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!

จาก 26,092 รีวิว ลูกค้าให้คะแนน VoIP Developers 4.82 จาก 5 ดาว
จ้าง VoIP Developers

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!

จาก 26,092 รีวิว ลูกค้าให้คะแนน VoIP Developers 4.82 จาก 5 ดาว
จ้าง VoIP Developers

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    สถานะงาน
    15 งานที่พบ

    I need reliable cover for 15-20 inbound calls a day that come through our small MSP help-line. Every call is a technical support request, limited to network-related issues such as “my Wi-Fi dropped” or “the router’s lights are red.” I only expect basic troubleshooting—verifying connections, guiding the user through a reboot, checking whether a known outage is in place—and, when the quick fixes don’t work, booking the caller into our ticketing calendar for a remote or on-site session. You will: • Answer during my published service window (Mon–Fri, 9 AM-1 PM EST). • Follow the provided call-flow script, log the interaction in Freshdesk, and assign a priority tag. • Schedule the next step in Google Calendar with the co...

    $5 / hr Average bid
    $5 / hr การประมูลเฉลี่ย
    9 คำเสนอราคา
    Real-Time Call-Center Voice Changer
    11 ชั่วโมง left
    ยืนยันแล้ว

    I need a production-ready, real-time voice-changing application for my call-center environment. Agents must be able to switch among six high-quality U.S.-accented voices—three male and three female—without audible lag while they are on live VoIP calls. Clean, natural-sounding tone modulation is essential; the result should feel like a genuine human voice rather than a gimmick. The desktop client has to run smoothly on both Windows and macOS and sit between the agent’s headset and any softphone, SIP desk phone, or WebRTC browser tab. Latency must remain low enough that neither party notices a delay, even during high-traffic periods. An accompanying web-based admin panel lets me create, suspend, and delete user accounts, set seat limits, and pull usage reports by user, da...

    $282 Average bid
    เร่งด่วน
    $282 การประมูลเฉลี่ย
    22 คำเสนอราคา

    I need a skilled field service technician to handle troubleshooting and repair tasks for IT hardware, specifically Dell, HP, and Cisco equipment. Key Responsibilities: - Onsite troubleshooting and repair of IT hardware issues - Managing break-fix repair scenarios - 1 hour on call on-site Ideal Skills and Experience: - Proven experience with Dell, HP, and Cisco IT hardware - Strong problem-solving skills - Ability to work onsite as needed

    $32 / hr Average bid
    พื้นที่
    $32 / hr การประมูลเฉลี่ย
    5 คำเสนอราคา

    I need help running a steady stream of outbound cold calls for a sales-focused campaign. You’ll work part-time, contacting prospects from the lead list I provide and following a ready-made script that introduces our product, gauges interest, and, when possible, secures an appointment for my team. The rhythm is simple: log in to the dialer during the agreed hours, work through the calls, note each outcome in the CRM, and flag hot leads right away. You’re free to add your personal touch as long as the core talking points stay intact. What I’ll hand over: • A detailed script, objection-handling tips, and call flow • A vetted list of contacts with phone numbers and basic notes • CRM access (HubSpot) and a VoIP dialer account What I need back: &...

    $594 Average bid
    $594 การประมูลเฉลี่ย
    7 คำเสนอราคา

    Immediate need : I'm connecting our RingCentral Contact Center (NICE CXone) platform to Salesforce Sales Cloud and need an experienced developer to own the build over the next 20 to 40 hours. What it needs to do: On every inbound call, surface the matching Lead, Contact or Account to the agent If the caller is unknown, launch a guided screen that captures their details and creates a Lead on save Pass the dialed number through so the Lead is tagged with the campaign that drove the call The work: Configure Open CTI, Call Center and Softphone Layout using our existing managed package, so no custom adapter is needed. Build the Apex REST lookup endpoint CXone calls on each inbound call. Standardize phone data to +1 E.164 and set duplicate and matching rules so caller matching works. Buil...

    $152 Average bid
    $152 การประมูลเฉลี่ย
    59 คำเสนอราคา

    I have an Asterisk instance that needs a fully functional IVR linked to our SIP trunks. The core requirement is simple: callers should be greeted, routed through a concise menu, and seamlessly bridged to the correct internal extensions or external numbers. I already have the server and SIP credentials; what I need is your expertise in writing the dial-plan, recording or loading the voice prompts, and making sure calls flow reliably both ways. Configuration must be clean, well-commented, and resilient so future menu changes are straightforward. Once everything is in place I’ll run live tests with you to confirm: • IVR menu plays correctly and follows the designed call flow • SIP trunk registers and handles inbound and outbound calls without drops or codec issues •...

    $392 Average bid
    $392 การประมูลเฉลี่ย
    58 คำเสนอราคา

    We are seeking a skilled cold caller for a focused campaign targeting small, German-speaking education businesses in the EU. Your main objective will be to drive product sales by engaging decision-makers. What We’re Looking For: - Residence in an EU member state with fluent, accent-free German. - Proven experience in outbound sales calls, especially in education or similar sectors. - Independence and efficiency: from product familiarization to logging conversations in our CRM system. What We Provide: - Qualified contact list, concise script, detailed product documentation, and VoIP access. - Clear goals, reachable project contacts for queries, and short briefings to ensure clarity. What You’ll Do: - Conduct natural yet focused outreach aligned with the script. - Pinpoint nee...

    $17 / hr Average bid
    $17 / hr การประมูลเฉลี่ย
    2 คำเสนอราคา
    5G CGNAT Bypass & Remote Access
    4 วัน left
    ยืนยันแล้ว

    My 5G home connection is delivered through an Archer NX200 5G router and, like many 5G plans, it sits behind CGNAT. Because of this, I cannot reach my internal network from the outside world. The goal is clear: Remote Access. I need to log in reliably to my Computers, Smart Home Devices and Security Cameras, as well as a small PBX and a Draytek firewall. Dynamic DNS is already running with NOIP, yet CGNAT keeps every incoming request from ever reaching the LAN. What I’m looking for is a practical, reproducible way around that limitation: • A working solution that lets me initiate inbound connections (HTTPS, SSH, VoIP, etc.) from anywhere. • Detailed, step-by-step configuration on the Archer NX200 5G and any additional hardware, tunnel, or cloud service you recomme...

    $153 Average bid
    $153 การประมูลเฉลี่ย
    35 คำเสนอราคา

    I have an STC 5G connection running on a TP-Link Archer NX200 router. The connection is behind CGNAT, meaning I do not have a real public IP. I am looking for an expert to provide a solution to get a Dedicated Static Public IP so I can remotely access my internal network (Router management, SIP devices, etc.) using my noip DDNS Conditions: I cannot upgrade to a Business SIM card. I do not want to run a local PC 24/7 as a bridge. I just need a working Static IP solution that routes traffic from the outside directly into my local network. Please propose your method and how we can implement i

    $21 Average bid
    $21 การประมูลเฉลี่ย
    13 คำเสนอราคา
    Panasonic NS100 PBX Troubleshooting
    4 วัน left
    ยืนยันแล้ว

    I need an expert who knows the Panasonic KX-NS100 inside out to take over ongoing maintenance and, more urgently, to hunt down stubborn routing problems. At the moment we are plagued by ghost calls, fake trunk activity and sporadic audio drop-outs that confuse users and clog the logs. These symptoms point to deeper call-routing faults, so I’m looking for someone who can dive straight into ARS tables, COS settings, SIP trunk parameters and firmware quirks to pin down the real cause, clean it up and stop the phantom traffic for good. You’ll be given remote access via VPN or TeamViewer during our business hours so you can trace packets, watch live call traffic and adjust the configuration in real time. Once the issues are eliminated I’d like concise documentation of every...

    $23 / hr Average bid
    $23 / hr การประมูลเฉลี่ย
    28 คำเสนอราคา
    Reliable Philippines based Customer Service/ Virtual Assistant
    3 วัน left
    ยืนยันแล้ว

    YOU MUST BE FROM THE PHILIPPINES TO APPLY! Pay is $4/hour. Only respond if you agree to this pay rate. I run a small U.S.-based operation that needs hands-on help with day-to-day customer interactions. I receive a steady flow of inbound calls and emails, plus occasional outbound follow-ups, and I want every contact handled promptly and professionally. During that three-hour window you will: • answer incoming calls and place quick outbound callbacks when required, • reply to customer emails in a friendly, concise tone, and • keep our live-chat widget active so no visitor waits more than a minute. A rock-solid, high-speed internet connection is essential—dropped calls or slow chat responses won’t work for us. I currently forward calls through a VoIP line...

    $5 / hr Average bid
    $5 / hr การประมูลเฉลี่ย
    37 คำเสนอราคา

    I need to setup a VPS ready and Home Assistant. My next step is to add a rock-solid MQTT layer so I can trigger relay modules through voice commands issued from Amazon Alexa, Google Assistant, and Apple Siri. The relays must respond to simple ON/OFF requests and support dimming where hardware allows. Here’s what I need you to handle: • Recommend and install a production-grade MQTT broker on the VPS, configure secure remote access (SSL/TLS and user auth) and verify message flow with Home Assistant. • Create the necessary automations/intents inside Home Assistant so each of the three assistants recognises the devices and exposes the ON/OFF plus dimming capabilities. • Supply clean, well-commented Arduino (ESP32) code that subscribes to the chosen topics and drives ...

    $117 Average bid
    $117 การประมูลเฉลี่ย
    29 คำเสนอราคา

    Hi, I'm looking for someone to build a sip soft phone that has no dialer for outbound calls. It will only receive incoming calls. It will need to have my logo/ branding on it and can be downloaded on the Google app store..preferably for both Android and iPhone. It will need to have an incoming email function also. Budget is tight as it's going to be a freebie for our users. Thank you.

    $215 Average bid
    $215 การประมูลเฉลี่ย
    164 คำเสนอราคา
    Emotional Support Community App Development
    1 วัน left
    ยืนยันแล้ว

    I want to bring to life a safe, judgment-free space where users can lean on one another in moments of stress or loneliness. The core of the product is an emotional-support community built around real-time, one-on-one conversations that stay completely anonymous. No usernames that reveal identity, no personal data surfaced—just people helping people. Key experience pieces I need: • Anonymous chat: users start text conversations without exposing any personal details, protected by end-to-end encryption. • Anonymous calls & voice/video (VC): the same anonymity applied to audio or video so a member can talk—or simply listen—without worrying about being identified. • One-on-one matching: a quick, intuitive flow that pairs two members when either of them req...

    $130 Average bid
    $130 การประมูลเฉลี่ย
    63 คำเสนอราคา

    I want to bring to life a safe, judgment-free space where users can lean on one another in moments of stress or loneliness. The core of the product is an emotional-support community built around real-time, one-on-one conversations that stay completely anonymous. No usernames that reveal identity, no personal data surfaced—just people helping people. Key experience pieces I need: • Anonymous chat: users start text conversations without exposing any personal details, protected by end-to-end encryption. • Anonymous calls & voice/video (VC): the same anonymity applied to audio or video so a member can talk—or simply listen—without worrying about being identified. • One-on-one matching: a quick, intuitive flow that pairs two members when either of them...

    $3 / hr Average bid
    $3 / hr การประมูลเฉลี่ย
    38 คำเสนอราคา

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