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$40 USD / hour
Flag of BANGLADESH
$40 USD / hour
It's currently 1:01 PM here
Joined October 6, 2012
17 Recommendations

Mohammad Abu S.

@abusayed2004

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4.9 (95 reviews)
6.7
6.7
87%
87%
$40 USD / hour
Flag of BANGLADESH
$40 USD / hour
96%
Jobs Completed
98%
On Budget
93%
On Time
17%
Repeat Hire Rate

Asterisk PBX, SIP, Linux, Cloud, DevOps, Security

I am currently seeking long-term remote and onsite job opportunities. With 13 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 customization. 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: - Linux - Hosting Systems Administration & Monitoring - Design and implementation of High-Performance SIP SBC - DevOps CI/CD - Service Optimization - 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.

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Portfolio

Reviews

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Showing 1 - 5 out of 50+ reviews
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5.0
€400.00 EUR
Task performed professionally and in perfect timing, always available and supporting in fixing any unexpected problem. I strongly suggest to engage him because he is able to provide assurance about results both technically and in timing
Linux
Software Architecture
Asterisk PBX
VoIP
MySQL
+1 more
H
Flag of Marco P.
@Hadrons
14 days ago
5.0
$100.00 USD
Very Proffesional ... I will hire him again !! Recomand
Linux
Software Architecture
Asterisk PBX
VoIP
MySQL
+1 more
User Avatar
Flag of Septimiu M.
@septimiumocanu
16 days ago
5.0
€550.00 EUR
Mohammad performed an amazing job, in perfect due time, with high professionality and very high competence. i do really suggest to hire him for professional tasks
System Admin
Linux
Testing / QA
Asterisk PBX
VoIP
H
Flag of Marco P.
@Hadrons
18 days ago
5.0
$220.00 USD
Very knowledgeable, prompt and professional. Expert knowledge of GOIP/FreePBX.
Asterisk PBX
VoIP
User Avatar
Flag of David L.
@davidlambrix
26 days ago
5.0
$120.00 USD
Cooperative and professional
Linux
Asterisk PBX
VoIP
I
Flag of Ict I.
@ictinnovationsvw
2 months ago

Experience

Technical Engineer Cloud Deployment and Ops

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

Senior Engineer Telecommunications

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.

Linux administrator

http://www.meshtechnologies.net
Dec 2012 - Jun 2017 (4 years, 6 months)
Dealing with VoIP, Web development, vtiger integration, Call Center, And asterisk PBX, VoIP billing solution, a2billing install, customization, Server Rent and Commercial VoIP software like voipswitch, VOS3000, Mor-12, MVTS, install, configure and, support.

Education

Msc in Cyber Security

De Montfort University, United Kingdom 2021 - 2022
(1 year)

BBA

Dhaka International University, Bangladesh 2007 - 2011
(4 years)

Qualifications

IELTS

British Council
2023
IELTS General Training

AWS Certified SysOps Administrator – Associate

Amazon Web Services Training and Certification
2020
https://www.youracclaim.com/badges/c9bddd3c-2214-4468-b5d5-f1d8ba1e668b

AWS Certified Solutions Architect – Profesional

Amazon Web Services Training and Certification
2020
https://www.youracclaim.com/badges/802e18ec-0750-4588-8965-23cf41f5947f?source=linked_in_profile

Publications

VoIP Business

Dhaka International University
Graduate paper

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