VoIP Jobs

I need my Windows-based calling app wired up to 3CX and Twilio so both inbound and outbound calls flow without glitches. The work is a mix of fresh setup—provisioning the Twilio SIP trunk, routing numbers, configuring 3CX—and targeted troubleshooting on what’s already in place. A few settings have been touched, so you’ll likely spot and correct any mis-configured codecs, authentication details, or firewall rules. If this sounds straightforward for you, let’s schedule a quick session to outline next steps and timelines.

I’m ready to launch a 10-seat outbound call centre and need a VICIdial professional who can take the project from zero to live calls. Your mission is to install and fully configure the latest stable version of VICIdial, optimise the server environment, integrate reliable SIP trunks that allow CLI override, and verify everything with live-call tests. Server and hosting I do not yet have hardware in place, so I’ll rely on your guidance. My preference is to run the system on a VPS; please specify the exact CPU, RAM, storage and bandwidth you consider safe for 10 simultaneous agents. If you feel a dedicated machine would offer clear advantages, outline those too and I’ll weigh the trade-offs. Core tasks • Fresh installation of the latest stable VICIdial release &...

I need help setting up a Grandstream GXW device to connect to my server via a VPN Connection. Requirements: - Configure VPN on the Grandstream GXW or extra device if needed - Assist in setting up the VPN server - Ensure secure and stable VPN connection Ideal Skills and Experience: - Experience with Grandstream devices - Strong knowledge of VPN - Network configuration expertise - Previous setup experience required

We are building a real-time voice agent using Elevenlab's WebSocket API and need an expert in Freeswitch to help us bridge our current call flow to the Elevenlab's voice agent. Requirements:
 - Proven experience with Freeswitch core and module development
 - Experience with `mod_audio_fork` and `mod_audio_stream`
 - Deep understanding of SIP/RTP/media flows What you will do:
 - Connect our existing Freeswitch server with Elevenlab's WebSocket-based voice agent using `mod_audio_fork` and `mod_audio_stream`, we need both to be configured. 
 Enable seamless, real-time, bi-directional audio between the caller and the voice agent
. Stream audio to Elevenlab in real-time and handle incoming transcription/command messages. Maintain high availability and low latency across mu...

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 sig...

We are building a structured AI-powered call routing system in South Africa. The system must: • Integrate with existing PBX systems via call forwarding or SIP • Use a South African virtual number • Route inbound calls through an AI voice receptionist • Identify query type • Provide structured information • Escalate security-related matters • Send SMS notifications when required • Log call analytics This is NOT a chatbot project. This is a voice AI + VoIP routing infrastructure project. Technical Requirements: Developer must have experience with: • SIP / VoIP integration • PBX systems (3CX, Yeastar, Telkom, etc.) • Twilio or similar telephony APIs • AI voice agent implementation • Call forwarding configuration • SMS...

I want to deploy a voice-based AI agent that can dial prospects, speak naturally, and end every successful conversation by blocking time directly into my Google Calendar. While its core duty is simply to secure the appointment, it must also recognise and overcome the typical objections people raise on a first cold call so that only genuinely uninterested leads exit the funnel. You are free to recommend the stack—Dialogflow, Twilio Voice, ElevenLabs, Whisper, GPT or any blend that keeps latency low and speech quality high. What matters is that the agent sounds human, follows a short persuasive script, branches intelligently when an objection surfaces, then lands on the scheduling flow and writes the confirmed slot to Google Calendar through the API. When the job is complete I will b...

Project Title: Customer Service Representative (Remote) – Telemedicine (Phone + Email Support) Project Description: We are hiring a remote Customer Service Representative for a fast-growing telemedicine company. We need a candidate who is a confident, clear English speaker with minimal accent and has proven customer service experience handling both phone calls and emails. This role is essential to ensuring patients/customers receive timely, empathetic, and accurate support. Key Responsibilities: Respond to customer inquiries via email promptly and professionally. Handle inbound and outbound calls, resolving issues related to orders, account management, and general questions. Communicate fluently in English with a clear and empathetic tone (Spanish is a plus). Escalate complex case...

We have an Android mobile dialer application that is set as the default phone app. The app supports: GSM/SIM-based calling SIP/VoIP calling We need to implement a feature that allows conference calling between: One GSM call One SIP call Requirement When a GSM call is active and a SIP call is active, the user should be able to merge them into a single conference call so that all participants can talk together. Technical Expectations Experience with Android Telecom framework Experience working with: Connection Service In Call Service SIP stack (PJSIP or Android SIP API) Handling audio routing between GSM and SIP Managing call states and audio focus Proper call merge / conference implementation Clean and stable solution Important Notes The app is already functioning for individual GSM and ...

I need real-time, screen-share guidance on Google Meet to get a brand-new Twilio Elastic SIP Trunk talking cleanly with my existing 3CX system so we can place and receive phone calls. My Twilio account is a blank slate, and the main hurdle is the integration itself—both inbound and outbound routing must work by the end of the session. Here is the flow I have in mind: we start inside Twilio, build the trunk from scratch, add the authentication details, assign a DID, and verify the voice routing. From there we’ll jump into the 3CX management console, create the corresponding SIP trunk, map the numbers, set caller ID rules, and tweak codecs or transport settings if required. Once registration is solid we will run live test calls in both directions to confirm audio quality and sig...

Project Description: We are looking to develop a VoIP calling application with direct phone-to-phone/mobile calling and the ability to use a custom caller ID. The project will include both an Android user app and a web-based admin portal for managing users and call data. Key Features: Admin Portal: User Management – Add, remove, and manage users. Custom Caller ID – Assign or change custom caller IDs for users. User Details Management – Manage name, email, user ID, password visibility, and assigned caller ID. Call Logs – Save and display calling history with IP addresses, calling number, time, and duration. Admin Control – Only admin can add new users and modify user details. User App (Android): Login – Users log in with email ID and password. D...

We are hiring a capable team to deliver the first production module of an AI system that performs automated cold calls, speaks in Singlish, qualifies prospects, and books meetings. Only apply if you have previous production deployments in voice AI calling. Scope of Phase 1 Lead Handling Google Sheets ingestion status updates Outbound AI Conversation automated dialing dynamic script execution interruption & objection handling Booking calendar availability conflict prevention event creation invite sending Callback Automation schedule future redials maintain conversation continuity Expectations You must provide: clear system architecture role division in your team delivery timeline scalability approach reliability & monitoring strategy Required Expertise Your team should coll...

I need an open-source ICTFax on my linux server so I can both send and receive faxes from the network. Every incoming fax must be archived automatically as a PDF, and all administration—including queue monitoring, user setup, and log review—has to be handled through a clean, browser-based interface. Any stack that meets those points is fine Like ICTFax as long as it runs on a recent Debian/Ubuntu or CentOS release with no licensing fees. I will supply SSH access to a fresh VM and either a Class 1/2 USB modem or a T.38 SIP trunk you can register against. Fax server installation & system hardening SIP trunk / FoIP gateway integration Incoming & outgoing fax routing and testing Web-based fax send, receive & management Automatic PDF conversion for all faxes F...

I need an IPRN switch brought online fast, fully wired for billing integration and ready to carry live traffic. The core signalling will run over SIP, so every module you build or configure must interoperate cleanly with SIP endpoints and the upstream carrier trunks I already have in place. Billing is the priority: once a call lands on the switch the CDRs must flow straight into our existing rating platform without manual touches. I am open to whether you plug in a ready-made mediation layer or write custom logic—what matters is that usage records appear in real time and reconcile correctly at the end of each day. You will get SSH access to a fresh cloud instance plus the credential set for my billing server. I expect you to: • Deploy or compile the soft-switch software, ...

We are building a voice AI assistant that can automatically talk to customers over phone calls and handle real business conversations in multiple Indian languages (Hindi, English, and other regional languages). The system should: • Receive incoming customer calls • Answer queries (fees, services, timings, status, due payments, support requests) • Make automated outbound calls (appointment confirmations, reminders, lead follow-ups, collections) • Transfer the call to a human agent when required This is NOT a keypad IVR. The assistant must understand natural spoken language from callers and respond with a natural-sounding voice. Technical Scope: • SIP/VoIP integration using Asterisk or FreeSWITCH • Real-time Speech-to-Text • Text-to-Speech voice response...

1. Objetivo del Proyecto Desarrollar un sistema automatizado que: 1. Identifique qué palabra clave de Google Ads genera una llamada. 2. Analice automáticamente la conversación (grabación/transcripción desde Zadarma). 3. Determine si la llamada fue un lead real con intención comercial. 4. Envíe una conversión offline a Google Ads únicamente si la llamada es positiva. 5. Permita medir rentabilidad real por keyword. Negocio: Taller especializado en BMW, Audi, Mercedes y Land Rover en Madrid. Alto volumen de llamadas desde campañas de búsqueda. ⸻ 2. Sistema actual • VoIP: Zadarma (grabación y transcripción activadas) • Publicidad: Google Ads • Web: WordPress • Servidor di...

Looking for Sound Engineer – Live Voice Transmission Optimization (Hardware + Embedded) I am currently looking for an experienced Sound Engineer / Audio Systems Engineer who is capable of working on live voice transmission from a tablet to standalone hardware such as Raspberry Pi / ESP32-based systems. * The product is already built and functional * The requirement is mainly for optimization, testing, and technical feedback * Focus areas include: audio transmission stability reduction quality optimization –software integration feedback 5.Real-world performance testing This is a great opportunity if you have experience with: * Embedded audio systems * Live streaming audio pipelines * IoT audio hardware * Signal processing for voice transmission If you have worked on similar ...

We need an AI receptionist that can handle incoming calls in a polite, natural, and professional manner. When someone calls, it should greet the caller, ask who they would like to speak with, and then intelligently route or transfer the call to the appropriate person or phone number. In addition, the AI should be able to detect if the caller is not comfortable speaking English and smoothly switch to another language (or offer a language choice) to ensure clear and comfortable communication.

US-Based freelancers ONLY preferred (USA location required for time zone alignment with Northern California – PST preferred). No exceptions – please confirm your location in your proposal. All communication via this platform only—no phone calls, emails, or external contact needed until hired. Budget: $250 FIXED (premium for fast, high-quality delivery from a proven expert – ideally completed in 1–3 days, today/tomorrow if possible). Full, complete one-time GoHighLevel setup project (expected 2–5 hours total) for a local home services business: 1. Port an existing Verizon number (ten-digit local CA number – details provided securely after hire) to Twilio for full inbound/outbound SMS and voice calls. Handle all porting paperwork/requirements (acc...

I run a small healthcare service that now handles all patient inquiries remotely, and I need a reliable phone-based customer service specialist to become the first point of contact for our callers. You will take incoming calls, answer routine questions about appointments, billing, and basic medical service information, document each interaction in our cloud CRM, and route more complex issues to my clinical team when necessary. Clear, empathetic communication and strict attention to patient confidentiality (HIPAA standards) are essential. Core tasks • Pick up calls during the agreed shift (Monday–Friday, US Eastern hours) • Verify patient identity, listen actively, and provide accurate information • Log call details and dispositions in our web-based ticketin...

I run a small healthcare service that now handles all patient inquiries remotely, and I need a reliable phone-based customer service specialist to become the first point of contact for our callers. You will take incoming calls, answer routine questions about appointments, billing, and basic medical service information, document each interaction in our cloud CRM, and route more complex issues to my clinical team when necessary. Clear, empathetic communication and strict attention to patient confidentiality (HIPAA standards) are essential. Core tasks • Pick up calls during the agreed shift (Monday–Friday, US Eastern hours) • Verify patient identity, listen actively, and provide accurate information • Log call details and dispositions in our web-based ticketin...

We are looking for an experienced React Native developer to help build and integrate a VoIP calling SDK into an existing mobile application. This is not a basic app development task. We need someone who has real experience with VoIP / WebRTC / SIP / SDK-level work and can deliver quickly. ### Project Scope - Integrate and extend a React Native VoIP SDK - WebRTC calling using - Inbound & outbound call handling - Push notification based incoming calls - Background call handling - App-based configuration dialing logic - SDK-style packaging + documentation support Our team will handle: - OpenSIPS / SBC (Call logic) - SIP infrastructure - APIs You will handle: - React Native SDK layer - Mobile VoIP calling integration - Native module bridging if required - Call UI handling - Stabili...

I need help with a technical issue on Linphone, integrated with FusionPBX. I’m on a custom-built version of Linphone. Current Problem: - Calls do not come through at all when the app is in the background Requirements: - Expertise in VoIP, FusionPBX, and Linphone, especially with custom builds - Proven experience with similar issues Ideal Skills: - Strong background in mobile VoIP applications - Familiarity with both iOS and Android systems - Ability to troubleshoot and resolve background operation issues Please only bid if you have relevant experience.

I need a Japanese national DID or any other VOIP number that can reliably forward calls to my chosen destination. The line will serve both personal and business purposes, so stability, clear audio and the ability to register the caller ID on common soft-phone or SIP devices is essential. Please supply, activate and demonstrate the number working via simple call-forwarding within the shortest possible time; my preference is ASAP. If you already have an inventory of Japanese DIDs, even better—let me know the formats available and any documentation requirements. Acceptance is straightforward: once I can receive and place test calls through the number without drops or quality issues, the milestone is cleared.