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 32,274 reviews, clients rate our VoIP Developers 4.89 out of 5 stars.
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    I'm looking for a professional who is experienced in configuring dial plans for my Issabel PBX system. Key requirements: - Experience: I'm looking for freelancers who are proficient in setting up dial plans for Issabel PBX systems, - Specific Functionalities: The primary task involves setting up the dial plan to allow calls to 1 local and 3 international destinations. Ideal Skills: - Proficiency in Issabel PBX - Experience in setting up dial plans for single office setups - Experience in configuring Local international dialing in Issabel PBX I am offerring $10 for this task and I want it to be done within the hour. Make sure you dont quote anything more than $10. It's a waste of time. Please respond if you have time to set up this dial plan right away.

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    I'm looking for a skilled professional who can help me implement and configure an Asterisk server for call center functionality. Key requirements: - Implementation and configuration of an Asterisk server from scratch (as we do not currently have it installed). - Prior experience in setting up call center functionality is a must. The features that are most important to our call center functionality include: - Automated call distribution (ACD) - Interactive voice response (IVR) - Call recording Your past experience with similar implementations, as well as your understanding of VoIP technologies, will be crucial. Please provide details of your relevant experience in your proposal.

    $1200 (Avg Bid)
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    Project Overview: I am seeking an Asterisk PBX developer who can fully customize our phone system to best suit our needs. The ideal freelancer for this job should be an expert in: Custom configuration of Asterisk PBX VoIP trunking setup Integrating third-party systems such as CRM with Asterisk PBX We are looking for an experienced VoIP engineer to set up an Asterisk PBX system integrated with a UC2000-VG-32T GSM/5G gateway. The UC2000-VG-32T will be configured by the supplier, and the freelancer will need to coordinate with the supplier to ensure seamless integration and functionality with the Asterisk PBX system. The setup will support 100 local agents and 250 remote agents, handling both voice calls and SMS. Key Tasks and Features: One of the key tasks will be to integrate our in-house...

    $50 / hr (Avg Bid)
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    I am looking for a professional who can help me with my VoIP setup. I have a Zoiper Android app that needs to be connected to a VoIP service to increase my privacy and anonymity. This project is focused on the caller ID feature, specifically the need to turn it into a free one. Key requirements: - Connect Zoiper to VoIP: The freelancer should be able to establish a reliable connection between my Zoiper app and a VoIP service. - Caller ID Customization: The most crucial aspect of this project is to turn the caller ID into a free one. This requires a certain level of technical expertise. - Region Support: While I do not have any specific requirements for region support, the chosen freelancer should be able to work with global coverage. Ideal skills: - Experience with VoIP systems and se...

    $346 (Avg Bid)
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    I'm seeking an expert to provide step-by-step instructions on installing FreeSWITCH PBX on AWS. All the documentation that I have found online has failed.

    $264 (Avg Bid)
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    I've a Jio mobile number and I want it to receive incoming calls via Asterisk on my shared hosting. This setup should include IVR and PBX functionalities. Furthermore, I'd like it to integrate with mobile apps like Zoiper, Linphone, and Bria. Further, I would like the complete system to run on zero budget without any third-party paid services. To be considered for this project, freelancers should have relevant experience with Asterisk and integrating it with mobile applications. A successful application will demonstrate: - Previous experience with Asterisk installations and configurations - Experience with setting up IVR and PBX systems - Familiarity with mobile app integration, particularly with Zoiper, Linphone, and Bria The main goal for this setup is to enhance customer su...

    $210 (Avg Bid)
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    I am looking for someone to manage our Slybroadcast campaigns and integrate it into Salesforce. Key Requirements: - Managing More than 10 voice message campaigns per month - Automating voice message campaigns - Tracking campaign performance within Salesforce - Syncing contacts between Slybroadcast and Salesforce I already have a Slybroadcast account, and the ideal candidate will have experience with both Slybroadcast and Salesforce. They should be able to seamlessly integrate the two and ensure a smooth operation of voice message campaigns. The ultimate goal is to streamline and automate our campaign processes.

    $27 / hr (Avg Bid)
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    I finished GOautodial ISO install - - I need the hostname configured to be working as I can't access GUI - I need carrier configured - I need firewall configured - I need SSL installed

    $33 / hr (Avg Bid)
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    I'm looking for a skilled professional to help implement a comprehensive VoIP system in my organization. Key Requirements: - Voice Calling: This will be a primary function of the system, so proficiency in voice call setup and management is crucial. - Video Calling: We'd like to incorporate video calling capabilities for select users, improving the quality of communication. - Instant Messaging: Our system needs a robust instant messaging feature to facilitate quick and efficient internal communication. Additional Requirements: - Scalability: The system should be designed to grow with our needs, accommodating a potential increase in users and usage. - Security: The utmost importance must be placed on security measures, ensuring our communications are private and protected at all...

    $849 (Avg Bid)
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    I'm in need of a professional who is well-versed with Pipedrive and can help me with a series of tasks related to data management, workflow automation, customization, and integration with other platforms. Key Responsibilities: - Organizing existing data in an efficient and user-friendly manner. - Setting up workflow automation to streamline processes and save time. - Customizing Pipedrive to cater to our specific business needs. - Integrating Pipedrive with other platforms or tools to enhance its functionality. Primary Goals: - Efficiently manage and monitor our sales pipeline. - Improve lead tracking and the follow-up process. - Make use of Pipedrive's performance analytics to enhance our sales strategy. Ideal Skills: - Extensive experience in working with Pipedrive. - Profic...

    $240 (Avg Bid)
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    In this project, we are seeking UCaaS experts who can efficiently build a cost-effective system tailored for a sizable group of over 100 users. Here are the key elements your proposition should address: - Cost Savings: The main goal is to cut costs. Do your solutions guarantee substantial savings without compromising quality? - Wide Coverage: While not every feature is deemed critical, suggest how the common UCaaS features like call control, conferencing, and instant messaging can be incorporated economically. The perfect candidate should have: - Extensive experience in UCaaS systems - A proactive approach to cost-cutting strategies - Ability to handle projects for larger teams - Track record of creating cost-effective strategies without excluding necessary features. Together, we'l...

    $32 / hr (Avg Bid)
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    I am looking for a talented developer to help me build a Minimum Viable Product (MVP) that will serve as a powerful tool in attracting investors. Key Features: - User Registration and Login: The MVP should be easy to access and use, with a simple yet secure registration and login system in place. Since the MVP is intended to be used as a tool for pitching to investors, it is crucial that it is not only functional but also attractive and user-friendly. I'm looking for a developer who can combine necessary functionalities with an appealing design that can demonstrate the value of the product effectively. Ideal Skills and Experience: - Proficiency in web application development - Experience in creating user registration and login systems - Knowledge in creating appealing and user-...

    $3484 (Avg Bid)
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    I need a skilled Freeswitch developer to enhance the functionality of the eavesdrop feature The current function of eavesdrop is: - Admin calls a feature code that contains the extension number of the user they want to monitor - Admin can listen to the phone call - When the remote extension hangs up the call, the admin is also hung up on - I read across forums that you can somehow attach the eavesdrop function to a conference bridge in order for the admin to be able to stay on the eavesdrop feature code for several hours. The conference bridge will then "activate" itself whenever the monitored user places or receives a phone call Key Details: - **Current Problem:** Admin gets hung up on randomly while eavesdropping. - **Desired Change:** Admin should be able to eavesdrop with...

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    I need an experienced professional to develop a robust call-blocking system for Twilio. The system should effectively block all telemarketing calls as well as robocalls. Ideally, the system should function across multiple platforms, including mobile, landline, and VoIP service. Key Factors: * A wide-reaching blocking feature should be established to keep out all robocalls and telemarketing calls. * The system should operate seamlessly across mobile phones, landline phones, and VoIP services * I don’t require any form of logging or recording for the blocked calls. Skills and Experience: - Experience in developing similar applications - Strong knowledge of call-blocking protocols and systems - Understanding of VoIP services, mobile and landline telephony functions Simple way to ad...

    $237 (Avg Bid)
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    I'm in urgent need to troubleshoot and fix errors in my Vital PBX system. If you're an expert in this area and have immediate availability, I'd love to hear from you. Key Requirements: - Troubleshooting and error fixing: I need someone who is proficient in identifying and correcting issues within the Vital PBX system. - Urgent availability: I require your immediate attention; the task must be completed within 3 days. - The voicemail is not working, but we also want to receive the voice recording as text in the email - We want to send the client a text message during the call. First we need the client to opt in and then the link to a quote form. Ideal Skills & Experience: - Proven experience with Vital PBX setup and troubleshooting. - Strong knowledge of SSH and root...

    $248 (Avg Bid)
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    I'm looking for an experienced freelancer who can set up my Android phone with the Zoiper app in a way that will allow me to customize my caller ID. Key Requirements: - I'm using an Android phone and the Zoiper app for my calls - I need the caller ID to be customizable - The main purpose for this customization is personalization, so I want to be able to change it before making a call Ideal Skillset: - Proficient in Android development - Experience working with VoIP applications, particularly with customizing caller ID features - Understanding of privacy and data protection protocols - Strong problem-solving skills and attention to detail This project is primarily to enhance the personalization of my calls, so a creative approach in designing this solution would be appreciated...

    $29 / hr (Avg Bid)
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    I need to set up Zoiper on my Samsung Galaxy smartphone for the first time, and require help in ensuring the caller ID can be easily changed. Key Responsibilities: - Set up Zoiper on a Samsung Galaxy smartphone ensuring all configurations are accurate - Implement a feature or setup to allow easy modification of the caller ID Ideal Skills and Experience: - Proficient in smartphone configurations and setup - Experienced with Zoiper or similar VoIP software - Understanding of caller ID configurations in VoIP systems - Excellent troubleshooting skills - Strong communication skills for effective guidance on how to change the caller ID This is a relatively simple task, but I need someone who can ensure it's done correctly and can explain how to make future adjustments.

    $59 / hr (Avg Bid)
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    I'm in need of a skilled professional who can help us find and configure an auto-dialer solution for our call center. Here are the key details: - The number of agents in our call center is between 11-50 members, so the solution should be able to handle a medium-sized team. - We're using the Zoiper platform as our base for the system. - The main functionality we're looking for is an auto-dialer that can distribute calls automatically to available agents as soon as the call starts ringing. Ideal skills and experience for this project includes: - Proficient in call center technology and software, preferably with experience in Zoiper-based systems - Experience in configuring and setting up auto-dialer systems - Familiarity with solutions for call distribution and real-time mo...

    $147 (Avg Bid)
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    Tenho o FreePBX na versão 17.0.16 e o Kommo como serviço em núvem. Quero fazer a integração para que os usuários da Kommo possam: Serviço VoiP totalmente personalizável Ligar diretamente para Kommo Registrar e reproduzir chamadas em cartões de lead O cartão de Lead é aberto durante uma chamada Chamada redirecionada automaticamente para o gerente responsável A princípio quero utilizar o aplicativo PHP disponibilizado pela Kommo para a integração, sem utilizar o conector Itgrix. Do lado do FreePBX, já foi configurado: HTTPS Certificado público via Let´s Encrypt Gravação de chamadas Publicado o arquivo no servidor VoIP Preciso de profissional para aplicar...

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    Possuo um hardware e gostaria de instalar / configurar uma distro para fazer a discadora rodar em meu Callcenter.

    $241 (Avg Bid)
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