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!

Dari 30,431 ulasan, klien menilai VoIP Developers kami 4.88 dari 5 bintang.
Rekrut VoIP Developers

Filter

Pencarian saya terakhir
Filter menurut:
Anggaran
hingga
hingga
hingga
Jenis
Keahlian
Bahasa
    Pernyataan Pekerjaan
    26 pekerjaan ditemukan, seharga USD
    Cisco Switch Tasks 6 Hari left
    TERVERIFIKASI

    Cisco SG350x Health check. Pull out an audit. Currently unplugged. Needs approval before we put it back online. Copy same config as the others on the same VLANs are working.

    $115 (Avg Bid)
    $115 Rata-rata
    9 penawaran

    As a rapidly expanding company providing business VOIP services, I'm seeking a professional experienced in selling VOIP solutions to small businesses. I believe that your experience and skills will deliver the results we anticipate. Key requirements: - Deep understanding and experience with VOIP services, particularly with features such as auto attendant, call recording and conference calling. - Proven track record in successfully targeting and selling to small businesses. This project requires a focused and accountable professional who can think strategically about our service offerings and can execute a sales strategy effectively. Your work will play a crucial role in expanding our customer base. If your experience aligns with these requirements, I look forward to reading your ...

    $492 (Avg Bid)
    $492 Rata-rata
    16 penawaran
    Custom PBX System for Company 6 Hari left
    TERVERIFIKASI

    I need a PBX system tailored for a small company with one to five phone lines or extensions. I also need to customize the caller ID. Key requirements are: - Building a PBX system for 1-5 phone lines/extensions. - Customizing the caller ID. Though the specific customization features for the caller ID were not mentioned, I'm expecting the ability to at least change caller names, formats, and add additional information. The system should be easy to use, reliable, and have room for expansion as my business grows. Please only apply if you have prior experience in developing PBX systems.

    $120 (Avg Bid)
    $120 Rata-rata
    17 penawaran
    Cisco Switches (VLAN Mgmt) 6 Hari left
    TERVERIFIKASI

    Check existing config. Create VLANs, IDs and name tag based on the existing design. Configure and test Device. Then move onto the next VLAN and so on. Both Console and Web interface available. Trunk Ports required for new APs. Switches will include Stackable Sg350x. I also have a number of HP Procurves but not to worry if these are not possible.

    $85 (Avg Bid)
    $85 Rata-rata
    11 penawaran

    I'm looking for a professional who can install Asterisk PBX to facilitate a call routing system. Key Requirements: - Asterisk PBX will function primarily as a call router, modifying incoming caller ID's to the outgoing trunk DIDs. - The system should handle both incoming and outgoing calls efficiently. - The endpoint devices that will connect to the Asterisk PBX are Mobile Operator issued SIP trunks. Ideal Skills and Experience: - Prior experience in setting up and configuring Asterisk PBX systems is essential. - Proficiency in handling and routing calls effectively. - Knowledge of SIP trunks and mobile operators' systems would be a plus. Specific Requirements Requirement: A simple Asterisk PBX installed on our server. It is a voice transit facility with incoming and outg...

    $46 (Avg Bid)
    $46 Rata-rata
    7 penawaran

    We have a VoIP app in flutter, voice calling with sip and FCM setup for the push notifications, we like to have a call alert like WhatsApp calling alert that can handle both foreground and background states in Android and iOS. If somebody already worked on this type of feature, bid and connect to show a demo.

    $36 (Avg Bid)
    $36 Rata-rata
    4 penawaran

    I have Patton Smartnode which gets SIP line in (works) and needs to output to its 4 BRI ports to connect to classic PBX (Avaya IP Office 500). SIP line works BRI Configuration to connect Patton and PBX not, this is where i need help for.

    $32 (Avg Bid)
    $32 Rata-rata
    5 penawaran

    I'm searching for experienced professionals in the VoIP/PBX or communication field. The project is tailored towards a new enterprise that will initially have 11-50 users. Ideal Candidate: - Proficient in setting up VoIP/PBX systems - Prior experience in handling internal communication systems - Able to scale systems for growth - Familiarity with providing solutions that are cost-effective for new businesses Key Requirements: - Develop a reliable internal communication system - Ensure seamless functionality for 11-50 users - Set up the system in a way that allows for easy expansion in the future - Provide clear documentation for future maintenance and troubleshooting - Cost-effective solutions will be prioritized

    $419 (Avg Bid)
    $419 Rata-rata
    27 penawaran

    I'm looking for someone experienced with Asterisk to help me set up a SIP server for educational and testing purposes. The SIP server will be used with a Jio SIP trunk. Key requirements: - Configure Asterisk as a SIP server on the operating system of your choice - Set up a Jio SIP trunk - Create a demonstration of simple dialing using an open source SIP client Ideal skills and experience for this project: - Proficient in Asterisk server configuration - Experience with setting up SIP trunks - Strong knowledge of open source SIP clients - Good communication skills to help guide me through the setup and demonstration process. My budget is not very high ..

    $105 (Avg Bid)
    $105 Rata-rata
    7 penawaran

    We have a VoIP app in flutter, voice calling with sip and fcm setup for the push notifications, we like to have a call alert like whatsapp calling alert that can handle both foreground and background states in Android and iOS. If somebody already worked on this type of feature, bid and connect to show a demo.

    $56 (Avg Bid)
    $56 Rata-rata
    9 penawaran

    I'm in need of a freelancer with expertise in setting up Virtual PBX systems and CRM integration, particularly with Vitiger CRM. The primary use of this system will be for sales and marketing purposes. Key responsibilities will include, but are not limited to: - Setting up a Virtual PBX system - Configuring Vitiger CRM - Integrating the Virtual PBX system with Vitiger CRM for seamless operation - Enabling predictive dialing for 4 separate campaigns - Ensuring a smooth and efficient workflow between the PBX and CRM for sales and marketing purposes. Ideal skills for this job include: - Proficiency in Virtual PBX systems - Extensive experience with Vitiger CRM - Previous work with predictive dialing configurations - Strong understanding of sales and marketing processes - Excellent pro...

    $8 / hr (Avg Bid)
    $8 / hr Rata-rata
    10 penawaran
    PHP Code Debugging for Server-Side 4 Hari left
    TERVERIFIKASI

    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, w...

    $43 (Avg Bid)
    $43 Rata-rata
    17 penawaran

    I'm in need of a freelancer with expertise in setting up Virtual PBX systems and CRM integration, particularly with Vitiger CRM. The primary use of this system will be for sales and marketing purposes. Key responsibilities will include, but are not limited to: - Setting up a Virtual PBX system - Configuring Vitiger CRM - Integrating the Virtual PBX system with Vitiger CRM for seamless operation - Enabling predictive dialing for 4 separate campaigns - Ensuring a smooth and efficient workflow between the PBX and CRM for sales and marketing purposes. Ideal skills for this job include: - Proficiency in Virtual PBX systems - Extensive experience with Vitiger CRM - Previous work with predictive dialing configurations - Strong understanding of sales and marketing processes - Excellent pro...

    $5 / hr (Avg Bid)
    $5 / hr Rata-rata
    7 penawaran
    FreePBX SIP Trunking Setup 3 Hari left
    TERVERIFIKASI

    I'm looking for someone to help me set up a SIP trunk on my FreePBX phone system. Key Requirements: - Configuration of SIP trunking: I need you to assist in the setup of a SIP trunk on my FreePBX system. Your expertise in this area is crucial. - Connecting to a specific SIP trunk provider: I have a specific SIP trunk provider in mind, and I need you to ensure that the FreePBX system is correctly connected to this provider. Ideal Skills and Experience: - Proven experience with FreePBX phone systems and SIP trunking: I'm looking for someone who has successfully configured SIP trunking on FreePBX systems before. Please provide examples of similar work. - Familiarity with various SIP trunking providers: Your knowledge of different SIP trunking providers will be useful to ensure ...

    $492 (Avg Bid)
    $492 Rata-rata
    22 penawaran

    I'm seeking a highly-skilled Asterisk VoIP specialist for a unique project. I require expertise in Asterisk integration, VoIP configuration, and particularly in IVR implementation. KEY REQUIREMENTS: - Asterisk Integration: Full integration set up and testing needs to be completed. - VoIP Configuration: This includes configuring phone lines, extensions, and all essential VoIP functions. - IVR Implementation: The main purpose of this project is the implementation of automated IVR menus. This needs to be user-friendly and functional. The system should be capable of handling less than 50 concurrent calls. IDEAL CANDIDATE: The successful freelancer must have outstanding experience in all mentioned areas with a focus on IVR implementation. Any proven record in developing low-volume Ast...

    $217 (Avg Bid)
    $217 Rata-rata
    13 penawaran
    Cisco Packet Tracer Laboratorio 3 Hari left
    TERVERIFIKASI

    Laboratorio sobre cisco packet tracer simular una topologia

    $28 (Avg Bid)
    $28 Rata-rata
    14 penawaran

    I am in urgent need of an Asterisk developer who can work efficiently on debugging and troubleshooting. Key Tasks: - Fix call dropouts - Resolve audio quality issues - Correct failed call routing The ideal candidate for this project should have: - Strong knowledge of SIP protocols - Experience with Asterisk dial plans - Familiarity with debugging tools and logs Only developers well-versed in these areas need to apply. Achieving solid results in a timely manner is of the essence.

    $19 / hr (Avg Bid)
    $19 / hr Rata-rata
    2 penawaran
    Linux SIP Trunk Server Installation 2 Hari left
    TERVERIFIKASI

    I am looking for an experienced professional to install a SIP trunk server on a Linux system. As part of the project, you should also set up access to the live voice stream with the primary purpose of real-time transcription. Key Requirements: - Install and configure a SIP trunk server on a Linux system. - Enable access to a live voice stream for real-time transcription. Ideal Candidate: - Proficient in Linux server administration. - Experienced in SIP trunk server installation. - Familiar with real-time transcription processes. - Skilled in setting up live voice stream access. - Strong problem-solving and troubleshooting abilities.

    $19 / hr (Avg Bid)
    $19 / hr Rata-rata
    6 penawaran

    We are looking for a remote customer service agent. This position involves: (1) accepting incoming customer service calls via web based call handling application, (2) returning customer calls via the same call handling application, (3) placing non-sales outbound calls using the same call handling application, (4) completing administrative, data entry, and web research tasks. The successful candidates for this role will be able to self train using an online knowledgebase. We do not provide 1:1 training. Candidates must pass a short online quiz, as well as a phone test. This position pays $12 per hour for every hour logged into our call center application and in Ready status. This total weekly outcomes payment will be reduced by $12 PER CALL that is missed or mishandled. A "mi...

    $12 / hr (Avg Bid)
    Sorotan
    $12 / hr Rata-rata
    32 penawaran

    I'm looking for a proficient developer to set up an Interactive Voice Response (IVR) system in Twilio. Requirements: - Implementing Call Waiting and Queue functionality: My system needs to manage incoming calls efficiently, ensuring callers are placed in a queue and greeted with appropriate prompts. The ideal candidate should have: - Proven experience with Twilio: You should be well-versed in setting up IVR systems in Twilio, capable of implementing call waiting and queue functionality. - Familiarity with call center operations: Experience in managing incoming calls and understanding the importance of efficient call handling and queuing is a huge plus.

    $324 (Avg Bid)
    $324 Rata-rata
    52 penawaran
    Outbound Callcenter Agent 1 hari left
    TERVERIFIKASI

    I'm in search of a call center agent. This role would be focused on outbound calls, specifically geared towards the hotel industry Key Responsibilities: - Making outbound calls to hotels receptionists - Pitching our service and explain why they need the service Ideal candidate should have: - Excellent communication skills and speak fluent English - Ability to work independently and achieve sales targets The working hours are thurday, friday and saturday from 00:00 till 03:00 central eurpean time.

    $16 / hr (Avg Bid)
    $16 / hr Rata-rata
    35 penawaran
    webrtc proxy 19 jam left

    Preciso de um WebRTC Proxy para conectar nossos antigos sistemas asterisk em webphones. Ele tem que suportar conexões ipv4 e ipv6. Ou seja, precisamos de um Proxy que faça a conexão dos clientes WebRTC tanto ipv4 quanto IPv6 e entregue as chamadas na rede local. Precisamos de pessoas com experiência em kamailio, opensips, rtpengine, asterisk, freeswitch, MariaDB.

    $635 (Avg Bid)
    $635 Rata-rata
    9 penawaran

    I'm looking for an expert developer well-versed in Twilio and CRM systems to integrate Twilio's voice calling feature into a softphone for a desktop environment. Integrate with BREA and make it our default dialer for any phone as click to dial. It must be able to reeive and send a call. Key Responsibilities: - Integrate Twilio's voice calling feature with our existing CRM system in a manner that optimizes user experience and call quality - Ensure the softphone functions seamlessly on our desktop platform Ideal Skills and Experience: - Proven experience with Twilio's voice API - Past work on softphone setup and integration in a desktop environment - Strong understanding of CRM systems - Excellent troubleshooting and debugging skills Your expertise will aid in st...

    $203 (Avg Bid)
    $203 Rata-rata
    24 penawaran

    I need an Apple Numbers sheet that can automatically calculate the totals and include customization for specific invoice details. - Auto-calculation of totals: I'd like the sheet to automatically compute the total amount based on the items listed. - Customized invoice templates: I need the invoice to be customized to include my company logo and branding. The color scheme should also be consistent with our brand. - Specific calculations: The invoice should be able to incorporate a discount calculation and compute the subtotal amount. You should have experience with Apple Numbers and be able to create sophisticated, user-friendly invoice templates. A strong understanding of accounting principles is a plus.

    $650 (Avg Bid)
    $650 Rata-rata
    4 penawaran

    Need a skilled React Native developer ready to take on a challenge that integrates backend VOIP notifications seamlessly into both Android and iOS interfaces? Look no further! What We Need: We're seeking a talented developer to integrate backend VOIP notifications into our React Native app. Your primary task will be to ensure that users receive incoming call notifications, allowing them to interact with their device's native calling interface effortlessly. This means handling call pickup, ending calls, ringing, vibration, and other user settings. Requirements: Proficiency in React Native development for both Android and iOS platforms. Experience with integrating backend services, specifically VOIP notifications. Familiarity with OneSignal or similar notification delivery platf...

    $12 / hr (Avg Bid)
    $12 / hr Rata-rata
    17 penawaran
    Custom SIP Trunk Server Setup 9 jam left
    TERVERIFIKASI

    I am looking for an expert who can help me set up a SIP trunk server using Twilio as the SIP provider. This server will be used for both voice calling and SMS messaging. Key Responsibilities: - Establishing a SIP trunk server with configurations optimized for Twilio - Implementing call management features like Call Recording, Call Forwarding, and Interactive Voice Response (IVR) - Ensuring seamless integration of both voice and SMS capabilities - Providing recommendations for server security and performance optimization Ideal Candidate: - Extensive experience with SIP trunking, particularly with Twilio - Proficiency in configuring and customizing SIP trunk servers - Proven track record in implementing call management features such as Call Recording, Call Forwarding, and IVR - Strong und...

    $7 / hr (Avg Bid)
    $7 / hr Rata-rata
    8 penawaran

    Artikel yang Direkomendasikan Hanya untuk Anda

    If you want to stay competitive in 2021, you need a high quality website. Learn how to hire the best possible web developer for your business fast.
    11 MIN READ
    Learn how to find and work with a top-rated Google Chrome Developer for your project today!
    15 MIN READ
    Learn how to find and work with a skilled Geolocation Developer for your project. Tips and tricks to ensure successful collaboration.
    15 MIN READ