SIP Freelancers

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SIP Job Cost Overview

Typical total cost of Upwork SIP projects based on completed and fixed-price jobs.

Upwork SIP Jobs Completed Quarterly

On average, 34 SIP projects are completed every quarter on Upwork.

34

Time to Complete Upwork SIP Jobs

Time needed to complete a SIP project on Upwork.

Average SIP Freelancer Feedback Score

SIP Upwork freelancers typically receive a client rating of 4.50.

4.50
Last updated: May 1, 2015

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  1. Sergii Lysiuk

    Sergii Lysiuk

    Network Security VoIP Specialist - Cisco, Juniper, Linux, Asterisk

    Ukraine - Last active: 11 days ago - Tests: 17

    I am looking for projects that I can complete on a part-time basis. They can be either short term projects or long term projects. I can also provide ongoing consulting and administration if needed. I am experienced in Cisco Routing & Switching, MPLS, Security, Network infrastructure applications ( SNMP, Radius, DNS, DHCP , etc) Voip - including Asterisk, Call-Manager , Unity, FreePBX, Elastix. Server administration experience ( Linux, FreeBSD)

    $38.89 /hr
    381 hours
    5.00
  2. Arsen S.

    Arsen S.

    VoIP Administration & Development

    Bulgaria - Last active: 15 hours ago - Tests: 2 - Portfolio: 6

    I am focused in VoIP field only and I have been working here for more than 8 years. My Area of experiences: VoIP -Asterisk PBX: Full proficiency -FreeSWITCH: Full proficiency -Yate: Full proficiency -Strong knowlege of SIP protocol and SIP routers/proxy servers -OpenSER (Kamailio/OpenSips) -Load Balancing, Least Cost Routing, High Availability, NAT Traversal, Rate and billing systems, etc. -IVR and Auto Attendant Development -Secure VoIP: TLS, SRTP, ZRTP Full proficiency in free Billing/CDR solutions: -A2Billing: Full proficiency (configuration from scratch, customisation) -CDRTool (prepaid billing/accounting and sip tracing for OpenSIPS using RADIUS) -CDR-Stats (call detailed statistic/realtime stat for asterisk and freeswitch) -cgRates (billing for Freeswitch) I provide: - Development of custom Billing and software solutions for Premium Rate Numbers business. - HA and Scalability solutions for existing VoIP networks. - Development and optimisation of VoIP networks/projects. - Ongoing support via request/ticket tracker system. - VoIP Security and Hacker protection solutions. I have successfully completed large amount of commercial installations of VoIP PBX servers. From SOHO to Enterprise deployment including integration of various VoIP solutions into existing network environment. I also have experience in building of secure "bastion" VoIP/Linux servers. Payment Terms: Minimal support package 5 hours. Short-term hourly support: $50 For long-term support please contact for price options. For sizable development projects please contact for price options. We charge upfront scoping (roadmapping meeting, flat-rate). Hourly based projects: -Current hourly rate is $50. Price per projects/feature: -Fixed price projects are calculated based on the hourly rate and expected task complexity. -For all fixed price projects complete project specification with clear tasks description is required -For all fix price projects work will be started only after payment has been es-crowed and both parties have agreed with working terms.

    $55.56 /hr
    126 hours
    5.00
  3. Hector Bravo

    Hector Bravo

    IT Expert - Project Manager - PMP, ITIL, VCP, MCSE, MCDBA, VoIP

    Panama - Last active: 1 month ago - Tests: 13

    Design, Plan, Implement and Support for: - Windows Azure / Amazon EC2 - Microsoft Lync - Microsoft Sharepoint - Microsoft Exchange - Microsoft SQL Server - Microsoft Active Directory, ADFS - Microsoft Dynamics CRM - Windows Server / Hyper-V - Microsoft ISA/TMG/UAG - Microsoft SSCM, SCVMM, DPM - Microsoft Office 365 - Voice Integration with Lync - VMWare vSphere / ESXi - VMWare Site Recovery Manager (SRM) - Veeam Backup & Replication

    Groups: Microsoft Certified Professionals

    $33.33 /hr
    930 hours
    4.56
  4. Alex D.

    Alex D.

    Network / Security / VoIP / Unix Specialist

    Russia - Last active: 2 days ago - Tests: 6 - Portfolio: 3

    15+ year experience in networking. Built an ISP (Internet Service Provider) from scratch. Network Planning, Designing, Implementing and Optimizing. Right now we have about 4500 customers. We use Wireless & Fiber technologies. I do WISP and ISP consulting. I specialize on the following products: *** HP (mainly ProCurve switches family and rack servers) *** D-Link (layer 2 & 3 manageable switches) *** Ubiquiti (AirMax, Unifi, mFi & AirFiber products) *** Mikrotik (CCR series, wired & wireless RouterBoard series, x86 RouterOS) *** Grandstream (VoIP PBX, Phones, Gateways and ATAs) *** Linksys (VoIP products) *** Cisco (VoIP products and Catalyst series) *** DELL (SonicWall series) *** Draytek (Network & VoIP series) *** Other products: Linux, Mac OS X, Windows, vmware ESXi, Asterisk, FreePBX I have a good knowledge of the following technologies: TCP/IP, IPv4, Static & Dynamic routing, BGP, EIGRP, OSPF, Layer 2 & Layer 3 VPNs, IPSec, NAT, PAT, STP, VLAN, QinQ, GVRP, HSRP, VRRP, RSTP, MSTP, VTP, RDP, Firewall, Remote Access, HTTP, Load balancing, QoS, CoS, OpenVPN. Check out tests I've passed. I'm new to oDesk, thats why my hourly rate is low now :-) I'm ready for a test task.

    $34.99 /hr
    50 hours
    5.00
  5. Alexander K.

    Alexander K.

    Cisco Network Engineer | CCNP Security, Voice, RS

    Estonia - Last active: 1 day ago - Tests: 5 - Portfolio: 5

    I have been working with a broad range of network topologies, from small office to huge distributed network. Being in the industry more than 8 years, I have a lot of expirience in major enterprise technologies: Security, Voice, Data and Wireless. I am proficient in configuring Cisco routers, switches, ASA firewalls, SourceFire 3D, wireless controllers, CUCM, Unity, Presence, UCCX and other voice platforms, planning and deploying high available topologies, miscellaneous types of VPNs. I have also been involved in projects contained security configuration audit and best practices compliance checks. Certifications: ========== CCNP, CCNP Security, CCNP Voice, ASA (VPN/Firewall) Specialist Hardware: ========== Switches: 2960 / 3650 / 3750x / 3850 Routers: 88x / 19xx / 28xx / 29xx / 38xx / 39xx / ASR Firewalls: ASA 5505 to 5585 Wireless: WLC 2504, 5508, NGWC 5760, virtual WLC Technologies: ========== +Voice: * Cisco Unified Call Manager / CUCM * Cisco Unified Call Manager Express / CUCME, SRST * Cisco Unified Contact Center Express / UCCX, UCCX scripting * Cisco Unity Connection / CUC * Cisco Unity Connection Express, IVR Scripting * Cisco Presense * H.323, SIP, MGCP, T1/E1 Controllers * QoS, Call Admission Control +Security: * network configuration audit * misc ACL implementation * statefull firewalls: CBAC, Zone-Based Firewalls * Identity-Based firewalls * SourceFire 3D * router / switch hardening * best practices compliance * administrative accounting to syslog +ASA firewalls: * single-context and multi-context mode * failover (active-standby and active-active mode) * clustering * security policies and protocol inspections * WCCP proxy redirection * WAN link failover * dynamic routing * NAT +VPN: * Remote Access - Radius, LDAP and Certificate-based authentication - Active Directory authentication - OCSP revocation check - SCEP enrollment - one-time passwords * Lan-to-Lan * DMVPN * SSL VPN * GET VPN * IKEv1 and IKEv2 +Wireless: * Cisco Wireless controllers 2504, 5508, NGWC 5760, virtual VLC * Miscellaneous Cisco Aironet Access points * FlexConnect * Local switching / centralized switching * High availability / failover * Mobility / roaming * BYOD auto-provision with Cisco ISE * VoIP over WLAN (Cisco 792x phones) +Switching: STP, VTP, trunking, multilayer, port security, 802.1x, dynamic policy-based VLAN assignment +Routing: EIGRP, OSPF, BGP, redistribution, HSRP, GLBP, PBR, SLA, WAN redundancy +Centralized authentication: Cisco Secure ACS, Cisco Identity Services Engine / ISE, Microsoft Windows IAS/NPS, Microsoft CA server, Microsoft OCSP Online responder, SCEP certificate enrollment, OpenOTP +Network monitoring: netflow, syslog-ng, zabbix, cacti, prtg +Virtualization: Hyper-V, VMware ESXi/Infrastructure

    $55.00 /hr
    123 hours
    4.88
  6. Kirill P.

    Kirill P.

    Asterisk Expert and System Administrator

    Russia - Last active: 7 days ago - Tests: 10

    I work on IT more than 12 years. VOIP/Asterisk Developer, Expert System Administrator and Network Administrator, Perl Programmer. Generally, I develop solutions based on Asterisk and speech technologies (speech synthesis and speech recognition systems), complex IVRs, integration with external sources and databases, custom click-to-call and callback systems, etc. I prefer custom development for Asterisk and FreeSWITCH. Usually, I use Perl for development. I have huge experience in solutions based on Asterisk such as FreePBX, Elastix, Trixbox, vicidial, etc. Also I support critical 24x7 systems, administration networks and servers, perform IT consulting, etc.

    $25.00 /hr
    10 hours
    5.00
  7. Suren Karapetyan

    Suren Karapetyan

    Senior System/Network Administrator (devops)

    Armenia - Last active: 15 hours ago - Tests: 8

    An ambitious *nix System and Network Administrator with eight years' experience working in ISPs and other service providers maintaining existing and designing new infrastructure. DevOps skills which help to bridge sysadmins' and developers' teams. Master's degree in Math Sciences. I'm looking for interesting projects which use new/young technologies and provide new challenges. Would also be great to work with interesting people.

    $35.56 /hr
    825 hours
    4.91
  8. Petr Kudinov

    Petr Kudinov

    Russia - Last active: 1 day ago - Tests: 4 - Portfolio: 1

    I'm professionaly programmer from 1997 (started on Pascal/C/FoxPro). Other the years i've developed billing systems for mobile operator and ISP, websites and very specific VOIP services. I have configured and supported many of the FreeBSD/Linux servers using Puppet/SaltStack. At this time i'm developing WEB applications using Angular JS or other JS engines on frontend and PHP on backend. I'm have good skills in software design, Javascript/PHP/PERL/C and SQL languages, as well as TCP/IP, HTTP, SIP, H.323, RTP. VCS - GIT/SVN

    $45.00 /hr
    1,631 hours
    5.00
  9. Raoul W

    Raoul W

    I am a mobile app developer

    Sweden - Last active: 15 hours ago - Tests: 2 - Portfolio: 10

    Hello, Sir. I am a passionate mobile app developer with 5+ years rich experience. I am developing mobile apps since the first iPhone GPS tracker in April, 2010. I have several iOS and Android devices and developed apps compatible with all devices. Over all these years, I have accomplished amazing mobile projects successfully. Here is my skills and experiences in mobile development. - location tracking by GPS on iPhone/Android - Integrate Map using Apple MapKit and Google Map API - find location by geolocation - chat & message engine by XMPP Protocol - voice / video call using SIP Protocol - video streaming by HLS Protocol - photo / video processing - e-Commerce solution integrated with payment gateway - local and push notification As a skilled mobile developer, I will provide professional advice and perfect development solution. There is no problem to build mobile app with any idea or sketch. Thanks.

    $49.99 /hr
    2 hours
    5.00
  10. Gohar A.

    Gohar A.

    VoIP Consultant [Asterisk, freeSWITCH, Kamailio, OpenSIPs, Vyatta]

    Canada - Last active: 2 months ago - Tests: 3 - Portfolio: 15

    Since last 7 years now I'm involved intensely in end-to-end VoIP setups. That included pre-deployment 360 degree Architecture planning. Actual development of the projects, including aiding other teams develop the exact required component for the projects. And after deployment Support. My career objectives are to be a very flexible expert capable of working on almost any layer. Come up with intelligent solutions to help achieve business goals smartly. I'm proficient in following domains * VoIP * Server Administration * Network Administration I've experience in Following tools. * Asterisk * FreeSwitch * OpenSIPs * Kamailio * SEMS * Vyatta * MySQL * Linux OSs I've worked in following languages. * C++ * Perl * Php * Shell scripting Find More about Me from my VoIP Blog: http://saevolgo.blogspot.com

    $60.00 /hr
    152 hours
    4.99