VoIP, otherwise known as Voice over Internet Protocol, is a digital solution for telecommunication that utilizes the transmission of voice through the use of data over the internet. This technology is typically adopted for both commercial and privately used applications. VoIP developers specialize in programming telecommunication systems using data transmission to provide efficient services for audio and video functions.

VoIP developers are highly sought after professionals as they can create a versatile and advanced system for both desktop and mobile devices. This can include creating a more interactive experience for customers with multi-way calls, conference calls, video conferencing and voicemail systems. VoIP developers can set up your business’s phone system such as forwarding calls remotely to other devices with extensions or even communicating with customers utilizing software like Callcentric, Flowroute or Voxbone.

Here's some projects that our expert VoIP Developer made real:

  • Secured and configured private networks by implementing security measures like IP SLA, NAT and ACLs
  • Integrating SIP trunks between billing platforms, PBXs and VoIP applications
  • Setting up Postfix mail server on Linux systems with TLS authentication and encryption
  • Installing and configuring sip telephony software like ASTPP into businesses
  • Developing web applications that can send and receive SMS messages utilizing VoIP APIs

Our expert VoIP Developer have created numerous projects to help business owners manage their telecommunications in a professional bet. Our developer have an array of experience in creating a secure and reliable system customized to each client demands. If you're looking to improve or create your business’ communication system, then post your project today on Freelancer.com to hire one of our skilled professional VoIP Developers today!

From 28,716 reviews, clients rate our VoIP Developers 4.8 out of 5 stars.
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    22 jobs found, pricing in USD

    I need asterisk to do the following: 1. asterisk Dial to callee 2. Callee pick up the call and the call is answered/ bridged 3. After X seconds, asterisk will inject DTMF tone 4. Caller will not be able to hear the DTMF.

    $10 - $30
    $10 - $30
    0 bids

    Receive phone calls (with the api of Twilio, or Vonage, Telnyx, etc) for payment and the clients Pay with with Stripe or Paypal online to call at these virtual italian phone numbers Hello! I just need to set up a buy-form (to insert into a wordpress webpage) that permits me to pay in advance some credit to call some Italian phone numbers (landline or mobile is not important, the cheapest would be the best.. so for example a virtual italian phone number that cost 3 euro monthly, is better of a number that cost 30 euro monthly, also because I will need to configure multiple numbers, at least 4-5 and in future maybe more.. ) and the callers has to pay in advance (with paypal or stripe) the minutes to can call. When pre-paid the credit ends, then the phone call ends too or the credit would Se...

    $154 (Avg Bid)
    $154 Avg Bid
    7 bids

    The budget amount if yearly. Any standard or non specific proposal with the information requested below would be ignored I need a voip platform that allows me to provide virtual phone service to small companies in the USA. My customers are small new companies, most of them with very basic features request and no more than 2 user each (most of them only 1 user), Features required are: 1. private VoIP phone line (with a local US code) 2. can use to call, text, and check your voicemail from your computer or mobile device. 3. Call Forwarding to any U.S. number, 4. Outbound Caller ID Display with the small business company name 5. Ability to cap the amount of minutes per month for incoming and outgoing 6. Generate usage reports Each company should not be able to see any configuration or listi...

    $2561 (Avg Bid)
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    32 bids

    I am looking a Call center ( auto dialer software ) person who install or work on such type of system if you have experience then contact us ..

    $2177 (Avg Bid)
    $2177 Avg Bid
    13 bids

    I am looking for a freelancer who can assist me with setting up a trunk in fusionpbx for outbound termination (not inbound). I currently use as my VoIP provider outbound termination. Requirements: - Set up Fusionpbx trunk for outbound termination - Implement necessary configurations for proper functioning of the trunk - include step by step instructions of what needs to be done to accomplish it Skills and Experience: - Strong knowledge and experience in Fusionpbx and - Expertise in configuring and setting up VoIP trunks - Familiarity with Caller ID features and call routing - Ability to troubleshoot and resolve any issues that may arise during the setup process Please specify any specific requirements or features you would like to implement so that I can provide you with the best a...

    $24 (Avg Bid)
    $24 Avg Bid
    3 bids

    Install 3CX PBX on digital ocean using dataphone as a SIP provider . You must have installed on digital ocean before or used dataphone as a SIP provider. You need to successfully get the 3CX working to complete the project. Regards

    $177 (Avg Bid)
    $177 Avg Bid
    8 bids

    Project Description: - I am looking for a freelancer to provide phone number verification services. - The main focus of the project is to verify phone numbers for a specific country. - The freelancer should have experience in providing phone number verification services. - No assistance with the setup process is required, as the client only needs verification services. - The ideal freelancer should have knowledge of the specific country's phone number verification requirements and regulations. -Must be real numbers from a sim card. No VOIP

    $45 (Avg Bid)
    $45 Avg Bid
    2 bids
    Sip dialer for Android 3 days left
    VERIFIED

    I am in need of a skilled Android developer to create a sip dialer application for me. The application should have the following features: - Call recording - Call transfer - Video calling (optional, but preferred) I am unsure if I require any form of encryption for the calls, so the developer should have experience in implementing secure communication protocols. While I do not have a specific design in mind, I would prefer a user-friendly interface for the dialer. The developer should have experience in creating intuitive and visually appealing user interfaces. Overall, I am looking for a reliable and experienced Android developer who can create a high-quality sip dialer application with the aforementioned features and a user-friendly interface.

    $23 (Avg Bid)
    $23 Avg Bid
    3 bids

    Currently my calls are submitted to a TwiML App for tracking using dial verb and saving call data to db. I need somebody to expand on this and add a ring group when calling where it: 1. Plays a message or Says a message to caller 2. Ring up to 4 numbers (depending on setting) at the same time (example: 951-222-2222, 951-333-3333, 951-444-4444) 3. When a recipient picks up, Twilio will <say> message "You have a call for {company_name}, press any key to be connected" 2x 4. Recipient will have 3 extra seconds to press any key <gather> to be connected. before a disconnect 5. We continue to ring all other numbers until the first person presses a digit to be connected 6. We stop all other calls (once recipient presses a digit) 7. We play message that recipient hears &quo...

    $236 (Avg Bid)
    $236 Avg Bid
    29 bids

    Hey, I need a voip expert to install sippy softswitch on my server.

    $529 (Avg Bid)
    $529 Avg Bid
    26 bids

    Hi. Our backend is node.js and frontend is KMM. We need a setup for voice call by freeswitch. If you experience of this , i love to talk about the task. it's for application call between user (one to one)

    $537 (Avg Bid)
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    16 bids

    OpenWRT Module for a Wireless Router Specific Features: - Wireless security - Traffic shaping - VPN support Preferred Wireless Router Model: - Client will provide the router Level of Expertise Required: - Expert We are seeking an experienced developer to create an OpenWRT module for a wireless router. The module should provide an API for mobile testing features which the client will provide. This module will drive two modems embedded inside the router. The client will also provide the router for the project. We require an expert level of expertise for this project.

    $2398 (Avg Bid)
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    14 bids

    I am seeking an expert in Plivo VOIP and PBX IVR configuration to assist me with my project. Specifically, I need assistance with setting up IVR menus and configuring call routing. For call routing, I do not have a preferred strategy, so I am open to suggestions. I need someone to setup to do IVR, setup greeting message, music on hold, voicemail, hours of operation routing and etc. If you are hired, I will provide Diagrams and prerecorded audio files. You must have all necessary skills and experience working with Plivo. Calls will be routed to a mobile app that you recommend unless Plivo has one. Ideal skills and experience for this job include: - Extensive knowledge of Plivo VOIP and PBX IVR configuration - Experience in setting up IVR menus - Proficiency in configuring call ro...

    $17 / hr (Avg Bid)
    $17 / hr Avg Bid
    9 bids

    I am looking for a freelancer who can help me with the customization, configuration, and integration of Odoo CRM. Odoo CRM - 1 Database Lead provider will give us the lead from they're dashboard through API, they're dashboard will be connected to our dashboard via api. We need to be able to report the leads, For example, we got 100 leads and 10 are fake so we can mark the leads and report to the provider. also for 10 fake we won't pay. some thing like this. All client database will be connected with the main database through a connector. cleint will get the lead details from our database and we also need to get the report of the leads from client dashboard. then the report will be sent to the lead provider. Ideal skills and experience for the job: - Strong knowledge a...

    $521 (Avg Bid)
    $521 Avg Bid
    16 bids

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    I am looking for a freelancer who can help fix the issue with the Vicidial inbound carrier stats for my existing business. The specific problem we are experiencing is missing data in the reporting. We need this issue to be resolved within one day. Skills and experience required for this project: - Expertise in Vicidial and inbound carrier stats - Strong troubleshooting and problem-solving skills - Experience with data analysis and reporting - Familiarity with call center operations - Ability to work efficiently and meet tight deadlines

    $161 (Avg Bid)
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    12 bids

    I am looking for a freelancer who can help me integrate WHMCS with both VOIP systems and Broadband providers. Specific integration tasks include: - Integrating WHMCS with VOIP systems - Integrating WHMCS with Broadband providers I have specific features in mind that I would like to be included in the integration. The project needs to be completed within 1-2 weeks. Ideal skills and experience: - Experience with WHMCS integration - Knowledge of VOIP systems and Broadband providers - Ability to implement specific features in the integration - Timely and efficient completion of the project

    $126 (Avg Bid)
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    18 bids

    Project Title: Expert VOIP Developer Needed for Customer Service Conference Calling Project with CRM Integration I am in need of an expert VOIP developer to assist me with a customer service project that requires conference calling functionality and CRM integration. The primary purpose of the VOIP system will be for customer service purposes. Specific VOIP Features Required: - Conference calling Primary Purpose of the VOIP System: - Customer Service Additional Integrations Required: - CRM integration Ideal Skills and Experience: - Strong knowledge and experience in VOIP development - Expertise in conference calling functionality - Experience with CRM integration with VOIP systems - Familiarity with customer service requirements and best practices attach your previous work with VOIP ...

    $13 / hr (Avg Bid)
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    40 bids

    Project Description: I am looking for a freelancer who can help me recover operating system and set up a Cisco UC540 / UC560 system. I have the necessary recovery tools and software for my operating system. We have 5 Cisco UC540 and Cisco UC560 to be factory reset. Skills and Experience Required: - Strong experience with recovering Windows operating systems - Expertise in setting up Cisco UC540 / UC560 systems - Knowledge in troubleshooting and resolving OS and Cisco system issues - Familiarity with network configuration and management

    $136 (Avg Bid)
    $136 Avg Bid
    9 bids

    Hi, I already do website and I am a wordpress/woocommerce expert, I just need to set a website that permit to pay in advance some credit to call some phone virtual numbers (where the people can answer from them smartphone) and the callers has to pay in advance with credit card, paypal or similar, the minutes to can call. when the credit end, the nphonecall end too or the credit would get charged automatically.. I need this tye of solution, if somethign is not clear, please let me know.

    $135 (Avg Bid)
    $135 Avg Bid
    63 bids
    Vicidial Configuration -- 3 7 hours left
    VERIFIED

    I am looking for a freelancer who can help me configure Vicidial for my project. The specific features I want to configure include: - Inbound Calling - Outbound Calling - Call Monitoring I already have a Vicidial server set up, so the freelancer will not need to set up the server for me. I do not need any training or ongoing support for Vicidial. However, I do need the freelancer to enable call shifting and campaign for all users. Also i have issue wit Country campaing connection Ideal skills and experience for this job include: - Expertise in Vicidial configuration - Knowledge of inbound and outbound calling - Experience with call monitoring If you have the necessary skills and experience, please submit your proposal. Thank you.

    $170 (Avg Bid)
    $170 Avg Bid
    11 bids

    el proyecto es el siguiente nesecito una persona que pueda ser un servidor o una pagina web donde pueda ser una llamada y recibir la respuesta de esa llamada en una archivo json o en una base de datos

    $651 (Avg Bid)
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    21 bids

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