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 33,138 opiniones, los clientes califican nuestro VoIP Developers 4.9 de un total de 5 estrellas.
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    18 trabajados encontrados, precios en USD

    Actualmente estoy en la fase de desarrollo de un sistema de Call Center personalizado y necesito un desarrollador de Asterisk para desarrolar nuevo sistema desde cero - El sistema se debe crear desde cero. - Las funcionalidades específicas que se implementarán o mejorarán incluyen la integración con API para sistema de cobros, automatización de llamadas e informes y análisis de datos en tiempo real. - En cuanto a la integración de APIREST de Redsys, se espera que el sistema sincronice bbdd con los pagos que se hagan de datos de clientes, registre compras automáticamente y proporcione capacidades de seguimiento. El candidato ideal debería tener: - Amplia experiencia con Asterisk y sistemas similares. - Trabajo previo en solucio...

    $2275 (Avg Bid)
    $2275 Oferta promedio
    45 ofertas

    Crear un VoiceBOT en asterisk para automatizar la atención con Amazon Lex , el flujo es una demo de muestra con máximo 4 opciones. Se debe entregar una Wiki del paso a paso, para replicarlo en un ambiente controlado y no trabajar en ambientes de terceros, una vez entregado esto y probado se finaliza el proyecto

    $201 (Avg Bid)
    $201 Oferta promedio
    10 ofertas

    Follow this code: I urgently need a professional who can help me set up and integrate Twilio's calling functionalities with an IVR system, using Elevenlabs and ChatGPT. Key Requirements: - Implement an Interactive Voice Response (IVR) system with Voice Recognition - Enable Call Recording feature Additional Details: - The IVR system should be voice recognition-based, guiding callers through the menu without the need for DTMF input - The integration between Twilio, Elevenlabs, and ChatGPT must be smooth and seamless - The project has an urgent deadline, so time is of the essence Ideal Skills: - Proficiency in Twilio's calling functionalities and APIs - Experience in setting up IVR systems, particularly with voice recognition - Familiarity with Elevenlabs and ChatGPT is a plu...

    $135 (Avg Bid)
    $135 Oferta promedio
    26 ofertas

    I urgently need a professional who can help me set up and integrate Twilio's calling functionalities with an IVR system, using Elevenlabs and ChatGPT. Key Requirements: - Implement an Interactive Voice Response (IVR) system with Voice Recognition - Enable Call Recording feature Additional Details: - The IVR system should be voice recognition-based, guiding callers through the menu without the need for DTMF input - The integration between Twilio, Elevenlabs, and ChatGPT must be smooth and seamless - The project has an urgent deadline, so time is of the essence Ideal Skills: - Proficiency in Twilio's calling functionalities and APIs - Experience in setting up IVR systems, particularly with voice recognition - Familiarity with Elevenlabs and ChatGPT is a plus - Ability to meet ...

    $239 (Avg Bid)
    $239 Oferta promedio
    18 ofertas

    I'm looking to develop an app that can handle calls and messages across different platforms like iOS and Android. Key Features: - Call Handling: The app should be able to manage incoming calls effectively, helping me prioritize and manage them efficiently. - Message Handling: I would like to be able to send and receive messages seamlessly across platforms. - Cross-Platform Compatibility: The app should work smoothly on both iOS and Android devices. Additional Features: - Push Notifications: I'm interested in having push notifications for incoming calls and messages. - Call Recording: It would be great if the app can record calls for future reference. - Contact Synchronization: I need the app to sync my contacts across different platforms. I'm seeking a developer with a g...

    $1187 (Avg Bid)
    $1187 Oferta promedio
    56 ofertas

    As a business, we're in need of an experienced professional to work on configuring our Cisco router and establish a site-to-site VPN. You will be responsible for: - Configuring the router to enable VPN - Setting up a secure site-to-site VPN for remote access Already in place is all the required infrastructure, so we expect smooth, quick, and hassle-free setup with minimal downtime. Ideal skills include: - Expertise with Cisco systems - In-depth knowledge and experience in VPN Setup and maintenance - Understanding of network security protocols This job requires someone who can deliver efficient, effective solutions, ensuring secure, remote access for our team. Your proficiency in keeping our systems up and running will enable our business to operate seamlessly, regardless of ...

    $103 (Avg Bid)
    $103 Oferta promedio
    16 ofertas

    I'm currently working on a project that requires expertise in FusionPBX configuration. I'm having trouble with the extension setup which needs immediate rectification. 1. SSL Certificate install 2. Configure Fail2Ban 3. Configure IPTables 4. Poly (Polycom) phones won't download config from server 5. Server will not issue config 6. Configure Shared Line Appearances/Multiple Call Appearances 7. Configure SLA/MCA held calls to be able to be picked up on other phone 8. Configure SLA/MCA live calls to be barged in from other phones 9. Yealink phones do not connect 10. SIP Trunk disconnects from time-to-time 11. Create dialplan for phones so users don't have to press SEND or DIAL after typing in phone number You must be fluent in Freeswitch AND FusionPBX

    $175 (Avg Bid)
    $175 Oferta promedio
    9 ofertas
    Small office Asset Management 3 días left
    VERIFICADO

    We have one client having 2 Branches and one Head office. They want central solution to record their IT asset details inside their network, software's in PCs. They are using VSAT for network so bandwidth is limited to be use. System should capture all hardware configuration, attached devices details etc. If any new system enter their network or transfer the system from one branch to another that should be immediately intimate in email and flash in their admin portal. System Should also monitor the high bandwidth uses inside the network, open port details. The application required along with source code and implementation document. Payment will made only after successfully POC and getting the documentation..

    $1507 (Avg Bid)
    $1507 Oferta promedio
    8 ofertas

    I'm in need of a skilled CISCO router expert who can help convert our Cisco ISR4331 router into a voice gateway. The primary purpose of this conversion is to route SIP traffic for voice communication. We already have an existing SIP trunk provider, so the focus is on configuring and optimizing the router for this specific purpose. Key requirements and deliverables include: - Configuring the Cisco ISR4331 router to act as a voice gateway for SIP traffic - Ensuring seamless routing of SIP traffic - Implementing best practices for voice communication over the network - Testing and verifying the setup for medium call volume (10 to 50 calls per hour) Ideal candidates should have: - Proven experience in configuring Cisco routers for voice gateway functionality - Specific expertise in r...

    $207 (Avg Bid)
    $207 Oferta promedio
    15 ofertas
    SRP Consulting -- 8 3 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...

    $355 (Avg Bid)
    $355 Oferta promedio
    4 ofertas

    I am looking for a professional who can help me set up and support a Vicidial system for a large team of 200+ agents. The project involves: - Configuring Call Routing: The system must be able to efficiently route calls to different agents based on the defined criteria. - Implementing an IVR System: The setup should include an interactive voice response system to guide callers to the right department or agent. - Enabling Call Recording: It is crucial that the system supports call recording for quality control, compliance, and training purposes. I do not plan on using any additional telephony equipment or software with the Vicidial system. Your expertise in Vicidial administration, call routing, IVR implementation, and call recording will be highly valued. Please ensure your bid ...

    $514 (Avg Bid)
    $514 Oferta promedio
    19 ofertas
    Opensips System Setup & Management 2 días left
    VERIFICADO

    I'm looking for a freelancer with extensive expertise in Opensips and voice switches, as well as managing systems and servers. The project entails setting up an Opensips system with specifics like: - Call Routing and Forwarding: You'll need to configure call routing for efficient call management. - Load Balancing and Failover: Implementing load balancing to distribute traffic across servers and failover systems to prevent service disruption. - SIP Protocol Support: Ensure the system supports the SIP protocol for seamless communication. The ideal candidate should have experience in setting up systems comparable to RingCentral, as our system is expected to handle more than 500 concurrent calls. Your primary focus will be on the Opensips configuration and overall system management...

    $170 (Avg Bid)
    $170 Oferta promedio
    13 ofertas
    SRP Consulting -- 7 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...

    $299 (Avg Bid)
    $299 Oferta promedio
    2 ofertas

    I'm needing an Inside Sales Representative to support our SAAS business. The product is tailored for IT professionals and includes a variety of tools and solutions in the email security domain. Key Responsibilities: - Qualifying leads within the IT industry, especially those dealing with IT products. - Understanding of the specific variety of IT products our SAAS offers, including Email solutions, ATP, DLP, Bulk emailing, Archival, MDM, Ticketing, HRMS and endpoint security- cyber security. - Communicating the key features and functionalities of our product to potential clients. - Ability to close sales and meet quotas. Ideal Skills & Experience: - Proven experience in Inside Sales, preferably in the IT industry. - Good understanding of Email security, ATP, DLP, Bulk emailing, A...

    $83 (Avg Bid)
    $83 Oferta promedio
    6 ofertas

    I am in the market for a skilled developer to create an advanced telephony calling app. This application requires the ability to record calls, provide caller ID, caller number, and call destination, as well as maintain a record of call logs. Key Features: - Caller ID, Caller Number & Call Destination: The app should be able to display the caller's ID, number, and the destination of the call. - Call Recording: It is essential for the application to record calls for future reference and record-keeping purposes. - Call Logs: The app should maintain a detailed log of all incoming and outgoing calls. Ideal Skills: - Proficiency in mobile app development - Experience in telephony and VoIP technologies - Implementing call recording functionality - Knowledge of data storage and logging ...

    $158 (Avg Bid)
    $158 Oferta promedio
    21 ofertas
    PBX System Configuration 1 día left
    VERIFICADO

    I need a trained freelancer who can configure my PBX (Private Branch Exchange) system, specifically an Isabell, for a small office setup. The main objective of this project is to perform a complete system configuration for 3 extensions. Specific tasks include: - Complete Isabell PBX system configuration - Configuration of 3 telephone extensions. - Set up call forwarding - Set up voicemail - configure IVR for the three extensions with the voiceovers -Configure to be able to make calls automatically and teach us how to enter the data in CSV to be able to enter the contacts that we want to make the calls This project requires a professional with extensive experience in configuring PBX systems, particularly the Isabell model. Your understanding of telephony and call management is crucial to...

    $221 (Avg Bid)
    $221 Oferta promedio
    37 ofertas

    I'm looking for an expert to install Asterisk on Debian 12 and connect it to the SIM7600G-H module. The primary purpose of this integration is to perform real-time speech-to-text conversion on phone calls. Key Project Details: - The Asterisk installation should provide intermediate level Call Detail Records (CDR), including call status and route information. - The SIM7600G-H module is to be used for making calls through the Asterisk system. - The system must be capable of converting the speech to text in real-time during the call. Key Skills and Qualifications: - Strong experience in Asterisk installations and configurations on Debian 12. - Proficiency in integrating Asterisk with hardware modules, specifically SIM7600G-H. - Demonstrable experience in real-time speech-to-text conv...

    $160 (Avg Bid)
    $160 Oferta promedio
    4 ofertas

    I'm looking for a skilled and experienced professional who can help me transition our existing 1-5 CO lines to a SIP Channel on our Panasonic KX-NS700 system. Key Responsibilities: - Convert 1-5 CO lines to SIP Channel - Ensure setup is seamless and does not disrupt existing operations - Provide clear documentation on the setup process for future reference Ideal Skills and Experience: - Proven experience with Panasonic KX-NS700 systems - Comprehensive knowledge of SIP channel setup - Previous experience transitioning CO lines to SIP Channels - Ability to work efficiently and minimize downtime - Strong communication skills to provide clear documentation and support Additional Information: - The SIP provider for the channel setup will be pre-assigned by me, so you'll be working...

    $372 (Avg Bid)
    $372 Oferta promedio
    43 ofertas

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