Sergey A.
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Sergey A.

VoIP CallXML developer


Kazan, Russia


I am focused on efficiency of software development. I am improving my efficiency every day with great success. I am independent freelance developer with 10+ years experience, I can be responsible for your project. High quality of code is guaranteed. My favourite technologies are StarTrinity CallXML (VoIP scripts), WPF, AJAX, WPF, MVVM, Entities Framework. Over last 13 years I have successfully developed a wide range of applications for various businesses using C#, WPF, audio/video media processing and streaming, voice/text chats, Text-to-speech, C++, SIP, RTP, TCP/IP, HTTP. Now I am willing to help you with your project fulfilling if you know ... morewhat you want and if you have good understanding of what you need. With current employers I work trying to save their money and time by telling them about possible problems before the problems happen. less

Sergey A. has added 9 portfolio pieces. Create an account to review them.

Work History and Feedback

  • Aug 2013 - Dec 2013

    ASP desktop application

    No feedback given

    117 hours
    $28.89 / hr
    $3,384.97 earned

  • Dec 2011 - Aug 2012

    Develop a software that ingest streaming web video

    No feedback given

    312 hours
    $29.00 / hr
    $9,033.50 earned

  • Feb 2012 - Mar 2012

    Silverlight .NET 4 Expert
    very skilled worker, will use again
    42 hours
    $25.00 / hr
    $1,054.25 earned

  • Mar 2011 - May 2011

    Application Developer For Reverse Proxy
    Sergey is responsible for a complex programming project involving reverse TCP/IP connections and MySQL. He is doing a very good job.
    $500.00 earned
    Fixed Price

  • Nov 2010 - Dec 2010

    Demo ActiveX or Silverlight control showing microphone signal
    Great project, Sergey was very responsive and clearly communicated the questions he had along the way, as well as providing interim versions for me to provide feedback. Recommended.
    $166.67 earned
    Fixed Price

  • Oct 2010 - Dec 2010

    Create & show pin based voip dialing.

    No feedback given

    $3.33 earned
    Fixed Price

  • View More (1)

Sergey A. has more jobs to show. Create an account to review them.


Name Score (out of 5) Time to Complete
Russian To English Translation Skills Test 4.25 Top 20% 19 mins
Programming with C Test 4.10 Top 10% 29 mins
Programming with C# Test 3.10 Top 30% 40 mins
SQL Test 3.00 Top 20% 37 mins
ASP.Net 3.5 using C# Test 2.60 Top 30% 37 mins
Call Center Skills Test 4.25 Top 20% 31 mins
English To Russian Translation Skills Test 4.60 Below Average 26 mins
Customer Service Test 3.25 Below Average 34 mins
U.S. English Basic Skills Test 3.90 Top 30% 31 mins

Work History

100% Job Success
5,942 hours worked
32 jobs


More than 30 hrs/week

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