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.
FreePBX
Zimbra Administration
Virtual Private Server
VICIDIAL
Linux System Administration
VoIP Administration
Elastix
Asterisk
Exim
IPv6
Dovecot
DevOps
Kubernetes
Md Norul A.
Dhaka North City Corporation, Bangladesh
$40/hr
5.0
164 jobs
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.
VPN
Network Security
Firewall
Fortinet
Network Administration
FortiGate Firewall
Security Infrastructure
Palo Alto Firewalls
Wireless LAN Controller
Security Management
Sophos Sophos UTM
VoIP PBX
System Administration
PfSense
SonicWall
Gobinda P.
Dhaka, Bangladesh
$50/hr
5.0
82 jobs
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.
FreePBX
Amazon Web Services
Google APIs
VICIDIAL
Red Hat Enterprise Linux
Session Initiation Protocol
Asterisk
VoIP Administration
IBM Watson
Telecommunications Engineering
Linux System Administration
MySQL
Natural Language Processing
VoIP Software
Tanvir I.
Dhaka, Bangladesh
$30/hr
4.9
6 jobs
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.
FreePBX
Elastix
PHP
Asterisk
MySQL
CRM Development
VoIP PBX
Web Application
Vtiger
VoIP
WebRTC
Md.Shamim Ahmed R.
Dhaka, Bangladesh
$65/hr
4.1
85 jobs
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.
FreePBX
CentOS
Microsoft Azure
Linux System Administration
VICIDIAL
Zimbra Administration
VMware Administration
Asterisk
Network Engineering
Virtualization
VoIP Administration
3CX
VoIP PBX
Elastix
VoIP Software
MD Tarikul I.
Dhaka, Bangladesh
$50/hr
5.0
56 jobs
Hi! I’m here to help you resolve your networking challenges with extensive experience across multiple platforms, including Mikrotik, Cisco, Juniper, and Ubiquiti devices. With over 12 years of professional experience, I’ve managed complex networking environments, optimized infrastructure, and implemented both small- and large-scale network solutions.
My Core Skills Include:
Routing and Switching:
I have deep expertise in the design, configuration, and troubleshooting of a wide range of routing and switching protocols. Whether you’re looking to improve traffic routing or ensure network redundancy, I can implement:
• BGP (Border Gateway Protocol)
• OSPF (Open Shortest Path First)
• RIP (Routing Information Protocol)
• PBR (Policy-Based Routing)
• Static Routing and VLAN
• Failover Solutions
Wireless Solutions:
I have vast experience in designing and deploying wireless solutions that provide robust, scalable coverage for different environments:
• WiFi Hotspot Implementation
• WiFi Roaming
• Standalone AP and CAPsMAN
Monitoring & Network Management:
Real-time monitoring, logging, and alerting can prevent downtime and keep your network performing at its best. I work with:
• The Dude
• SNMP, Netflow
• PRTG and SolarWinds
• SevOne PM
• NetBox
VoIP and Server Management:
I specialize in deploying and maintaining communication systems (VoIP) and backend infrastructure:
• Asterisk and FreeSwitch
• Server Management
• Dolibarr and OpenERP
Virtualization and Cloud:
Need to set up virtual machines or integrate cloud services? I have hands-on experience in:
• VirtualBox
• VMware-ESXI
• ProxMox
Network Security: I offer full security solutions from basic firewall setups to comprehensive multi-layered security frameworks:
• VPNs (IPsec, PPTP, L2TP, OpenVPN, WireGuard)
• ACLs (Access Control Lists)
• Firewalls (Mikrotik, Cisco ASA, Juniper SRX)
• Security Audits
Devices and Platforms I Work With:
• Mikrotik Routers: Devices such as CCRxxx, RBxxxx, AHxxx, cAP ac, and others.
• Mikrotik Switches: Various CRS series, including CRS328-24P-4S+RM, for both core and edge deployments.
• Cisco Routers: Including ISR 800, 4500, 1700, 2800, 2900, 3900 series, and ASR 1001-X.
• Cisco Firewalls: ASA 5500, 5500-X, and Firepower 2100 for network security.
• Cisco Switches: Extensive work with C2950, C2960-X, C3560, C3850, C4500, C6500, and more.
• Juniper Routers and Switches: Including MX480, MX960, MX104 routers, and EX2200, EX4200, EX4300 switches.
• Ubiquiti: EdgeRouter, UniFi series for efficient, scalable network deployment.
• Dell and IBM Servers: Deployment, management, and configuration.
Network Design and Optimization:
I am proficient in assessing existing network setups and recommending improvements to streamline performance, increase security, and reduce latency. Whether you’re setting up a new data center or scaling up your current infrastructure, I can guide you through choosing the right devices and configurations for optimal results. Additionally, I provide consultation on network best practices, compliance with industry standards, and cost-effective hardware recommendations.
NMS, NPM and DCIM Solutions:
I can also deploy fully customized solutions for Network Monitoring System(NMS), Network Performance Monitoring (NPM) and Data Center Infrastructure Management (DCIM). I’ve worked extensively with The Dude, SevOne, NetBox and offer solutions that can be integrated into your existing infrastructure under the management platforms.
Project Experience:
With over 12 years in the field, I’ve successfully deployed over 1,000 Mikrotik devices and managed a variety of network projects involving multi-vendor environments. From small office networks to large-scale Network setups, I’ve managed both deployment and long-term support. I am skilled in troubleshooting, optimizing existing systems, and ensuring the reliability and scalability of networks.
How I Can Help You:
Whether you need help with routing and switching, setting up firewalls, designing a wireless network, deploying VoIP, or managing servers and virtual environments, I’ve got you covered. I can help you plan and deploy the best network solutions tailored to your unique needs. Plus, I’ll ensure ongoing support, so your network always performs at its best.
I look forward to working with you and making sure your network infrastructure is both powerful and reliable! Let’s connect and discuss how I can help you achieve your goals.
MikroTik
MikroTik RouterOS
Mikrotik RouterBOARD
Scripting
VPN
Network Planning
Network Design
Network Equipment
Network Monitoring
Virtual LAN
Cisco Router
Juniper
Linux
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