Find the Best SIP Jobs

Professionals on Upwork rate clients
Rating is 4.9 out of 5.
4.9/5
On average from 2M+ reviews

Check out a sample of the 105 SIP jobs posted on Upwork

$2,000
Fixed-price
Expert
Experience level

need an outbound sip which has external sip transfer enabled, and 20 channels plus. willing to pay the premium price if sompne can prov…

SIPVoIP AdministrationFreePBXCold CallingVoIP
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Hours to be determined
Hours needed
1 to 3 months
Duration
Expert
Experience level

We are building a private enterprise communications platform that combines telephony, browser-based softphone functionality, multi-tena…

SIPAmazon Web ServicesAPIVoIPVoIP AdministrationAPI DevelopmentAPI Integration
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AI-Powered Voice Agent Platform

Fixed-price ‐ Posted 9 days ago
$5
Fixed-price
Intermediate
Experience level

We are seeking an experienced AI Engineer to design and develop a real-time voice agent platform that can automate customer support int…

SIPVoice ActingVoice-OverEnglish
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30+ hrs/week
Hours needed
More than 6 months
Duration
Entry
Experience level

Senior Systems Administrator & Google Workspace Migration Specialist (US Hours) Overview We are seeking an experienced Systems Admini…

SIPMicrosoft Active Directory
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$400
Fixed-price
Expert
Experience level

​We are looking for an expert Network & Infrastructure Engineer to establish a secure, stable, and seamless Site-to-Site VPN connection…

SIPAsteriskVoIP
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$350
Fixed-price
Intermediate
Experience level

Do you have experience building a profitable communications platform on top of FreeSWITCH using providers such as Twilio, Telnyx, Signa…

SIPSMS GatewayTelecommunications EngineeringVoIPFreeSWITCH
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AI Voice Agent System for Customer Support

Fixed-price ‐ Posted 9 days ago
$5
Fixed-price
Intermediate
Experience level

We are hiring an experienced AI engineer to build a real-time voice agent platform for automating inbound customer support and call cen…

SIPTechnical SupportEnglish
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Telenyx webphone

Fixed-price ‐ Posted 9 days ago
$1,000
Fixed-price
Expert
Experience level

The job in one sentence: Our agents take inbound sales calls in the browser via a Telnyx WebRTC softphone, and calls are dropping/faili…

SIPJavaScriptAI-Generated CodePlatform PluginSoftware Debugging
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Less than 30 hrs/week
Hours needed
Less than 1 month
Duration
Intermediate
Experience level

Project Overview: I am a mystery caller relocating to Paraguay. I need a 100% digital cloud-based VoIP system to make outbound calls…

SIPTwilio API
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VoIP Setup for Australian Mobile

Hourly ‐ Posted 8 days ago
Less than 30 hrs/week
Hours needed
Less than 1 month
Duration
Intermediate
Experience level

I am seeking a skilled freelancer to set up a VoIP system for calling and texting from an Australian mobile. The system should be capab…

SIPVoIP AdministrationAsterisk
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