EXPLORE


6.9
6.9
96%
$50 USD / Hour
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Bangladesh (2:27 PM)
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Joined on October 6, 2012
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17 Recommendations
$50 USD / Hour
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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%

AWS Certified Solutions Architect - Professional

AWS Certified SysOps Administrator - Associate

Digium Certification

Redhat certified specialist

Freepbx

asteriskbd service

AWS Certified Solutions Architect - Professional

AWS Certified SysOps Administrator - Associate

Digium Certification

Redhat certified specialist

Freepbx

asteriskbd service
All problems solved very professionally. Very good work. Thanks.
Gary C.
@gczychi
•

Euskirchen-Flamersheim, Germany
•
Share
great developer. I've received more then I asked. Highly recommended!
Aurimas G.
@aurimasgr
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Vilnius, Lithuania
•
Share
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
•
Share
One or the best engineers i ever worked with. Very polyvalent and solution oriented , Will definetely rehire.
Former Client (inactive)
Share
Abu, was very knowledgeable and worked expeditiously.
Bryan H.
@sharkbitz
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Cape Coral, United States
•
Share
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.

Louisiana, United States
May, 2024 - Present
•
1 year, 6 months
Technical Engineer Cloud Deployment and Ops
Dec, 2022 - Jan, 2024
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1 year, 1 month
Virtuozzo
Dec, 2022 - Jan, 2024
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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
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3 years, 3 months
Nautilus SIP Pte
Jul, 2019 - Oct, 2022
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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
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3 years, 3 months
Education
De Montfort University
2021 - 2022
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1 year
Msc in Cyber Security

United Kingdom
2021 - 2022
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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
VPN
Basic Numeracy
PHP
Unix
MySQL
US English
Network Programming