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!

Conform celor 24,193 recenzii, clienții îi evaluează pe VoIP Developers cu 4.8 din 5 stele.
Angajează 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!

Conform celor 24,193 recenzii, clienții îi evaluează pe VoIP Developers cu 4.8 din 5 stele.
Angajează VoIP Developers

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    This role centres on sending pre-written emails to my customers from the comfort of your own home. I supply short, clear video tutorials that walk you through the entire emailing workflow, so you can be productive from day one. Although the core of the work is email handling, you may occasionally transfer an inbound call to me if a customer rings the support line, so a calm phone manner is a plus. You will succeed fastest if you already possess: • Customer service experience • Email handling know-how • Basic computer operations confidence Please have a laptop or smartphone with a reliable internet connection and be comfortable reading and writing simple English. Consistency is important; I rely on timely responses and accurate record-keeping. I review performan...

    $11 Average bid
    $11 Oferta medie
    29 oferte

    I need a confident, clear-spoken caller to reach out to health-insurance agents and spark their interest in our pay-per-call lead generation service. Your task is simple: introduce the concept—live, inbound calls and secure a calendar slot for my closer to take the conversation further. There’s no hard sell or complicated pitch; you’ll be making warm introductions, answering a few top-level questions, and booking the appointment. If you already use a dialer, CRM, or VOIP platform, great—just export the basic call notes so I can track progress. I’m flexible on the actual calendar tool as long as the meeting lands smoothly in my team’s schedule. Deliverables I’m counting on: • Daily call log with contact outcome • Confirmed appointm...

    $6 / hr Average bid
    $6 / hr Oferta medie
    8 oferte

    I am looking for an experienced developer who has strong knowledge of MyOperator APIs and webhook integrations. I am building my own CRM system called Garuda CRM, and I need help integrating MyOperator with it so that call data and actions can be connected directly to my CRM. Key Requirements: Experience working with MyOperator API Experience implementing webhooks Ability to integrate call logs, call events, and call tracking into a custom CRM Configure real-time data flow from MyOperator to Garuda CRM Ensure reliable syncing of incoming and outgoing call data Knowledge of backend integrations (REST APIs, JSON, etc.) Scope of Work: Integrate MyOperator with my CRM Set up webhook endpoints to capture call events Sync call details such as: Caller number Agent details Call stat...

    $8 / hr Average bid
    $8 / hr Oferta medie
    20 oferte
    Build Voice AI Agent for VoIP system
    4 zile left
    Cont confirmat

    I have a custom-built VoIP system and now I need a conversational Voice AI agent fully integrated into it. The agent must: • answer common user FAQs with a natural, friendly tone • transfer callers to the appropriate live extension when requests fall outside its scope • record every call and automatically generate accurate, time-stamped transcripts for later review I’ll supply SIP credentials, call-flow diagrams and a small set of example dialogs. You will wire the AI logic into the VoIP stack, expose a simple dashboard or API so I can update FAQs on the fly, and ensure recordings and transcripts are stored in the format my compliance team already uses (WAV + JSON). Completion is accepted when live test calls on my staging server prove that: 1. callers get...

    $1987 Average bid
    $1987 Oferta medie
    41 oferte

    ONLY BUILD IF YOU HAVE STRONG EXPERIENCE IN THESE AREAS SIP, NAT Traversal, Asterisk/FS, React and strong backend servers scaling. I’m building a browser-based VoIP platform dedicated to business communication and I need an experienced React developer to take it from architecture to live deployment. The entire feature list—covering everything from secure voice and video calling to messaging and call-related utilities—is spelled out in the requirements document I’ve attached, so you’ll have clear, granular guidance from day one. SIP, NAT Traversal, Asterisk/FS Tech expectations You’ll craft a responsive single-page app in React (TypeScript preferred) that connects to a SIP/WebRTC back-end. I’m open to your preferred server stack (Node/Express,...

    $4075 Average bid
    $4075 Oferta medie
    23 oferte

    Admin interface: -Creating carriers: Carrier name, Carrier IPs:Ports (To be allowed where calls to from), Personal Notes. -Adding numbers with CSV File: Range;country;Number;Carrier Payout;Carrier Pay Term;Client Payout;Notes (remarks) -Numbers should be all routed to a local IVR (or a group of IVRs, which will be played randomly) if not allocated to any client. -Numbers page show all details: Range, number, carrier, carrier payout, carrier pay term*, client payout**, to which client it's allocated if it is, and Notes -Search options: search per client allocated numbers, per carrier, per range, per country, per rate (more than or less than or =), per number, etc. -Option to download CSV file numbers of the searched result, or for all if search is reset for all -Select numbers (...

    $118 Average bid
    $118 Oferta medie
    17 oferte
    Resume services
    3 zile left
    Cont confirmat

    I already have a Linux server online and reachable; what I need now is a clean installation and full configuration of Asterisk, FreePBX, and A2Billing so I can run a reliable business phone system. Your scope covers: • Installing the latest stable releases of Asterisk, FreePBX, and A2Billing on my existing server • Bringing the stack to a “ready-to-use” state—SIP extensions, VoIP trunks, IVR, call recording, voicemail, and billing profiles must all function out of the box • Hardening the server (firewall rules, Fail2Ban, strong passwords/keys, SSL where applicable) • Running test calls to confirm inbound and outbound traffic, rate decks, CDR logging, and balance deductions in A2Billing • Handing over a concise post-deployment guide so I ...

    $171 Average bid
    $171 Oferta medie
    86 oferte

    I want my new AWS account configured to host a USA-based SIP trunk through Amazon Chime. The job includes creating or hardening the AWS environment, provisioning an Amazon Chime Voice Connector, assigning U.S. numbers, and enabling both inbound and outbound calling. The trunk has to register cleanly with our existing on-premise PBX and soft-phone apps, so please allow for SIP signaling tweaks, codec selection, and basic security (TLS, SRTP, firewall rules). Once the link is live, I’ll need brief documentation of the key settings so we can maintain it internally. Deliverables • AWS account prepared with least-privilege IAM roles • Amazon Chime Voice Connector fully configured and licensed for U.S. PSTN access • SIP trunk integrated and test calls completed (in...

    $18 Average bid
    $18 Oferta medie
    9 oferte
    VoIP-CRM Integration Advisory Session
    2 zile left
    Cont confirmat

    I run a custom CRM called Ilumino and need an impartial, one-off consultation (about 1–3 hours) to decide which cloud VoIP platform to pair with it. I’m already looking closely at JustCall and Aircall, and my top priority is the strength and flexibility of their API capabilities. The chosen solution must comfortably handle: • Call recording • SMS integration • Analytics and reporting What I expect from our session: you’ll walk me through each platform’s API/webhook structure, outline the real-world pros and cons for a custom CRM like mine, flag any hidden costs or licensing quirks, and help me draft the right technical questions for my Ilumino developers. If you’ve previously connected VoIP tools to bespoke CRMs, especially where detailed...

    $717 Average bid
    $717 Oferta medie
    23 oferte

    I’m looking to have IP cloning / masking configured on my VoIP servers so we can distribute traffic evenly and keep call quality high. Load balancing is the sole objective here—this isn’t about anonymity or region-hopping, just making sure each incoming SIP session finds the least-loaded endpoint without exposing multiple public addresses. The environment is already up and running; what I need is the networking magic that presents one or more virtual IPs while the real servers sit safely behind them. If you normally work with tools such as iptables, nftables, HAProxy, IPVS, BGP anycast, or cloud firewalls, that’s perfect—use whatever combination you trust so long as it’s stable and keeps latency low. Because the phone queues are busy, I need this done ...

    $10 Average bid
    $10 Oferta medie
    5 oferte

    I need to walk through, configure, and fully test an after-hours rule on my RingCentral call queue. Outside of business hours every call should go directly to voicemail, unless the caller flags it as urgent—in that case it must be forwarded instantly to the team lead’s phone. I want this built live with me so I understand each step. Once the escalation path is working, we’ll spend the remainder of the hour fine-tuning other features I use every day, specifically the IVR menu settings and the newer AI receptionist options. A short screen-share session is perfect; one focused hour should cover everything. Deliverables (completed during the call) • Functional call-queue rule that sends after-hours calls to voicemail • Verified urgent-call forwarding to the team...

    $125 Average bid
    $125 Oferta medie
    4 oferte

    Hi Vicidial is installed and working. Calls are being made too. Issue is i need to make calls to different campaigns. But it calls to one campaign. Here is work flow I have AI bot that works with vicidial via node bridge. When i make calls from vicidial, it connects to bridge and bridge then finally connects to AI bot. I have created 2 campaigns medicare and final expense. It must dial both campaigns and i must receive calls on both numbers. Currently i can receive call on medicare campaign only. I need to fix this issue. So this job is only for them who can resolve this issue.

    $17 Average bid
    $17 Oferta medie
    16 oferte
    SIP Intercom Station Software
    1 zi left
    Cont confirmat

    Client needs a VoIP Intercom Station operating in Standards Based SIP. Developer must have experience working with SOC like NanoPI and OrangePI. Developer must meet the following list of requirements so as not to waste our time. Embedded Linux Development Strong experience developing software for embedded Linux systems Experience with custom Linux distributions (Debian/Ubuntu) Kernel configuration, device drivers, and hardware interface support Bootloader and system startup (U-Boot or similar) Experience working with flash-based storage systems Linux system optimization for embedded hardware VoIP / SIP / Networking Experience implementing or maintaining SIP-based communications systems Knowledge of RTP / RTCP media streaming Familiarity with VoIP codecs such as G.711, G.729, Speex Un...

    $1350 Average bid
    $1350 Oferta medie
    21 oferte

    **Project Title:** Zabbix Monitoring Configuration for IP Cameras and Network Devices **Project Overview:** We are looking for an experienced Zabbix engineer to configure and optimize a Zabbix monitoring system for an existing surveillance network consisting of more than 100 IP cameras and related network devices. The goal is to ensure reliable monitoring of device availability, network health, and key service ports. **Current Setup:** * Zabbix Server already installed and running * Approximately 100+ IP cameras already added as hosts * Basic ICMP ping template currently applied * Hosts are currently showing "Unknown" or incomplete monitoring status * System running on Linux server (Ubuntu) **Scope of Work:** 1. **Zabbix Configuration Review** * Review current Zabbix ins...

    $107 Average bid
    $107 Oferta medie
    9 oferte

    I need an IVR built and configured so callers reach the right help fast. Its sole purpose is customer support, and it must offer three options in every relevant branch: an automated response for common questions, the ability to transfer to a live agent, and—when queues are long—a call-back request feature. You’ll design the call flow, record or synthesize the prompts, connect it to our existing SIP/VoIP trunk, and make sure the routing to our support team works flawlessly. I’m open on the exact number of menu levels; clarity and speed for the caller are what matter most, so feel free to recommend the simplest structure that still covers our FAQs and escalation paths. Final hand-off should include: • Diagram of the call flow with all customer touch-points &b...

    $81 Average bid
    $81 Oferta medie
    8 oferte

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