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Asterisk PBX Linux MySQL Software Architecture VoIP
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Mohammad Abu S.

@abusayed2004

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4.9
102

6.9

6.9

96%

Ai Voice Agent, Asterisk PBX, SIP, Linux, Security

$50 USD / Hour

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Bangladesh (2:27 PM)

Joined on October 6, 2012

17 Recommendations

$50 USD / Hour

I am currently seeking long-term remote and on-site job opportunities. With 15 years of experience, I have worked extensively with VoIP, Asterisk, cloud technologies such as AWS and OpenStack, Server security, Vtiger CRM, Open VPN, CentOS, Ubuntu, Redhat, VoIPSwitch, Oracle DB, RHEVM, MySQL, and Linux customisation. I am also proficient in Python and PHP scriptwriting for IVR and AGI implementation on Asterisk. I have a team for support and further development. My expertise includes: - Ai Voice Agent build and operations multi tenant platform. - Linux - Hosting Systems Administration & Monitoring - Kubernaties, IoT tech stack - Design and implementation of High-Performance SIP SBC - DevOps CI/CD - Service Optimisation - Security Hardening - VoIP, Asterisk, SMS, Dongle, and FreePBX installation, configuration, and maintenance - WebRTC SIP Phone - Infrastructure Planning - Disaster Recovery - Shell Scripting - Capacity planning, application delivery planning - Network Troubleshoot, Spanning Tree, PVST, RSTP, HSRP, RIP, BGP, EGRP, IGRP, MPLS - SAN Troubleshoot - GlusterFS, CEPH - NFS, SMB, ISCSI, SMTP - Linux performance tuning - MySQL, Oracle DB performance tuning - Laravel web application development - Web Security, Web benchmark, best practice - IPTV, Live streaming, VOD, FFmpeg - Raspberry Pi Please let me know if you have any questions or require further information.

Verifications

On time

94%

On budget

98%

Accept rate

87%

Repeat hire rate

17%

Portfolio

Portfolio

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4.9 · 102 Reviews
Reviews
G

Looking for pfSense & FreePBX Professional with German Telephone System Experience €297 EUR

All problems solved very professionally. Very good work. Thanks.

Gary C.

@gczychi

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Euskirchen-Flamersheim, Germany

6 months ago

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A

Asterisk PBX Configuration for Customer Support €150 EUR

great developer. I've received more then I asked. Highly recommended!

Aurimas G.

@aurimasgr

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Vilnius, Lithuania

11 months ago

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S

Remote Work VPN Setup for Travelling Router $200 USD

there is no doubt that Mohammad Abu S. is an expert on the set up for my project. Essentially to create a VPN between a traveling router and my home network. This was successfully done using 2 Mikrotik routers and a Raspberry pi computer

Serge B.

@sbriet

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Toronto, Canada

1 year ago

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A

Project for Mohammad Abu S. $647.40 USD

One or the best engineers i ever worked with. Very polyvalent and solution oriented , Will definetely rehire.

Former Client (inactive)

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S

Asterisk RTP/audio Communication Fix $40 USD

Abu, was very knowledgeable and worked expeditiously.

Bryan H.

@sharkbitz

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Cape Coral, United States

2 years ago

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Experience

Chief Information Officer

May, 2024 - Present

1 year, 6 months

Zella Technology

May, 2024 - Present

1 year, 6 months

Developed and implemented IT strategy aligned with business goals, evaluating emerging technologies like VoIP to enhance services. Led technology roadmaps for growth and scalability. Managed IT systems ensuring high availability and security. Enhanced VoIP services and integrated with IT infrastructure. Oversaw network equipment deployment and optimized data centres. Led IT support teams, implemented best practices, and advanced monitoring systems for proactive management.

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Louisiana, United States

May, 2024 - Present

1 year, 6 months

Technical Engineer Cloud Deployment and Ops

Dec, 2022 - Jan, 2024

1 year, 1 month

Virtuozzo

Dec, 2022 - Jan, 2024

1 year, 1 month

● Technical Engineer at Virtuozzo, specializing in Cloud Deployment and Ops. ● Design and deploy Public and Hybrid cloud solutions for MSP, ISP, and Cloud Service Providers. ● Expertise in Infrastructure-as-a-Service and Application-as-a-service products. ● Proficient in Software-defined storage and software-defined Network Solutions. ● Managed Cloud Security and System Security. ● Plan to Deploy large-scale Hyper Converged infra for MSP, ISP

Dec, 2022 - Jan, 2024

1 year, 1 month

Senior Engineer Telecommunications

Jul, 2019 - Oct, 2022

3 years, 3 months

Nautilus SIP Pte

Jul, 2019 - Oct, 2022

3 years, 3 months

I am working as an Engineer in Telecommunications, in Cloud telephony service provider with Linux, SIP, Asterisk, Networking, and AWS. Keys achievement: Reduce customer complaints by 60%, with improved infra design. Removed bottleneck, Removed Single point of failure. Implemented Monitoring system, Automated server and service provisioning. Integration with Zendesk as voice channel provider, Design and Deployed WebRTC phone, Rearchitected AWS infra for cost optimisations.

Jul, 2019 - Oct, 2022

3 years, 3 months

Education

De Montfort University

2021 - 2022

1 year

Msc in Cyber Security

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United Kingdom

2021 - 2022

1 year

Qualifications

IELTS

2023

British Council

IELTS General Training

2023

AWS Certified SysOps Administrator – Associate

2020

Amazon Web Services Training and Certification

https://www.youracclaim.com/badges/c9bddd3c-2214-4468-b5d5-f1d8ba1e668b

2020

AWS Certified Solutions Architect – Profesional

2020

Amazon Web Services Training and Certification

https://www.youracclaim.com/badges/802e18ec-0750-4588-8965-23cf41f5947f?source=linked_in_profile

2020

Publications

VoIP Business

Dhaka International University

Graduate paper

Certifications

P

Preferred Freelancer Program SLA

Freelancer Orientation

Freelancer Orientation

VPN - Level 1

VPN

Basic Numeracy - Level 1

Basic Numeracy

PHP - Level 1

PHP

Unix - Level 1

Unix

MySQL - Level 1

MySQL

US English - Level 1

US English

Network Programming - Level 1

Network Programming

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