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Project for Sergey S.
“Sergey pays attention to detail. Easy to work with. I have hired Sergey for many projects and received the best service and communication beyond anyone else here.”Eugene D. 3 giorni fa
Project for Sergey S. -- 2
“Excellent professional, very easy to work with.”Nestor B. 3 giorni fa
Project for Sergey S.
“Excellent work, great communication, very knowledgeable. I’ll definitely be using him again.”Nestor B. la settimana scorsa
FreePBX Plugin that collects data from a user after IVR
“Sergey was fantastic, he was able to develop a FreePBX module fast, and it works perfectly. His English was almost fluent, as well as being very friendly. He communicated well with me about the project and gave me regular status updates, which is not something I am used to when it comes to freelancers. After working with him once I plan on having him do many more projects for me in the future. I would hire him full time if I could!”Marcello B. 3 mesi fa
“sergei is very professional and dedicated programmer, he did the project on the best side and delivered the product working as asked. thanks a lot sergei .”Eliraz A. 7 mesi fa
“Проект выполнен в срок и в рамках бюджета”Edgar R. 11 mesi fa
Senior VoIP engineerNov 2014
[login to view URL] Asterisk, Freeswitch, Kamailio maintainig. SIP traffic debug and troubleshooting.. Support team job. Soft switch tests. Analysis of such parameters as ASR, ACD. Work with MVTS-II soft switch. Using system NetSense and scripts iperf, SIPp. Monitoring with Nagios and Zabbix.
VoIP engineerJan 2011 - Nov 2014 (3 years)
Work with VoIP and PSTN, experience with the signaling protocols: SIP, SDP, RTP, IAX2, H323, SS7, TLS, SRTP. Interfaces DAHDI, AMI, AGI, PRI. Setting up and supporting Call centre, about 30 operators. Setting up VoIP using Asterisk, dialplan creating, developing Asterisk code, PHP, bash. Assisting developers with any service-related issues or feature requests. Jointly managing a network of 300 phones. Reporting based on CDR, CEL databases data.
Head of IT DepartmentJul 2009 - Dec 2010 (1 year)
Administration of local corporate network in the city of Irkutsk. Work with equipment Cisco, D-link. Administration of the DNS, mail servers and billing running by Windows 2003 server, FreeBSD, RedHat. Knowledge of the basic routing protocols, TCP/IP protocol stack, as well as the principles of switching technology VLAN, VTP, STP.
CTONov 2004 - Dec 2010 (6 years)
Participation in the project of constructing the optical transport network in the city of Irkutsk, maintenance of the existing operator's network. Administration of switches and routers of the company Cisco. Administration of the DNS, mail servers and billing running by Windows 2003 server, FreeBSD, RedHat. Knowledge of the basic routing protocols, TCP/IP protocol stack, as well as the principles of switching technology VLAN, VTP, STP.
Bachelor's degree1991 - 1996 (5 years)
Certificate "Design networks" from company "D-Link Russia" (2012)D-Link
Certificate "Design VoIP networks" from company "D-Link Russia" (2011)D-Link
Certificate "Asterisk. Level 2. The phone systems and securety" (2017)Specialist
36 hours of lections and labs
Unix Level 195%
US English Level 192%
Preferred Freelancer Program SLA84%
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