Zhong W.
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Zhong W.

Perl hacker and Voip Expert


上海, China


I have more than 8 years working experience of voip industry. i am proficient in Asterisk, Freeswitch, Kamailio,Fusionpbx, A2Billing, Freepbx,Freeside and Linux Administrator. And i have planned and built dozen multi-tenant carrier pbx. i have been always supporting two muti-tenant carrier pbx systems based thirdlane and FusionPBX which both have more than 500 concurrent calls and 3000 registrations extensions. I am able to coding with C/C++, Perl, PHP, shell, sql and other programming language. And I have done sucessfully about 30 jobs about voip system on upwork . I am steady, honest and hard-working. I am fond ... moreof innovation and pursuiting new techonologies. less

Work History and Feedback

  • Jun 2014

    Custom A2billing Future
    Fast, great speed and and awesome knowledge in a2billing i would defiantly hire again.
    $166.67 earned
    Fixed Price

  • Jan 2013 - Jun 2014

    Asterisk CDR creation using CEL

    No feedback given

    44 hours
    $22.22 / hr
    $966.72 earned

  • Apr 2014

    technician console
    13 hours
    $23.33 / hr
    $264.50 earned

  • Sep 2013 - Feb 2014

    A2Billing Multi-Tenant PBX Systems

    No feedback given

    197 hours
    $23.33 / hr
    $4,644.90 earned

  • Aug 2013 - Feb 2014

    Elastix / Asterisk Configuration

    No feedback given

    4 hours
    $20.00 / hr
    $73.33 earned

  • Sep 2013

    zhong is very honest and dependable..delivered needed on time in clean and perfect solution
    $133.33 earned
    Fixed Price

  • View More (7)

Zhong W. has more jobs to show. Create an account to review them.


Name Score (out of 5) Time to Complete
Perl 5 Test 3.40 Above Average 15 mins
Programming with C Test 3.75 Top 20% 18 mins
Redhat Linux 9.0 General Test 3.50 Below Average 16 mins
U.S. English Basic Skills Test 2.75 Below Average 34 mins

Work History

100% Job Success
2,758 hours worked
36 jobs


Less than 30 hrs/week


Phone Number: Verified

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