administrator (CKA) 🥇 Red Hat Certified Engineer (RHCE) 🥇 Red Hat Certified System Administrator (RHCSA) 🥇 Red Hat Certified Specialist in Virtualization (RHCVA) Skills and Specialties: # OpenStack, Proxmox, KVM, Docker, Kubernetes, AWS. # Ceph, TrueNAS, ZFS, GlusterFS, iSCSI, NFS. # Email Server, Web Server, DNS Server, cPanel/WHM, NMS, etc. # Asterisk, FreePBX, Vicidial, FusionPBX, Voice Gateway, SS7 Media Gateway.

Are you struggling with VoIP system issues, telecom compliance, or PBX deployment? With 10+ years of hands-on experience, I deliver end-to-end VoIP engineering and telecom compliance solutions that keep your business running and compliant. I specialize in: 🔧 VoIP Platform Expertise • 3CX (Advanced Certified) — design, deployment, migration, troubleshooting • FreePBX / Asterisk / Issabel / Elastix • FusionPBX / FreeSWITCH • PortaOne / PortaSwitch / Telinta • Grandstream UCM series • Yeastar S & P Series 📋 Telecom Compliance (Rare Specialty) • STIR/SHAKEN implementation & attestation • FCC Form 499 filing • OCN registration & filing • Robocall mitigation compliance 🌐 Network & Infrastructure • SIP trunk provisioning (Twilio, Bandwidth, Telnyx, VoIP.ms) • Fortigate, Sophos, SonicWall firewall configuration • QoS & VLAN setup for voice traffic • E911 configuration • Endpoint provisioning (Cisco, Poly, Yealink) ☁️ Cloud & Virtualization • MS 365, Azure, AWS • VMware vSphere / ESXi • Linux (RHEL, CentOS, Ubuntu) 🏆 Certifications • 3CX Advanced Certified • CCNA — Cisco Certified Network Associate • RHCSA & RHCE — Red Hat Certified • VMware Data Center Virtualization Notable projects include deploying VoIP platforms for banks, 2000+ user mail server deployments, and full data center virtualization implementations. I work with small carriers, CLECs, UCaaS providers, VoIP resellers, and businesses of all sizes. Whether you need a quick fix or a full system deployment — I deliver reliable, enterprise-grade solutions. Let’s talk about your VoIP challenges today.

I am a Dynamic, Dedicated, Passionate and Quickly Adaptable Freelancer with Technological innovations. I am a 🏅Upwork-Skill-Certified Freelancer with ✅100% JSS ✅ 70%+ Long-Term Clients ✅ 80%+ Clients Recommendation ✅ 90+ Active and Completed Jobs with Positive Feedback🏅Architect Certified on Sophos, Fortinet Firewalls and Endpoints Managements ✅ Others Certification on Network and Security✅ Strong and long Experiences on Fortinet, Sophos, SonicWall, Palo-Alto, PFSense Infrastructures Deployments, Migration and Managements✅ Any kinds of Wireless and Voice Solution Deployments✅ Network, System Security & Compliance Managements✅ Strong Experience on Routing & Switching🏦 Long-Experience with MSP, Corporate and Solution/Service-Provider Sectors. 🏦 Already worked with 90+ clients from different regions such as Asia, Africa, US, Europe etc. 🎖️Certifications (Completed & Enrolled) • Upwork Skill Certification - Customer Service. • Certified Architect by Sophos and Fortinet. 🏅 Sophos Certifications: • Sophos-Firewall v19.5-Engineer. • Sophos Firewall v19.5-Architect. • Sophos Firewall v19.5 to v20.0 Certified Architect Delta (AU80). • Sophos Firewall v19.5 to v20.0 Certified Engineer Delta (EU80). • Sophos Firewall v20.0 to v21.0 Certified Architect Delta (AU80). • Sophos Central Endpoint and Server v4.0-Engineer. • Central Endpoint and Server v4.0-Architect. • Sophos Central Endpoint v4.0 to v5.0 Architect Delta (AU15). • Sophos Central Engineer Delta v4.0 to v5.0 (EU15). 🏅 Fortinet Certifications: • NSE-7 (Network Security Architect) –NSE-ID:- 0Qjbf0qGSd • NSE-4 (Network Security Professional) – NSE-ID:- GThFxY1viO • NSE-5 (Network Security Analyst) on FortiAnalyzer- NSE-ID: - 8gIRCniwPN. • NSE-1 (Network Security Associate) By Fortinet License Number: OYBF7cetpL. • NSE-2 (Network Security Associate) By Fortinet License Number: FTsFjlmHck. 🏅 Other Certification: • CNSS (Certified Network Security Specialist) By ICSI, UK License Number: 18427811 • Cisco Certified Network Associate (Routing & Switching) Cisco-ID: - CSCO13303817 Here, I would like to share my Working experiences, fields of expertise and much more- ✅ I have 9 years plus hands-on experiences on Network, System, Security administration, Deployment and Migrations on different Infrastructures along with direct involvements/cooperation on different known issues from Deployment stage to end-user’s support. ✅ Fields of Specialization: 1. Because of having 9 years plus exclusive experiences on different Fortinet, Sophos, SonicWall, PFSense, Palo-Alto and other Infrastructures Deployments and Administration I can work with the Complete Design, Deployments, Migrations and Integrations on these Different types of Infrastructures such as- • Fortigate, Forti-APs, Forti-Switches, FortiVoice-Enterprise, Forti-Manager, Forti-EMS,FortiAnalyzer, FortiAuthenticator, FortiNAC, Fortinet Security Fabric Devices, FortiSandbox, FortiToken/Mobile/Service. • Sophos Infrastructures Managements such Firewalls, Endpoints, Switches, APs etc. • SonicWALL Infrastructures Managements such as Firewalls, NSM, Capture-Clients Endpoints etc. • Palo-Alto, Barracuda, PfSense, Cisco-Firepower, Firepower-Thread Defence and FMC and Others Firewalls Managements. • Migration To/From any of these above Infrastructures. 3. Long experiences on the Network and System Administration on these Infrastructures- • Routing & Switching on Cisco, Mikrotik, Juniper, HP, Dell, Aruba etc. • Wireless Implementation on Cisco, Aruba, Ruckus, 4Ipnet, Unifi/Ubiquiti, Forti-AP, Cambium, Altai, TP-Link-Omada, Teltonika etc. • Mail-Server Administration on Office365, G-Suite by Google, Zimbra etc. • Windows Server Managements. • Virtualization & Datacentre Managements on VMware, ESXi, vSphere or VCenter, Hyper-V, Synology-NAS/SAN and Others. • Voice Solution implementation on renowned Voice Solution Providers such as FortiVoice Enterprise, Grandstream, 3cX, Synway, Yeastar-PBX, FreePBX etc. • Endpoint Solution Deployments on TrendMicro, Sophos Endpoint Protection, FortiClient by Forti-EMS (Endpoint Management Server), ESET etc. • Complete Video Conferencing Solution on Dahua, Polycom etc. • Surveillance, Attendance reader solution on Hikvision, Dahua, ZKTecho, Handuri etc. 4. I am a quick and dynamic learner. I can adjust myself with the Technological innovation within a very short amount of time. 5. I am a technical person with a Never Give-Up character. I have multiples valuable feedback with great reviews on Upwork. You can also have a look at that. If you have any further query on me just send "Hi" in Upwork.

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.

Hello! I’m Sorna Kundu, Manager of Network & Systems Engineering, with over 13+ years of professional experience in the Internet Service Provider (ISP) and Telecom sectors. I specialize in designing, implementing, and operating secure, scalable, and high-availability network and server infrastructures for enterprise and service-provider environments. My expertise covers: Network Infrastructure – Advanced routing & switching using Cisco, Juniper, MikroTik, F5, Firewalls, and Cisco APIC (ACI) in complex production networks. Core Networking Technologies – Deep hands-on experience with TCP/IP, OSPF, BGP, MPLS, Traffic Engineering, L2VPN, L3VPN, routing policies, and QoS. VPN & Secure Connectivity – Site-to-Site VPN, Remote Access VPN, IPsec, and GRE over IPsec for secure and reliable inter-site communication. Server & Systems Engineering – Linux system administration (Ubuntu, CentOS, Debian), server deployment, DNS, DHCP, Web, Mail, and Database services, virtualization (VMware, Proxmox), storage, monitoring, backup, and high-availability solutions. Operations & Troubleshooting – End-to-end network and server troubleshooting, performance optimization, migration, and 24/7 production support. I have also worked on top OTT platforms in Bangladesh, including Toffee, T Sports, and Binge, where I supported high-traffic, low-latency streaming infrastructures serving millions of users. My role focused on ensuring service availability, scalability, and performance during peak viewership. Why Work With Me: ✅ End-to-end expertise in both network and server infrastructure ✅ Hands-on experience supporting OTT platforms at a million-user scale ✅ Expert troubleshooting and root-cause analysis ✅ Production-ready designs, not lab-only solutions ✅ Clear communication and professional delivery