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!

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    Consultor Asterisk 18 - PJSIP 6 siku left
    DHIBITISHWA

    Requiero configurar una troncal PJSIP en servidor con asterisk 18 y una troncal SIP en un servidor Asterisk 11, hay que realizar ambas configuraciones para dejar funcionando el servidor de telefonía.

    $35 (Avg Bid)
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    2 zabuni

    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...

    $26 (Avg Bid)
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    7 zabuni
    Remote Point of Call Coordinator 6 siku left
    DHIBITISHWA

    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...

    $156 (Avg Bid)
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    9 zabuni

    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...

    $126 (Avg Bid)
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    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...

    $149 (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 ...

    $221 (Avg Bid)
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    24 zabuni
    SRP Consulting -- 6 6 siku left
    DHIBITISHWA

    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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    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...

    $571 (Avg Bid)
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    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

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    Whats-2-Pbx 4 siku 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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    13 zabuni

    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

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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, ...

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    SRP Consulting -- 5 3 siku left
    DHIBITISHWA

    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)
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    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.

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    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...

    $34 / hr (Avg Bid)
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    Custom VoIP System Development 1 siku left
    DHIBITISHWA

    Good day, everyone. We are seeking a VoIP system developer to create the following features from scratch for our system: We are VoIP resellers to call centers, BPOs, and marketing companies. Currently, we have open-source VoIP billing software that can only perform billing tasks. We are looking to provide a comprehensive solution to our clients: 1. A customer portal accessible from our website with a direct sign-up option. 2. The portal should allow customers to operate on a pay-as-you-go system, enabling them to recharge or pay their bills directly from the portal using various payment methods such as cards, bank transfers, or cryptocurrencies. 3. We aim to integrate a dialer system within our customer portal, allowing clients to create webphones for their agents/users and utilize othe...

    $185 (Avg Bid)
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    SRP Consulting -- 4 1 siku left
    DHIBITISHWA

    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...

    $378 (Avg Bid)
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    3 zabuni

    I need an expert who can modify my wife's Huawei Chinese phone to be fully compatible with American apps and servers. This is crucial as the phone was an expensive purchase and we can't afford for it to be useless in America. Key Requirements: - Experience in programming Huawei phones - Strong knowledge of the Android operating system - Ability to modify apps and servers to be compatible with the Huawei platform. The successful freelancer should have a track record of similar projects and provide a portfolio or examples of past work. Please do not hesitate to reach out for further information.

    $512 (Avg Bid)
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    I'm looking for an experienced developer who can integrate Twilio VOIP into my international calling website. Key requirements: - Incorporating Twilio VOIP service - Ensuring seamless functionality and user experience - Implementing necessary security measures to protect user data Experience with VOIP integration and Twilio is a must. Please provide examples of similar projects you have successfully completed.

    $601 (Avg Bid)
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    I am looking for an English-speaking freelancer who can help us with rescheduling appointments for our medical spa. Your primary role will be to contact clients who have previously scheduled an appointment but didn't show up. Key Responsibilities: - Make outbound calls to clients to reschedule their missed appointments. - Provide excellent customer service and handle customer complaints or issues effectively. - Maintain a high level of professionalism and integrity throughout the communications. Ideal Skills and Experience: - Proven experience in making sale calls or appointment setting. - Strong persuasive skills is a must - you should be able to convince clients to reschedule their appointments. - Excellent customer service skills and a positive attitude. - Familiarity with VoIP s...

    $3 / hr (Avg Bid)
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    I need a freelancer with strong customer service skills to manage inbound calls, focusing primarily on customer inquiries. Your tasks will include answering questions, addressing customer concerns, and ensuring a positive customer experience. Knowledge of the Moovs system is required. • Type of service: Inbound calls only • Call purpose: Mainly customer inquiries • Specific Software: Must be familiar with Moovs Experience in customer service roles and a good understanding of the Moovs platform would be highly beneficial. Excellent communication skills and a problem-solving attitude are essential. A customer-centric approach, patience, and kindness are necessary.

    $206 (Avg Bid)
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    22 zabuni

    I'm seeking an expert in SIP and VoIP to assist me with various issues within my PortaOne system. Key Requirements: - Extensive knowledge of SIP and VoIP solutions, particularly with PortaOne - Proficiency in call routing and configuration for diverse scenarios - Proven experience in troubleshooting and resolving various issues - Clear communication skills with the ability to provide detailed explanations and solutions.

    $35 / hr (Avg Bid)
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    11 zabuni

    I need a technical consultation for current project to migrate UCS Manager to Cisco Intersite. Please be someone with a expertise level.

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