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!

De 30,861 opiniones, los clientes califican nuestro VoIP Developers 4.89 de un total de 5 estrellas.
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    24 trabajados encontrados, precios en USD

    I require an expert in Asterisk and FreeSWITCH development, along with experienced system engineering skills. Specifically, I need help with: - Asterisk and FreeSWITCH development - Integrating VoIP - Setting up Call routing and IVR (Interactive Voice Response) - CTI - Skill group base call routing to agents. Apart from these, the implementation of Asterisk and FreeSWITCH clustering as well as Call Center Reporting is required. The technology stack should be Linux, PHP, MySQL along with postgresql and API knowledge. The freelancer should have considerable experience in these to meet the project's specific requirements.

    $14411 (Avg Bid)
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    I'm looking for an experienced freelancer to help me set up the SIP locally to connect incoming calls to an AI script I have. This setup has to be done on VICIdial using the QuestBlue SIP. The main objective of this project is to establish a call response system. As someone with a pre-built AI script, I need you to link it to the incoming calls on the VICIdial platform. Your expertise will include, but not be limited to: - Proficiency in VICIdial: You must have previous experience working with this platform. - Familiarity with SIP set-ups: QuestBlue SIP experience would also be a bonus. - AI Integration: Able to connect incoming calls to an AI script. Please ensure these skills align with your capabilities before bidding on this project.

    $162 (Avg Bid)
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    27 ofertas

    I currently have enhanced licenses for Cisco CUCM 11.5 and I'm seeking to upgrade to the Flex system within a month. While I've skipped explaining the specific functionalities I'm looking to add with the Flex system, ideally, the prospective freelancer should be well-experienced in transitioning from Cisco CUCM's enhanced licenses to Flex. Desired Skills and Experience: - Proficiency in Cisco CUCM 11.5 licensing and operations - Experience in upgrading to Flex system - Strong understanding of Flex system functionality options - Ability to recommend suite of functionalities to maximize collaboration, mobility and contact center features. - Ability to deliver the project within a month time frame.

    $538 (Avg Bid)
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    3 ofertas

    Se requiere una persona con experiencia configurando la libreria de Javascript SIPML5 y asterisk. Tenemos todo instalado y configurado. El softphone web se registra al asterisk, emite y recibe llamadas, pero cuando se atiende la llamada no transmite el audio. El servidor tiene instalado una VPN. Cuando el usuario se conecta a la VPN, entonces funciona el audio de la comunicación pero cuando no se conecta a la VPN entonces vuelve el problema del audio. Se requiere que el softphone funcione sin VPN, solo por internet. Version asterisk 18 OS: Ubuntu Server 14 +++++++++++ A person with experience configuring the SIPML5 and Asterisk Javascript library is required. We have everything installed and configured. The web softphone registers to Asterisk, sends and receives calls, but when th...

    $37 / hr (Avg Bid)
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    I'm in need of a skilled developer or a company that can provide me with a comprehensive voice solution for user verification and authentication. The project will involve two main components: a call voice blasting solution and a standalone voice OTP service integrated into my system. Key Project Requirements: - **User Verification and Authentication**: The primary purpose of this project is to ensure secure user verification and authentication. - **Call Voice Blasting Solution**: I require a highly customized solution for call voice blasting. It should cater to the specific needs of our user base. - **Voice OTP Service**: I need a standalone application that can provide a seamless OTP service. This application should be integrated into my existing system. Ideal Skills and Experienc...

    $159 (Avg Bid)
    $159 Oferta promedio
    8 ofertas

    I am in search of a skilled IT Administrator with expert-level proficiency in Vici Dialer. The ideal candidate will be able to manage, configure, troubleshoot, and provide support for the system. Key Responsibilities: - Setting up and configuring the Vici Dialer system - Diagnosing and resolving technical issues - Providing ongoing support and maintenance to ensure the system's smooth operation The IT Admin should have a deep understanding of the Vici Dialer system and its functionalities, and should be able to proactively address potential issues before they impact our operations. Experience in a similar role is essential. Looking for someone who is: - A Vici Dialer expert - Proactive and solution-oriented - Experienced in IT administration - Excellent in communication and proble...

    $124 (Avg Bid)
    $124 Oferta promedio
    7 ofertas

    I'm in need of an expert who can help install and set up an Alcatel PBX system for a medium-sized enterprise. The project also involves integrating this PBX system with VoIP services. This will be remote project, our team will give you access from the site. Key Responsibilities: - Configuration of Alcatel PBX system OXO408 - Integration of the PBX system with VoIP services along with call recording. - Integration with existing Cisco IP Telephony Ideal skills for this job include: - Profound understanding of Alcatel PBX systems. - Experience with VoIP services integration. - Prior work on medium-sized enterprise deployments. Your expertise in these areas will help us to establish a reliable communication system for our business, ensuring seamless connection with our clients and wi...

    $148 (Avg Bid)
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    5 ofertas

    I'm seeking someone to handle incoming calls and text messages for my business and schedule appointments. Key Responsibilities: - Answering incoming calls during business hours (9am-6pm) - Collecting essential information from callers, including their name, phone number, the service they're interested in, and their preferred date and time for an appointment Ideal Skills and Qualities: - Excellent communication skills and phone etiquette - Organized and detail-oriented - Previous experience in customer service or appointment scheduling would be advantageous. The successful candidate should be able to manage calls professionally and efficiently, ensuring that all relevant information is gathered accurately and appointments are scheduled in line with our availability.

    $5 / hr (Avg Bid)
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    I need a virtual Indian mobile number service that comes with key features like call forwarding, SMS forwarding, and voicemail. The critical functionality this service should have is call-based OTP verification. This OTP verification should be facilitated by an automated voice message that will provide users with the OTP. While there hasn't been a need for additional features such as an OTP recall option, multilingual support or a customizable message template, I would definitely prioritize a service that delivers on prompt and seamless OTP verification. Freelancers with prior experience developing or integrating similar services will have a distinct advantage. Crucial skills for this project include experience with VoIP services, OTP systems and automation. Understanding of India...

    $24 (Avg Bid)
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    8 ofertas
    Remote Point of Call Coordinator 3 días left
    VERIFICADO

    Ongoing weekly work opportunity up to 60 hours per week I'm looking for a dedicated professional who can serve as the primary point of contact for my company, overseeing both customer support and team coordination. More specifically, I need someone who can assist in setting up a system that will: - Enable VoIP calling capabilities: You'll be responsible for setting up a system that can make calls to my customers from your country, but display an Australian number. - Schedule and Calendar Integration: You'll be in charge of setting daily schedules for teams, ensuring everyone's tasks are balanced. - You will be required to answer phone calls send text messages to team and customers for up to 50 hours per week. - you will need to be the point of contact for all team or...

    $164 (Avg Bid)
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    24 ofertas

    I'm in need of a seasoned salesperson with expertise in telecommunications sales, excellent interpersonal skills, and a solid understanding of VoIP systems, to drive sales of our secure landline VoIP phone system to United States small and medium businesses. Key responsibilities include: - Inside and outside sales activities to potential small business customers - Conducting engaging remote and on-site product demonstrations - Handling objections and closing the sale The ideal candidate should have: - Prior experience and a successful sales track record in the telecommunications and/or cybersecurity industry - Exceptional communication and negotiation skills - A solid understanding of landline phone systems Your role will be pivotal in boosting sales and our presence in the small b...

    $140 (Avg Bid)
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    13 ofertas

    I'm in urgent need of a talented developer with significant experience in integrating multiple Twilio features into websites. This project includes: 1. **SMS Messaging:** Incorporation of Twilio's SMS messaging feature into the website for automated notifications and communication processes. 2. **VOIP Calling:** The website needs in-built VOIP calling capabilities, ideally, using Twilio's services. 3. **Video Conferencing:** We also need effective implementation of Twilio's video conferencing service on the website to allow online meetings and webinars. While the website's build platform is proprietary and not aligned with any typical frameworks, the successful candidate should exhibit versatility in dealing with various platforms and have expertise to quickly gr...

    $150 (Avg Bid)
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    I need an expert in networking, VOIP, and server administration to handle various ongoing tasks in our data centers. Key Tasks: - Network Configuration: You'll be responsible for setting up and maintaining our network infrastructure. - Troubleshooting: Whenever there are network, VOIP or server issues, you should be able to troubleshoot and resolve them efficiently. - VOIP Engineering and Troubleshooting: You'll be responsible for improving our quality and security around our VOIP services in our data centers and customer sites as well as troubleshooting VOIP issues. Your Responsibilities: - Engage in network configuration and maintenance, ensuring optimal performance. - Efficiently troubleshoot network, VOIP and server issues as they arise. - Implement VOIP solutions as part ...

    $213 (Avg Bid)
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    33 ofertas
    SRP Consulting -- 6 2 días left
    VERIFICADO

    We are looking for consultants - Consultant preferred from India. 1) Consultant - SRP Experience in working with development/implementation of SCP and SRF. Experience in handling interfaces of SCP SRF like INAP, SIP, Webservices, Websockets WebRTC (in the context of SCF and SRF) ISUP over SS7 Experience in Dialogic API for SS7 and INAP Experience in using JSS7 API from RestComm or it's variant of Mobius JSS7 or any of the varient IVR implementation with Freeswitch on SS7 Knowledge and work experience on YATE SS7 implementation. Anyone with following expereince and skills also may apply Consultant - CRBT worked in CRBT and similar products Having knowledge in the following protocols a) INAP over SIGTRAN/SIP b) SIP/RTP c) ISUP over E1 3) M3UA over SIGTRAN Knowledge on working with Fr...

    $297 (Avg Bid)
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    3 ofertas

    We're in need of an IT consultant who has a solid background in working with Verizon tech support. Our 15-year-old business mobile number has been experiencing accessibility issues and we are looking to "re-secure" it so that we can port it to a VOIP service for more advanced features and services. Key Requirements: - Experience with Verizon tech support: Ideally, the freelancer should have hands-on experience in dealing with Verizon tech support, particularly in the context of mobile number security issues. - Knowledge of VOIP services and porting: Understanding of how VOIP services work and experience in porting numbers is a must. - Proven track record in IT consultancy: The ideal candidate should have a proven track record in IT consultancy, particularly in the cont...

    $588 (Avg Bid)
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    21 ofertas

    In search of a multi-talented receptionist who can handle both inbound and outbound calls, helping to direct customer queries and represent our business in a professional, polished manner. What You’ll Do: - Answering incoming calls - Transferring calls to appropriate departments or individuals - Taking messages accurately - Providing basic information to callers -Sending out emails with quotes tailored to the caller's location and corresponding prices in that area. - Maintaining a professional demeanor and clear communication skills. -With close to American accent Please include examples of past work (if any) in your application to give me a clear idea of your capability and fit for this job. Also please send me a sample voice recording using vocaroo and share me the link

    $5 / hr (Avg Bid)
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    Whats-2-Pbx 1 día left

    Creazione di un software che da un lato dialoghi tramite AMI (Asterisk management interface) con un centralino e dall'altro in base a delle condizioni impostabili, invii del messaggi tramite un gateway whatsappa già pronto chiamato che permette di inviare (pagando) messaggi illimitati tramite WhatsApp. inoltre questo software deve poter inviare dei messaggi anche da una lista di numerazioni che gli si fanno caricare.

    $2391 (Avg Bid)
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    I'm looking for an OpenSIPS expert with comprehensive knowledge in call routing. currently we can able to work with opensips but have 2 issued, I need Expert opensips for support me config Opensips: 1. Config Redirect module uac_redirect - currently we have issued when A call B, and B ring 180, after that B refer call to C, call not reach to C - I'm follow opensips Docs we have to config uac_redirect but i try with no luck 2. We use media server is Freeswitch, how can i pass a variable to Freeswitch, i try add header follow format: X-Variable, sip_h_X-Variable but in luascript of FS, can not get this variable

    $174 (Avg Bid)
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    I'm seeking a skilled developer to create a versatile VOIP softphone app, compatible with both iOS and Android devices. Key Features and Functionalities: - Video calling - Conference calling - Ability to send and receive SMS & MMS messages - Auto provisioning function - In-app address book Further, ensuring seamless integration with APIs is a must, as well as a functionality syncing with an address book or contacts. The ideal freelancers for this project would have solid experience in iOS and Android app development, with special emphasis on communication apps and certificate pinning. OPENSIPS knowledge + Knowledge in API integration and VOIP technology is highly essential. Your portfolio showcasing related projects will highly increase your chances of being selected. Addition...

    $34 / hr (Avg Bid)
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    I'm looking for a FreePBX expert to help configure the Sticky Agent feature on my system. Key Requirements: - Configure Sticky Agent - Route call to the same agent who answered previously. - If that agent are unavailable, then route to his VM. Call Flow: - Inbound Route - Queue - Static Agent Ideal Skills and Experience: - Expertise in FreePBX, specifically version - Only apply if you have done this previously. My server is live, hence no experimenting. Budget $50

    $146 (Avg Bid)
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    When importing customers via CSV file in ASTPP version 6.0, both postpaid and prepaid customers balance always uploads 0. The task is to find the corresponding php file/path on the server and correct it, so that the balance uploads correctly when uploading the customers on the ASTPP both for prepaid and postpaid customers. Positive balance must upload as positive balance. Negative balance must upload correspondingly. 0 uploads 0. You need to make a detailed document how to do that on any ASTPP server, so that someone without technical knowledge takes the document, follows it and gets the same working on the other ASTPP server. Example of the document: Someone from our side will try to upload customers on the provided server to make sure it works, if yes, then we will take your document, ...

    $78 (Avg Bid)
    $78 Oferta promedio
    27 ofertas
    SRP Consulting -- 5 13 horas left
    VERIFICADO

    We are looking for consultants - Consultant preferred from India. 1) Consultant - SRP Experience in working with development/implementation of SCP and SRF. Experience in handling interfaces of SCP SRF like INAP, SIP, Webservices, Websockets WebRTC (in the context of SCF and SRF) ISUP over SS7 Experience in Dialogic API for SS7 and INAP Experience in using JSS7 API from RestComm or it's variant of Mobius JSS7 or any of the varient IVR implementation with Freeswitch on SS7 Knowledge and work experience on YATE SS7 implementation. Anyone with following expereince and skills also may apply Consultant - CRBT worked in CRBT and similar products Having knowledge in the following protocols a) INAP over SIGTRAN/SIP b) SIP/RTP c) ISUP over E1 3) M3UA over SIGTRAN Knowledge on working with Fr...

    $280 (Avg Bid)
    $280 Oferta promedio
    3 ofertas

    We are seeking a skilled and experienced freelance software developer to integrate OpenAI's Whisper technology into our existing VoIP phone system to enhance our customer support services. The successful candidate will be responsible for developing a system that enables Whisper to verbally communicate with customers over the phone, providing them with support and answers to their queries in real-time.

    $138 (Avg Bid)
    $138 Oferta promedio
    108 ofertas

    I'm seeking an expert with Nice Incontact IVR system to improve my current setup. - Simplify Call Flows: We currently have 10-20 call flows which need to be simplified to enhance customer experience and boost efficiency. - Voice Recognition Improvement: The system's voice recognition capabilities need upgrading to ensure a seamless communication process for customers calling in. - Application Integration: The final task would involve the integration of the IVR system with other applications to optimize functionality. The ideal candidate should have proven experience with Nice Incontact, call flow design, voice recognition technology as well as system integration. Understanding of customer service operations will also be an added advantage. Your job will be to streamline and...

    $33 / hr (Avg Bid)
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    35 ofertas

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