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!

Nga 25,403 vlerësimet, klientët vlerësojnë VoIP Developers 4.8 nga 5 yje.
Punësoni 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!

Nga 25,403 vlerësimet, klientët vlerësojnë VoIP Developers 4.8 nga 5 yje.
Punësoni VoIP Developers

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    18 u gjetën punë

    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...

    €16 Average bid
    €16 Oferta mesatare
    9 ofertat
    VoIP-CRM Integration Advisory Session
    6 ditë left
    Të verifikuara

    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...

    €645 Average bid
    €645 Oferta mesatare
    21 ofertat

    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 ...

    €8 Average bid
    €8 Oferta mesatare
    4 ofertat

    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...

    €108 Average bid
    €108 Oferta mesatare
    4 ofertat
    Optimize Outbound ViciDial Campaigns
    5 ditë left
    Të verifikuara

    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.

    €15 Average bid
    €15 Oferta mesatare
    16 ofertat
    SIP Intercom Station Software
    5 ditë left
    Të verifikuara

    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...

    €1168 Average bid
    €1168 Oferta mesatare
    18 ofertat
    Zabbix Surveillance Network Optimization
    5 ditë left
    Të verifikuara

    **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...

    €93 Average bid
    €93 Oferta mesatare
    6 ofertat

    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...

    €70 Average bid
    €70 Oferta mesatare
    8 ofertat

    Mam na własnym VPS zainstalowaną najnowszą wersję GoAutoDial 4. Potrzebuję specjalisty, który poprawnie skonfiguruje połączenie z moim dostawcą SIP trunk – Zadarma – tak, aby system bezbłędnie realizował zarówno połączenia wychodzące, jak i odbierał przychodzące. Zakres prac: • dodać i zweryfikować trunk Zadarma, • utworzyć odpowiednie dial-plany i reguły routingu, • przeprowadzić testowe połączenia w celu potwierdzenia jakości oraz stabilności, • wprowadzić ewentualne korekty konfiguracji serwera Asterisk wchodzącego w skład GoAutoDial. Środowisko obejmuje jeden VPS, więc konfiguracja dotyczy pojedynczego serwera. Po zakończeniu proszę o krótką instrukcję krok-po-kroku, abym mógł samodzielnie zarządzać podstawowymi zmiana...

    €31 Average bid
    €31 Oferta mesatare
    6 ofertat

    I’m looking to partner with a reliable call-centre operation that can dedicate 1 – 5 agents exclusively to inbound customer support over the phone. All interactions will be in English, so clear diction and a neutral accent are essential. The agents will be the first point of contact for my customers, answering questions, resolving basic issues, and routing complex cases to my in-house team when needed. Average volume is modest right now, but I need a team that can scale quickly if call traffic grows. Core expectations • Live phone coverage during the agreed shift window • Courteous, solution-focused conversations that follow my brand guidelines • Real-time ticket or CRM updates so I always know the status of each call • Daily call logs and a conc...

    €246 Average bid
    €246 Oferta mesatare
    10 ofertat
    Omnichannel Dialer & CRM Integration
    2 ditë left
    Të verifikuara

    We are looking for an experienced developer or development team to build an Omni-Channel Dialer Platform that allows customers to communicate with us through multiple channels from a unified system. The system should allow customers to connect through their preferred communication channels such as: Voice Calls (Inbound & Outbound) Video Calls Email SMS Social Media Messaging Platforms: Facebook Messenger Twitter / X Instagram WhatsApp The platform must integrate with our Voice Bot Platform through API or Webhooks so that calls and conversations can be routed to our bot when required. Core Features Required: Omni-Channel Communication Unified dashboard for all channels Real-time conversation management Incoming and outgoing communication support CRM Integration Built-in Customer CRM ...

    €443 Average bid
    €443 Oferta mesatare
    17 ofertat
    ISSABEL VOIP
    2 ditë left
    Të verifikuara

    Project Title: Full Issabel 5 PBX Deployment: Installation, Trunks & Extensions Project Overview I am seeking a VoIP specialist to perform a complete installation of Issabel 5 on an AlmaLinux 8 cloud instance. Beyond the base installation, the freelancer will configure the initial telephony architecture, including SIP trunks for external connectivity and internal extensions for users. Detailed Scope of Work 1. Server Installation & Hardening Perform a clean installation of Issabel 5 on AlmaLinux 8 using the official net-install script. Configure Fail2ban and firewall rules to block unauthorized SIP and SSH attempts. Set secure passwords for the Linux root, MariaDB, and Issabel web admin. 2. SIP Trunk Configuration Connect the PBX to my chosen VoIP provider using a SIP trunk....

    €36 Average bid
    €36 Oferta mesatare
    13 ofertat

    I don't have FusionPBX installed on any server yet. You will install and setup fusionpbx on a server I will provide credentials access into. I want to be able to present a specific caller ID on every outbound call placed from my softphone. The softphone I will be using is Linphone, so everything you build must be fully tested from that app before we wrap up. What I need you to do • Configure the relevant SIP profile(s) and outbound route so that the number I supply appears consistently, regardless of the device extension that initiates the call. • Make any dial-plan or gateway adjustments required for a typical commercial SIP trunk. I have not fixed on one provider yet, so keep the setup provider-agnostic and document the few fields I will have to tweak once I decide. ...

    €34 Average bid
    €34 Oferta mesatare
    9 ofertat

    Virtual Assistant / Phone Support for Wellness Clinic (4 hrs/day MST) Project Description I am the owner of a wellness clinic and mobile health services company. I am looking for a reliable virtual assistant from Latin America to help with phone support, appointment scheduling, and social media interaction. This is a long-term part-time position for someone who can work US Mountain Time mornings. Work Schedule Monday – Friday 8:00 AM – 12:00 PM Mountain Standard Time (MST – Colorado USA) Approximately 20 hours per week Main Responsibilities Phone Support Answer incoming calls from clients Respond professionally and friendly Schedule appointments Answer basic service questions Appointment Scheduling Book appointments in our booking software Confirm appointments Send re...

    €5 / hr Average bid
    €5 / hr Oferta mesatare
    46 ofertat
    Outbound Voice AI Scheduler
    20 orё left
    Të verifikuara

    I need an outbound voice AI that can pick up the phone, speak naturally with customers, and lock in service appointments without human involvement. The bot should dial leads from a list, confirm the customer’s need for our service, offer available slots pulled from an online calendar, secure the booking, and then push the confirmed appointment back to our CRM while sending the customer a confirmation SMS or email. Core flow • Call initiation through a voice gateway such as Twilio • Speech recognition and NLU (Dialogflow CX, Amazon Lex, Rasa, or similar) to understand the caller’s intent, handle clarifying questions, and gracefully manage “I didn’t catch that” moments. • Text-to-speech that sounds human; Google WaveNet, Amazon Polly or Micro...

    €449 Average bid
    €449 Oferta mesatare
    190 ofertat

    I need a streamlined website whose sole function is to host and manage a voice-based AI call-center. The site will act as the control panel and public-facing entry point for customers who dial in, while giving me an admin area to configure and monitor activity. Core requirements • Automated responses: callers must hear natural-sounding, AI-generated answers that pull from a knowledge base I can update myself. • Live call routing: when the AI decides human help is needed, it should hand the caller off to a live agent instantly and log the transfer. • Voice channel only: chat or email may be added later, but right now the system must excel at telephone interactions. Technical expectations – Cloud telephony integration (Twilio, Plivo, or similar) for SIP/VoIP ha...

    €1029 Average bid
    €1029 Oferta mesatare
    74 ofertat

    A Direct Sales / Sales Coordinator. We've been established 17 years. We are in the early stages of rebuilding, expanding the company. After contracting due to the pandemic. We have been running stsbly. We are now looking to build a team. I've been running most aspects of the company over the last couple of years, but due to expansion, the workload is growing. I'm an expert in direct sales, sales trainer, team builder, motivator, that's pretty much what I do. And marketing as well. I've developed some unique concepts, which I mentor self employed ambitious people. I train mindset and work ethic and develop communication skills and general business skills. I'm looking for somebody to join the team, to work remotely. bit of a split role, so somebody ...

    €500 Average bid
    €500 Oferta mesatare
    9 ofertat
    Google Voice USA Calls Setup
    Ka përfunduar left

    I need a fully-functional Google Voice account for 10 Users supported, registered from India but tied to a U.S. phone number, so I can place and receive personal calls to and from the States. The account itself does not yet exist and I have not picked a number, so part of the job is guiding me through—or handling—the selection of an available U.S. number that feels natural to me. Because Google Voice is officially unsupported here, you’ll have to take care of the usual hurdles (VPN, verification SMS to a real U.S. mobile, billing profile if required) and then hand over a clean login that I can secure with my own 2-step authentication. I plan to use the service interchangeably on both my smartphone and my laptop, so please configure and test calling on the Google Voice mo...

    €2 / hr Average bid
    €2 / hr Oferta mesatare
    6 ofertat

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