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!

Från 24,018 betyg, betygsätter kunder vår VoIP Developers 4.9 av 5 stjärnor.
Anlita 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!

Från 24,018 betyg, betygsätter kunder vår VoIP Developers 4.9 av 5 stjärnor.
Anlita VoIP Developers

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    17 hittade uppdrag
    VoIP Audio Reliability Fix
    6 dagar left
    Verifierad

    Our production VoIP app runs on Kamilio/Asterisk is suffering from three clear symptoms: call dropping, audio quality issues. The trouble appears only on a fraction of calls rather than every connection, so I need someone who can track down the underlying triggers—whether they sit in the signalling layer, jitter buffer, codec choice or network traversal logic—and then eliminate them. You’ll start by reviewing the current SIP/WebRTC stack, server logs, packet captures and any client-side metrics I provide. From there, pinpoint the root cause and apply code, configuration or infrastructure tweaks to stabilise audio flow. Deliverables • Detailed diagnosis outlining where packets or media streams fail • Fixed client or server code / configs ready for deploym...

    $228 Average bid
    $228 Snittbud
    5 bud

    I manage a stream of retail invoices that must stay current, and I need a diligent hand to keep the cash flowing. Once a week you will pick up the phone, contact each client whose payment is due or approaching, and deliver a friendly yet firm reminder that keeps the relationship positive while securing a commitment to pay. A confident female voice is preferred because past experience shows it builds quicker rapport with this customer base. You’ll call through my dedicated VoIP line (or yours if you prefer), document every conversation in our shared Google Sheet right after the call, and highlight any disputes or red flags for immediate follow-up on my end. Familiarity with collections, customer service, or accounts receivable in the retail sector will help you hit the ground running...

    $92 Average bid
    $92 Snittbud
    11 bud

    Project OverviewThe Voice-Controlled Home Automation system allows users to control home devices (lights, fans, appliances) using voice eliminates the need for manual switches and provides smart home for:Smart home enthusiastsOffice automationDIY projects

    $21 Average bid
    $21 Snittbud
    17 bud
    Asian Sales Cold-Call Campaign
    5 dagar left
    Verifierad

    I’m launching a direct-sales push across several Asian markets and need a seasoned telemarketer who already has a reliable international calling setup (VoIP or hosted dialer) in place. You’ll be cold-calling fresh leads that I supply, moving prospects through the sales script, and converting them into paying customers. Because the focus is on new outreach rather than follow-ups, I’m counting on your persistence, tone control, and ability to handle gatekeepers in multiple time zones. To keep us aligned, I’ll provide: • A detailed product briefing and sales script • A daily lead list in spreadsheet format What I need from you: • Live outbound calls during the appropriate business hours for each target country • Real-time note-taking in the ...

    $94 Average bid
    $94 Snittbud
    4 bud
    Set Up U.S. Google Voice
    5 dagar left
    Verifierad

    I need Google Voice fully configured for personal use in the United States so my small team (no more than five people) can start texting, calling, and receiving calls right away. Here’s what I expect: • Obtain and activate one or more U.S. Google Voice numbers. • Configure calling, text messaging, and basic call-handling options so every team member can use the service on desktop and mobile. • Walk me through any verification steps, port-in requirements, or carrier settings that may pop up. • Show me how to manage users, assign numbers, and control permissions so we stay organized as we grow. Everything should be ready for live use—no half measures or work-arounds—so we can focus on talking to clients instead of wrestling with setup scree...

    $19 Average bid
    $19 Snittbud
    11 bud
    3CX Developer
    5 dagar left

    looking for someone who knows 3CX and can assist with Call Flow and Call Flow Designer. i need sommebody that he speek French

    $487 Average bid
    $487 Snittbud
    3 bud

    I am shifting my career fully online and want to secure a remote customer-service position where I’ll be handling both chat and phone support, working with a blend of numerical and textual data. I’m looking for targeted, hands-on assistance that takes me from where I am now—an eager candidate—straight to a signed offer. Here is what I need from you: • Refine or rebuild my résumé and LinkedIn profile so they speak directly to hiring managers in the customer-service space. • Identify real, current openings that match my experience level and skill set, focusing on roles that combine chat and phone support responsibilities. • Tailor application materials for each posting and submit them on my behalf (or prepare everything so I can subm...

    $538 Average bid
    $538 Snittbud
    13 bud

    We are a USA-based digital services company located in Milwaukee, Wisconsin, in business for over five years, specializing in web development, logo/branding design, and AI-driven solutions. We are seeking a long-term Operations Manager to take full responsibility for the daily operations of the development side of the company. You will manage workflows, oversee production, communicate with clients, coordinate contractors, and ensure smooth delivery of all projects. I will handle all marketing and client acquisition — your role is to run operations and make sure every project moves efficiently from start to finish. This is a contractor role with percentage-based compensation, not employment. Compensation You will receive: ➡ 50% of the net revenue from ALL projects produced by the ...

    $14 / hr Average bid
    $14 / hr Snittbud
    131 bud

    Our GoHighLevel workspace needs a full-featured Affiliate Manager configured from scratch. The goal is to start inviting existing customers as partners, issue unique referral codes, and track every click, lead, and sale. Do not think we need automated payouts at this time. Must have experience with gohighlevel affiliate manager. Here’s what I expect from you: • Configure the Affiliate Manager so it tracks each affiliate’s performance, automatically generates and assigns referral codes, and triggers payout workflows we can edit later. • Document the entire flow in clear, step-by-step instructions (Google Doc or PDF) that anyone on my team can follow. • Record a concise screen-share walkthrough of the key dashboards and settings. • Host two live, 3...

    $462 Average bid
    $462 Snittbud
    76 bud

    I generate a steady stream of residential real-estate leads—people who have shown interest in buying or selling—but right now I only have their basic contact details. I need a confident cold caller who can pick up the phone, engage each prospect, qualify motivation, and move them to the next step: booking a listing appointment or a buyer consultation with me. You will handle the full call cycle: craft or refine a script that works for residential sellers and buyers, make the dials through your preferred VoIP or power dialer (Mojo, CallTools, RingCentral—whatever you’re fluent in), overcome objections on the spot, and document every outcome in my CRM or a shared spreadsheet. At the end of each day I’ll look for a concise report that shows total dials, live con...

    $8 / hr Average bid
    $8 / hr Snittbud
    13 bud

    I already have a Twilio account and Flex instance running; what I need now is a fully-working IVR dedicated to customer support. The core requirement is straightforward: when callers reach the main number, the IVR should greet them, gather their intent with a single-language menu, and route each call to the correct Flex queue or agent based on that selection. Here is what I expect: • A Twilio Studio or Function-based call flow that handles the greeting, DTMF capture, and call routing logic. • Proper queue creation and mapping inside Flex so agents immediately see the call context. • Clear hand-off to voicemail only if the queue is unavailable, keeping regular hours in mind. • A short set of deployment notes outlining where to adjust prompts or add future menu ite...

    $137 Average bid
    $137 Snittbud
    25 bud

    I run XPERTUS, a leadership development and training firm with a near-perfect close rate once prospects reach a virtual meeting. To keep that pipeline full I’m looking for a remote assistant who can confidently introduce our programs over Emails and WhatsApp, overcome basic sales objections, and lock qualified decision-makers onto my calendar. You’ll be dialing and messaging from an existing prospect list, supplementing it with your own mass-mail outreach where useful. A clear, neutral accent is essential because most conversations happen by voice note or live call. Tools you should already be comfortable with include a modern CRM to log activity and move leads through stages, an email marketing platform for batch sends and follow-ups, and a VoIP service for quick outbound ca...

    $18 Average bid
    $18 Snittbud
    12 bud

    I generate a steady stream of residential real-estate leads—people who have shown interest in buying or selling—but right now I only have their basic contact details. I need a confident cold caller who can pick up the phone, engage each prospect, qualify motivation, and move them to the next step: booking a listing appointment or a buyer consultation with me. You will handle the full call cycle: craft or refine a script that works for residential sellers and buyers, make the dials through your preferred VoIP or power dialer (Mojo, CallTools, RingCentral—whatever you’re fluent in), overcome objections on the spot, and document every outcome in my CRM or a shared spreadsheet. At the end of each day I’ll look for a concise report that shows total dials, live con...

    $25 / hr Average bid
    $25 / hr Snittbud
    16 bud

    Dirijo una agencia especializada en marketing digital para el sector salud y necesito un closer con verdadera experiencia en llamadas en frío. Mi meta es clara: vender nuestros servicios de marketing digital a clínicas dentales pequeñas. El trabajo comienza justo después de entregarles la base de contactos; tú tomas el timón para: • Realizar las llamadas en frío. • Detectar necesidades y presentar nuestra propuesta de valor. • Gestionar objeciones, negociar y cerrar la venta por teléfono. • Registrar cada avance en mi CRM y dejar notas precisas para seguimiento. Busco a alguien que ya conozca las particularidades del mundo odontológico, se sienta cómodo usando herramientas de VoIP y CRM, ...

    $450 Average bid
    $450 Snittbud
    11 bud
    React Native VoIP Server Build
    13 timmar left
    Verifierad

    I need a solid back-end that lets a future React Native client place and receive calls with the reliability of a carrier-grade PBX. The server must handle: • Incoming and outgoing calls • Call forwarding and call transfer • Voicemail storage/retrieval • A flexible auto-attendant (IVR) My preference is to stay in the React Native ecosystem for the client side, but I’m open to your guidance on the most appropriate SIP/WebRTC stack, media server (Asterisk, FreeSWITCH, Kamailio, etc.), and signalling approach. Please outline the architecture you propose, the main tech you’d employ, and an estimated timeline for delivering a first working build that can: 1. Register soft-phones via SIP or a comparable protocol 2. Complete internal and external cal...

    $152 Average bid
    $152 Snittbud
    23 bud
    Twilio-Zoho Call Integration Setup
    11 timmar left
    Verifierad

    I need our Zoho environment linked with Twilio so that any incoming call to our existing toll-free number shows our current caller ID and is immediately forwarded to a single destination number. Outbound calls placed from Zoho should present that same toll-free ID as well. Scope of work • Configure Twilio voice trunk to recognize and present our verified toll-free caller ID. • Build the Zoho integration (either via Zoho PhoneBridge, Functions, or REST hooks—whichever you think is cleaner) that triggers call events, logs them to the contact record, and lets users click-to-dial. • Set the voice routing rule so every incoming call is forwarded without condition to the number I will supply. No IVR or conditional logic needed. Acceptance criteria – A tes...

    $119 Average bid
    $119 Snittbud
    58 bud

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