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!

Müşterilerimiz, VoIP Developers freelancerlarımızı 22,245 değerlendirme içinden 5 üzerinden 4.8 ile derecelendirdi.
VoIP Developers İşe Alın

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!

Müşterilerimiz, VoIP Developers freelancerlarımızı 22,245 değerlendirme içinden 5 üzerinden 4.8 ile derecelendirdi.
VoIP Developers İşe Alın

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    Vicidial Linode Server Fix
    6 gün left
    Onaylı

    My Vicidial instance on a Linode VPS has suddenly dropped off-line. The hostname no longer resolves and I cannot reach the machine even by its IP, so I’m convinced this is a network-level problem rather than a recent configuration change—nothing has been touched for weeks. I need someone who is comfortable diving straight into a production Linode, checking DNS records, firewall rules, networking interfaces, and Vicidial/asterisk services to get everything visible on the internet again. Root SSH will be provided the moment you’re ready to start; the goal is minimal downtime and a clear explanation of what went wrong so it doesn’t repeat. Deliverable: • The server’s web and SIP services must be reachable externally at (and by direct IP). • Vicidi...

    €4 / hr Average bid
    €4 / hr Ortalama Teklif
    14 teklifler
    Solar Customer Care Support
    6 gün left
    Onaylı

    At Otovo, every call shapes a homeowner’s solar journey, and I need you to make those moments count. You will handle both inbound and outbound calls tied to our after-sales care subscription, acting as the first voice our customers hear before their case moves to Operations. Day to day you will: • Receive and place calls that answer questions, solve minor issues, or gather missing details. • Log each interaction in HubSpot—our chosen CRM—so the Operations team can pick up seamlessly. • Escalate technical or installation-related matters with clear, concise case notes, ensuring zero information loss during handover. Patience, empathy, and strong communication skills are essential; technical knowledge of solar systems helps but is not a deal-breaker because ...

    €15 / hr Average bid
    €15 / hr Ortalama Teklif
    30 teklifler

    VICIdial Cloud Installation & SIM Gateway Integration Project Job Title: VICIdial Cloud Installation & 32-SIM Gateway Integration Expert Needed Job Description: We are currently using a 32-SIM GSM Gateway setup with VICIdial software for inbound and outbound calling campaigns. We are looking for an experienced professional to migrate, configure, and optimize our system in a cloud environment. Scope of Work: • Install and configure VICIdial on a cloud server (AWS / DigitalOcean / GCP) • Integrate existing 32-SIM GSM Gateway with cloud setup • Configure SIP/VoIP connectivity • Set up inbound and outbound campaigns • Ensure call quality, routing, and system stability • Enable call recording and reporting • Fix data posting and call log sync issues &b...

    €9 Average bid
    €9 Ortalama Teklif
    1 teklifler

    We are looking for experienced freelancers for lead generation and marketing of AI/VoIP products. This is a commission-based role — you will earn only on successful deals. Commission: $250 – $2500 per deal (depends on product) Requirements: - Proven experience in lead generation or sales. - Ability to generate high-quality, convertible leads. - Must clearly explain your strategy and platforms when applying. Product details will be shared only with shortlisted candidates. Ideal for freelancers confident in generating and closing leads.

    €367 Average bid
    €367 Ortalama Teklif
    9 teklifler

    VICIdial Cloud Installation & 32-SIM Gateway Integration Expert Needed Job Description: We are currently using a 32-SIM GSM Gateway setup with VICIdial for inbound and outbound calling campaigns. We are looking for an experienced expert to migrate, configure, and optimize our system on a cloud-based environment. Scope of Work: Install and configure VICIdial on a cloud server (AWS / DigitalOcean / GCP) Integrate existing 32-SIM GSM Gateway with the cloud setup Configure SIP / VoIP connectivity Set up and optimize: Outbound campaigns Inbound call handling Ensure: Call quality Call routing System stability Enable: Call recording Reporting & analytics Fix data posting / call log sync issues (if any) Provide basic training and post-setup support Key Challenges to Address: Cloud data...

    €22 Average bid
    €22 Ortalama Teklif
    3 teklifler

    I’m ready to roll out several improvements to our live Avaya IVR and want someone who already knows their way around Avaya Experience Portal / Orchestration Designer and VoiceXML. The system is stable today, but the menu tree is dated and callers are not always routed to the right skill group. Here’s what I need done: • Add the new menu options that I’ll supply (scripts and prompts are finished and approved). • Fine-tune voice-recognition so callers can speak choices naturally; experience with Nuance or the built-in ASR tuning tools will be valuable. • Adjust the call-routing logic so selections flow to the correct queues without the current detours. You’ll receive: – Current IVR application files and design documents. – Ac...

    €18 / hr Average bid
    €18 / hr Ortalama Teklif
    30 teklifler

    Vicidial is already live on our cloud server; what I need now is an on-site engineer in Hyderabad who can bridge it to a 32-port Dinstar GSM gateway sitting in our office. Your task is strictly configuration and testing—no fresh installs. Scope of work • Register the Dinstar gateway as a SIP trunk inside Vicidial, keeping a close eye on call-quality parameters and full compatibility with the gateway. • Analyse the current router, decide which ports must be opened, then set up forwarding so traffic reaches the cloud server cleanly. No predefined template exists, so you will determine the rules and apply them. • Run end-to-end test calls, troubleshooting the single audio problem we’ve seen so far: distorted sound. I expect clear audio on both legs before sign-off....

    €16 Average bid
    €16 Ortalama Teklif
    3 teklifler

    I routinely shortlist applicants for different remote roles and need support with the first voice touch-point. Your main activity will be conducting structured job-interview calls in clear, confident English, then capturing concise notes so I can decide who moves forward. Alongside those interviews, you will keep the recruitment pipeline moving by: • scheduling the next-step meetings on my shared calendar, • making brief follow-up calls when documents or confirmations are missing, and • providing applicants with basic information about the role, deadlines, or platform procedures. Because many of the openings involve light tech work, it helps if you can recognise common programming terms, navigate major freelancing platforms, and use typical virtual-assistance tools for...

    €11 / hr Average bid
    €11 / hr Ortalama Teklif
    50 teklifler

    Necesito incorporar uno o varios operadores con experiencia intermedia para brindar soporte al cliente por teléfono y chat en línea durante el horario de oficina. Qué espero de tu servicio: • Responder llamadas entrantes y atender chats en vivo con trato cordial y soluciones claras. • Registrar cada interacción en nuestro sistema de tickets, dejando notas precisas sobre la consulta y el estado de seguimiento. • Escalar solo los casos que realmente lo requieran, manteniendo la primera línea de resolución en la mayor cantidad posible de contactos. Requisitos clave: • Experiencia previa en atención telefónica y chat (nivel intermedio: dominio de protocolos básicos, tono profesional y capacidad de ...

    €137 Average bid
    €137 Ortalama Teklif
    37 teklifler

    Necesito montar un servicio de atención al cliente que responda, ante todo, a consultas generales y mantenga la misma eficiencia en todos los puntos de contacto. Alcance del trabajo 1. Configurar Chatwoot como centro de chat en línea y conectar los perfiles de redes sociales para que los mensajes entren en una sola bandeja. 2. Integrar telefonía IP para las llamadas entrantes y salientes, asegurando grabación de llamadas y distribución automática. 3. Habilitar un buzón de correo electrónico dentro de la misma plataforma para que los tickets creados por email sigan el mismo flujo. 4. Conectar el sistema de facturación, nuestro software CRM y la herramienta de automatización de marketing; necesito que los datos fluyan sin...

    €6 / hr Average bid
    €6 / hr Ortalama Teklif
    36 teklifler

    A brand-new FortiSwitch 108F is on site at our Memphis retail store and now needs to be placed into the rack, powered up, and given a basic, first-run configuration. Scope of work • Rack the switch securely, connect to the existing power strip, and verify stable power. • Apply a simple initial configuration: set management IP, gateway, DNS, and one user-defined VLAN as I will specify on the day. No advanced scripting or complex policy work is required. • Confirm the switch is reachable from my remote workstation and that all indicator LEDs show expected status. • Provide a brief post-install report with the steps taken, screenshots or photos of the rack, and the final running-config. Site time 1PM Acceptance The job is considered done once the switch is m...

    €58 / hr Average bid
    Yerel
    €58 / hr Ortalama Teklif
    2 teklifler

    Project Title: AI Powered Auto Dialer for Bulk Greeting Calls 1. Background We are seeking a developer/team to design and implement an AI enabled auto dialer system capable of making approximately 20,000 outbound calls to deliver greeting messages. The solution should be scalable, user friendly, and compliant with Indian telecom regulations (TRAI/DoT). 2. Objectives • Automate bulk calling campaigns with minimal manual intervention. • Deliver pre recorded or text to speech greeting messages. • Provide a simple dashboard for campaign management, monitoring, and reporting. • Ensure scalability and reliability for large call volumes. 3. Scope of Work • System Setup: o Deploy open source dialer software (e.g., Asterisk, FreeSWITCH, VICIdial, GoAutoDial) or propose alte...

    €222 Average bid
    €222 Ortalama Teklif
    44 teklifler

    ENGLISH _______________________________ We are looking for a results-driven Appointment Setter to help us find and connect with potential clients for web development and software projects. Your main goal will be to identify leads, reach out via cold calling, LinkedIn, or email, and book qualified meetings with decision-makers such as founders, CTOs, and business owners. What you'll do: Prospect and identify potential clients who need web or software development services Reach out via cold calling, LinkedIn, and email in both English and Spanish Qualify leads and schedule appointments with our development team Track outreach activity and report results weekly Compensation: 30% commission per closed project — no cap on earnings. If you're a self-starter who loves sales and ...

    €113 Average bid
    €113 Ortalama Teklif
    50 teklifler

    ## 1. Project Scope The service provider will design, install, and configure a production-ready VoIP Call Center system using Asterisk on a Linux-based environment. The scope includes: * Server Environment: Installation and hardening of the latest stable Asterisk version on a cloud-based or local Linux server (Ubuntu/Debian). * Trunking & Connectivity: Integration of [X] number of SIP Trunks for external inbound and outbound calling. * Extension Management: Creation and configuration of [X] agent extensions supporting PJSIP/SIP protocols. * Call Flow Logic (Dialplan): * Development of a multi-level IVR (Auto-Attendant) menu. * Implementation of time-based routing (Business Hours vs. After Hours). * Queue Management (ACD): Setup of call queues with specific distribution strategies (...

    €3534 Average bid
    €3534 Ortalama Teklif
    42 teklifler

    Job Title Mobile Network Testing Support (Bangladesh – Robi Network) Job Description We are looking for a reliable freelancer based in Bangladesh to assist with mobile network quality and security testing on the Robi network. This role involves supporting the setup and maintenance of Android devices used for testing incoming SMS and voice OTP delivery performance. All testing is conducted for network quality analysis, service reliability, and security (anti-fraud) evaluation purposes. Scope of Work - Assist with handling up to 3–5 Android devices (devices can be provided or discussed) - Install our testing application (simple guided setup) - Insert SIM cards and ensure they are properly detected Keep devices: - Connected to Wi-Fi - Connected to power - Online and operati...

    €572 Average bid
    €572 Ortalama Teklif
    25 teklifler

    I need 15 reliable Android users to put my new utility call-dialer through its paces. For the next 14 days you’ll spend each day making and receiving real-world calls, exploring every screen, and pushing the features that matter to vendors who rely on leads. Key areas I want you to observe include: • Call quality and connectivity under normal and weak network conditions • Overall ease of use and navigation—how quickly you can complete common actions • The lead-conversion flow: from dialing to capturing the lead in the system • Auto-SMS replies, insight reporting, payments, sign-in, and any other dialer tools you uncover Deliverables 1. A short daily log summarizing what you did, issues found, and ideas for improvement 2. Immediate reporting o...

    €57 Average bid
    €57 Ortalama Teklif
    22 teklifler

    I am looking for a 3CX Professional licence partner and need a certified partner who can both supply the key and stay available for the long term. First, I want your help choosing the correct user-count edition, issuing the licence, and making sure activation goes through smoothly in my current SIP-trunk environment. Once the system is live I expect to lean on you whenever technical troubleshooting is required and to keep the platform patched and secure with regular updates and maintenance. Please outline your current 3CX partner status, typical turnaround for issuing new Professional licences, and how you normally handle remote support requests. If you already provide monitoring or update plans, mention those as well so I can see how they would fit my needs.

    €99 Average bid
    €99 Ortalama Teklif
    3 teklifler

    A FusionPBX (FreeSWITCH) installation and custom call flow configuration will be performed on a cloud server (Debian-based). The technical requirements of the project are as follows: 1. Server and Panel Installation: Installation of an up-to-date and stable FusionPBX on a Debian operating system. Configure firewall and Fail2Ban settings. 2. SIP Trunk and Incoming Call Management: Definition of SIP Trunk information (e.g., Telnyx / Verimor) provided by me. Creation of an enterprise welcome menu (IVR). Directing callers to the relevant extensions via the voice menu. 3. Dynamic Mobile Phone Routing (Critical Point): Incoming calls to extensions will be routed directly to their mobile phones. Important: The mobile numbers to which extensions are routed will not be fixed. Each extensio...

    €92 Average bid
    €92 Ortalama Teklif
    76 teklifler

    Χρειάζομαι έναν/μια έμπιστο/η γραμματέα για part-time συνεργασία, αποκλειστικά εξ αποστάσεως. Η κύρια αρμοδιότητα είναι η τηλεφωνική υποστήριξη πελατών στα Ελληνικά: θ&al...

    €154 Average bid
    €154 Ortalama Teklif
    5 teklifler

    Title: AI Automation Guide / Operator (Vapi, Twilio, n8n, Go High Level) – Long Term Description: I’m looking for someone to help guide me through the technical side of my AI-based business. I already have someone building my voice agents. What I need now is someone who understands the tools and can help me set things up properly, explain what’s going on, and make sure everything runs smoothly. I’m not looking for a big agency or someone charging very high rates. I’m looking for someone who has learned by experimenting, building, and testing things themselves, and is now looking for consistent work and a long-term collaboration. What I need help with: * Setting up accounts properly (Vapi, Twilio, n8n, Go High Level) * Making sure everything is secure (AP...

    €74 Average bid
    €74 Ortalama Teklif
    56 teklifler

    I run a Gurgaon-based real estate firm and need a couple of sharp, English-speaking telecallers who can work from home. Your single focus will be cold calls—no customer-service chatter, no follow-ups for now. Every dial should push us closer to one thing: generating qualified leads for our sales team. You’ll be calling two segments that respond well to our inventory: first-time homebuyers and property investors. I’ll share daily lists, a brief property cheat-sheet, and access to our lightweight CRM so you can log notes in real time. If you already have experience with tools like CallHippo, Aircall, or similar VoIP platforms, that’s a plus but not mandatory. Deliverables I expect at the end of each shift: • A CRM log with call outcome for every number attemp...

    €252 Average bid
    €252 Ortalama Teklif
    4 teklifler

    Top Responsibilities: Lender Liaison: Communicate and follow up proactively with banks, realtors, sellers, and title companies to move files toward closing. Document Management: Collect, review, and organize complex financial hardship packages (financials, tax returns, bank statements, etc.) to ensure completeness and accuracy. Package Submission: Prepare and submit complete loss mitigation packages via lender portals and respond promptly to any missing document requests. Foreclosure Tracking: Monitor foreclosure timelines and coordinate critical steps such as BPOs/appraisals, payoff statements, and postponement requests. Case Logging: Maintain detailed digital notes and follow-up history for every file. Requirements: Must-Have: Proven experience in foreclosure processing, loss mitigation...

    €9 / hr Average bid
    €9 / hr Ortalama Teklif
    2 teklifler

    Top Responsibilities: Lender Liaison: Communicate and follow up proactively with banks, realtors, sellers, and title companies to move files toward closing. Document Management: Collect, review, and organize complex financial hardship packages (financials, tax returns, bank statements, etc.) to ensure completeness and accuracy. Package Submission: Prepare and submit complete loss mitigation packages via lender portals and respond promptly to any missing document requests. Foreclosure Tracking: Monitor foreclosure timelines and coordinate critical steps such as BPOs/appraisals, payoff statements, and postponement requests. Case Logging: Maintain detailed digital notes and follow-up history for every file. Requirements: Must-Have: Proven experience in foreclosure processing, loss mitigation...

    €9 / hr Average bid
    €9 / hr Ortalama Teklif
    4 teklifler

    I need a production-ready SMSC gateway that supports full two-way SMS communication. Incoming and outgoing traffic must flow through my existing phone system, so the solution has to plug into that infrastructure cleanly—SMPP, HTTP API, or any proven method you are comfortable with, as long as the end result is stable and easy for my team to operate. Because this ties directly into live telephony, speed matters: I would like to see an initial working build, integrated and testable, as soon as possible. Clear, step-by-step deployment notes and any source code are expected so we can maintain the service internally after hand-over. Deliverables • A fully functional SMSC gateway enabling send/receive messaging • Seamless integration with the current phone system (details p...

    €1094 Average bid
    €1094 Ortalama Teklif
    55 teklifler

    Project Overview: We are looking for a reliable freelancer based in Bangladesh to support us with Robi SIM card procurement and optionally assist with mobile network testing activities. This project can be structured in two ways depending on your availability: SIM Procurement Only (one-time task) SIM Procurement + Testing Support (short-term or ongoing engagement) Scope Option 1: SIM Procurement (Required) Procure Robi prepaid SIM cards (initial batch of at least 4, with potential for more) Ensure all SIM cards are: Legally purchased Properly registered in line with local regulations Activated and ready for standard mobile usage (SMS and voice) Share SIM details and confirm readiness Note: The SIM cards will be used strictly for network performance testing purposes for telecommunicatio...

    €158 Average bid
    €158 Ortalama Teklif
    6 teklifler

    Job Title Robi SIM Procurement & SMS Testing Support (Bangladesh) Project Overview We are looking for a reliable freelancer based in Bangladesh to support us with Robi SIM card procurement and optionally assist with short-term and ongoing SMS routing testing on the Robi network. This project has two possible scopes depending on your availability: SIM Procurement Only (one-time task) SIM Procurement + Testing Support (short-term or up to 1 month+ engagement) Scope Option 1: SIM Procurement (Required) Procure Robi SIM cards (minimum 4, potentially more) Ensure SIMs are: Properly registered and activated Able to receive SMS and voice Share SIM details and confirm readiness for testing Important: The SIM cards will be used only for Robi network testing of incoming traffic (OTP/SMS/v...

    €153 Average bid
    €153 Ortalama Teklif
    7 teklifler

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