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  4. (Current) Freeswitch Specialists
  • US$65 hourly

    • 5.0/5
    • (70 jobs)
    I have a good skills in the administration of FreeSwitch and Kazoo servers This includes: - multi tenant installations, - creation of high availability clusters - protection against fraud - deploying servers in systems virtualization Amazon, Kubernetes, KVM, docker and VMWare
    vsuc_fltilesrefresh_TrophyIcon Freeswitch
    VoIP Administration
    Kamailio
    FreeSWITCH
    Amazon EC2
    Session Initiation Protocol
    Iptables
    VoIP Software
    VMware ESX Server
    TCP/IP
    Linux
    CentOS
  • US$45 hourly

    • 4.9/5
    • (287 jobs)
    Hello everyone, I am Martin. I will do my best satisfy my clients to the fullest. I have worked as professional software developer for about 20 years and have good experience in: -Asterisk, FreePBX -FreeSwitch, FusionPBX -Kamailio, OpenSIPs -WebRTC -PHP, MySQL -c/c++ -JavaScript, Node.js, HTML5/CSS -Linux System Administration, Networking -git, SVN I'm always working in a friendly environment so that we can make long term business relationship. I feel honored to have a continuously growing list of happy clients with positive feedback on my work.
    vsuc_fltilesrefresh_TrophyIcon Freeswitch
    Kamailio
    Node.js
    Vue.js
    JavaScript
    PHP
    MySQL Programming
    Asterisk
    FreePBX
    FreeSWITCH
    TypeScript
    Session Initiation Protocol
  • US$70 hourly

    • 5.0/5
    • (172 jobs)
    I am consistent "Top Rated Plus" VoIP Developer on Upwork with numerous 5 star reviews including excessively positive feedback. 13+ years of experience in Custom VoIP Software Development. I have provided a wide range of IT solutions, including VoIP Development, Websites & Mobile Apps development for international businesses and start-up companies as well as for large enterprises. 🏆 Following are my area of experiences: ✓ VoIP / SIP / RTP ✓ OpenSIPs / Kamailio / OpenSER ✓ FreeSWITCH, FusionPBX, ASTPP, Lua Scripts ✓ Asterisk, FreePBX, A2billing ✓ RTPengine / MediaProxy / RTPproxy ✓ Twilio ✓ Linux & OpenSource Consulting ✓ MariaDB, MySQL, PostgreSQL (Database design & complex SQL query expert) ✓ PHP, Yii/Yii2, Apache, Nginx ✓ Android 🏆 I provide the following solutions: ✓ High scalable Least Cost Routing(LCR) with Fail-Over ✓ Session Border Controller(SBC) ✓ Click to call ✓ Class4 & Class5 Soft Switches ✓ SIP Proxy Server, SIP Load Balance & Fail-Over ✓ SIP Messaging Server, SIP Redirect Server ✓ IVR Application ✓ Fax over IP (FoIP), T38 Supported FAX Server, FAX to Email ✓ Shoutcast Server ✓ WebRTC SIP client ✓ PHP RESTfull API, Web Services for Mobile Application ✓ Web Applications ✓ Mobile Applications. My core competency lies in complete end-to-end IT solutions for VoIP, Web, and Mobile technologies. 👤 Reviews & feedback given by clients for successfully completion of largest projects ⭐⭐⭐⭐⭐ "Malay is an excellent VoIP expert and was able to do any task we could throw at him. Will be using his services again shortly as our go-to VoIP expert." ⭐⭐⭐⭐⭐ "Excellent at meeting deadlines. Outstanding at changing work hours to conform to my requirements. First-rate productivity levels. Extremely good communication and ability to explain and brainstorm in a group environment. Admirable at working with other random developers I brought into the project throughout the years. Malay and his team at Prayantech were able to tackle any task I through at them from Asterisks, FreeSwitch, Python PHP HTML JS Debian RHEL IP Tables working inside of multiple different cloud hosting environments his understanding of VPN and firewall security are excellent. I can’t say enough good things about this group I am certain we will be working together as a team for many years to come." ⭐⭐⭐⭐⭐ "Malay and his team were great to work with. Once we got in a flow, we were able to bring something to life I could not have done without him and his team. He was extremely aware of timelines and making time for our project during our "open hours" and working around the time change. Thank you Malay! Keep up the great work and I look forward to working with you soon!" ⭐⭐⭐⭐⭐ "It was a pleasure working with Malay. Very professional and to the point. they don't waste time and they want to finish your project as much as you want to."
    vsuc_fltilesrefresh_TrophyIcon Freeswitch
    MySQL
    OpenSIPS
    FreeSWITCH
    Yii
    PHP
    Kamailio
    Yii2
    API
    VoIP Software
    Asterisk
    MariaDB
    Session Initiation Protocol
    Linux System Administration
    Database Administration
    VoIP Administration
    VoIP
  • US$35 hourly

    • 4.8/5
    • (40 jobs)
    1) Free PBX Expert (Installation, Development, Configuration, Technical Support). 2) Fusion PBX Expert (Installation, Development, Configuration, Technical Support) 3) Asterisk Expert (Installation, Development, Configuration, Technical Support). 4) Vicidial Expert (Installation, Development, Configuration, Technical Support). 5) Go Auto Dial Expert (Installation, Development, Configuration, Technical Support). 6) Fop2 Expert (Installation, Development, Configuration, Technical Support). 7) VOIP Expert. 8) IVRS (Design, Development, Configuration, Technical Support). 9) Linux, Mysql Database Expert. 10) Lua Expert. 11) PHP, Mysql, Perl expertise. 12) Rabbit MQ, Redis, Ha proxy Expertise. 13) Freeswitch (Development, Support, Installation) 14) AI / Voice Bot Expert using unimrcp. Projects Handel: 1) IPPBX. 2) Contact Center Solution. 3) SoftSwitch. 4) Autodialer/ Voice Broad Casting System/ Call Back System/Calling Card System. 5) IVRS/Voice Mail /Conference Solution. 6) Voice & SMS Broadcasting System. 7) VOIP Billing Solution. 8) PRI / ISDN/ GSM gateway Integration expert. 10) Solution Design Expert. 11) Architecture Expert. 12) Cloud / On-premises PBX/ contact center / Soft switch Deployment expert.
    vsuc_fltilesrefresh_TrophyIcon Freeswitch
    Linux System Administration
    MySQL
    VICIDIAL
    PHP
    OpenSIPS
    Session Initiation Protocol
    FreePBX
    VoIP Administration
    FreeSWITCH
    Asterisk
  • US$36 hourly

    • 5.0/5
    • (4 jobs)
    Implement / maintain STFC operator environment, with protocols and communication at Anatel. Maintenance of telecommunication services / equipment, remotely and in person, such as: IP Telephony (Asterisk / Freepbx / ISSABEL / BICOM / SBC/ Kammalio / FusionPBX / Freeswitch / Opensips / SBC / Yeti Systems/ Border Communications), Interconnection with operators - CLASS IV (Dialogic), Software management - CLASS V (Sip Pulse), E1 Gateways (Khomp, Aligera). Also carrying out pre- and post-sales actions in the company's new contracts in the corporate and government scope, it describes the implementation of call centers, new interconnection and transit topologies with operators, omnichannel channels and integrations to pre-existing systems.
    vsuc_fltilesrefresh_TrophyIcon Freeswitch
    Kamailio
    FreeSWITCH
    Citrix
    Asterisk
    Linux System Administration
    VoIP
    Network Administration
    NGINX
    Bash
    DHCP
  • US$60 hourly

    • 4.9/5
    • (43 jobs)
    Having 12 years’ experience in Asterisk/OpenSips/Kamailio based application development. With over 6 plus years’ experience in WebRTC development along with 4 years’ experience in Windows development. Below are highlights of the projects and applications worked on: 1. Worked on all the Asterisk configuration changes, which even includes PJSIP. 2. Asterisk Event module (Which handles the request from NodeJS server and handles the events like play greeting, play MOH, Take input field, record greeting, making call, etc. it covers all the features and functionalities of asterisk) 3. Projects which deal with SIP WebRTC Client both Audio & Video. 4. JSON VOIP Client (Audio & Video). This was developed to overcome the loading of heavy SIP stack in browser or mobile. as a result we develop a simple JSON framework to make calls, with a server in the middle that converts to SIP and pushes calls to the asterisk server. 5. Applications for Video conferencing on WebRTC, which supports Peer to Peer in browsers, Android & iOS systems. 6. Applications for Video on WebRTC with SFU (Janus GateWay) in browser, Android & iOS systems. 7. Windows and Mac-based Video Conference applications. In short, we developed an application that is similar to Zoom Meetings. 8. Technologies used for applications like OpenSips/Kamailio only for Proxy, Registrar, and Load Balancing. 9. Worked on C# wpf WebRTC video conferencing service. 10. Worked on C# wpf PJSIP softphone application along with 11. Worked on electron.js with PJSIP softphone application. 12. Microsoft Teams SBC (Call To Teams)
    vsuc_fltilesrefresh_TrophyIcon Freeswitch
    Tableau
    Session Initiation Protocol
    FreeSWITCH
    Asterisk
    Desktop Application
    React Native
    C++
    Android
    C
    Microsoft Windows
    Swift
    React
    Flutter
    WebRTC
    C#
  • US$35 hourly

    • 4.4/5
    • (111 jobs)
    Over 14+ Yrs experience in VoIP (Asterisk, Freeswitch) & WebRTC Softwares (Jitsi, Janus, Kurento, Wowza) Development, Media Streaming, Server Architectures, Web & Smartphones Applications WebRTC Application Development - Audio & Video Conferencing - WebRTC, Jitsi, Twillio, OpenTok, Kurento - Screen Sharing, Recording - Online Tutoring and E Learning - Telemedicine and Health Applications - Video Broadcasting and Live Streaming - SFU, STUN & Multiple Server architectures VoIP Service: - Asterisk/Freeswitch/OpenSIP/Kamilio setup & Configurations - PBX System & Software Development - Unified Communication Software - CallCenter Softwares - DID Management - Auto/Predictive Dialer - Mobile or Sip or VoIP Dialers - Real Time billing software - Distributed Server Architecture - Load Balancing and failover setup - Server Administration, Maintenance & 24*7 Support IOS/Android Apps Development: - Location Based Applications - GPS Based Application Development - Social Networking - SMS, IM Chat Implementation - Travelling, Navigation, and Weather forecasting Apps - VoIP/SIP Dialer - Restaurant, Marketplace, Ecommerce Applications Website and Web Application Development - Static/dynamic Site design & Development - PHP, Laravel, Yii2 - Ecommerce Sites - Content Management System - Full Stack Development (Node.js, React, Angular, ReactNative, Vue.js) Technology, Platforms and languages expertise: Frontend Web: Angular, React.js, Vue.js, PHP Backend: Java, PHP, Laravel, Node.js, Python Mobile: Swift, native, react native, Kotlin, Electron Others: Websocket, Github, Gitlab, Bitbucket, Jira, auth0, Firebase, Ejabbered Cloud Solution: AWS, Google cloud, Azure, Digital Ocean, Hetzner CI/CD: Gitlab CI, Bamboo CI, Bitbucket CI, Jenkins WebRTC: Native, Kurento, Tokbox, Jitsi, janus, OpenVidu VoIP: Freeswitch, Asterisk, Twillio, Kamilio, FusionPBX, FreePBX, SIPJs Web Server: Nginx, Apache 
    vsuc_fltilesrefresh_TrophyIcon Freeswitch
    Video Stream
    Streaming Platform
    Asterisk
    FreeSWITCH
    Kamailio
    VoIP Software
    Web Development
    React
    Android App Development
    iOS Development
    Flutter
    Android
    React Native
    PHP
    Node.js
    WebRTC
  • US$70 hourly

    • 4.4/5
    • (6 jobs)
    NetworkLab, is experts in Linux based Open Source Projects includes firewalls UTM and many others. Fortinet Mikrotik Cisco PFsense EndianUTM Libreswan Strongswan Asterisk (FreePBX, MirtaPBX) Freeswitch (FusionPBX) XMPP (Ejabberd, Prosody) Opensips Kamailio Theforeman Katello Nagios Check-mk Linux VPN infrastructure ( Libreswan, Strongswan) Ovirt Libvirt Archipel We are proven source of professionals in technology industry. Our full-service help build the tools you need for a successful product.
    vsuc_fltilesrefresh_TrophyIcon Freeswitch
    FreeSWITCH
    OpenSIPS
    VoIP Software
    Red Hat Enterprise Linux
    Linux System Administration
    Network Administration
    System Administration
    VPN
    VoIP
    Network Engineering
    Network Design
  • US$50 hourly

    • 4.9/5
    • (60 jobs)
    Telecom Software and Network Engineer more than 11th years in companies - communication providers. Main skills is design and deploying a complete infrastructure of voip provider, using OpenSource telephony technologies such as Kazoo 2600hz, freeswitch, OpenSIPS \ Kamailio, asterisk, etc. Mostly I'm dealing with emerging startups or with accomplished voip companies which want to improve\reorganize their infrastructure; create something new or fix some issue on their network. So it is main area but sure I can help with other projects that correspond to my list of skills.
    vsuc_fltilesrefresh_TrophyIcon Freeswitch
    VoIP Software
    VoIP PBX
    VoIP Administration
    Erlang
    Apache CouchDB
    RabbitMQ
    Lua
    PostgreSQL
    MySQL
    OpenSIPS
    Kamailio
    FreeSWITCH
    VoIP
  • US$30 hourly

    • 3.6/5
    • (26 jobs)
    I am working In VoIP , Android and iOS since last 10+ year. I have provided wide range of Technical solutions in VoIP, WebRTC, Website and Mobile Application development areas to startups , mid level and enterprise companies. I have expertise with VoIP mobile development, Android/iOS application development, Flutter Development, ReactNative Development and Web application developments with specialty in developing Asterisk, FreeSWITCH, OpenSIPs, Kamailio, OpenSER, VoIP/SIP, ASTPP, WebRTS and Mobile VoIP based solutions. I have worked on 25+ Linphone, PJSip and WebRTC Based Mobile VoIP Diallers with 100% Client satisfaction. I can also provide customized Class-4 and Class-5 Softswitch for your VoIP business. Please refer below services I can provide. - Linphone Mobile VoIP Dialler development - PJSIP Mobile VoIP Dialler development - Asterisk Server Installation, development , customization and maintenance. - FreeSwitch Server Installation, development , customization and maintenance. - Kamailio and OpenSips Server Installation, development , customization and maintenance. - Android Application development - iOS Application development - Web Application Development - RectJS and ReactNative Web and Mobile Application development. - Testing and bug fixing in existing applications. - Consulting for ongoing projects. - Can provide consulting for projects related to Android, iOS, ReactJS, Asterisk , FreeSwitch , Opensips, Kamailio, ASTPP, RTPengine, MediaProxy, RTPproxy, FreePBX and A2Billing. - Expert in developing Flutter WebRTC Applications. - Expert in developing ReactNative WebRTC Applications. ✅ Mobile Softphone development - Linphone, PJSIP, WebRTC, Any Proprietor SIP SDK integration, Agora Integration, LiveKit Integration, Custom WebRTC Development ✅ VoIP - Freeswitch, Asterisk, FreePBX, FusionPBX, Kamailio, Opensips, ASTPP ✅ React - ReactJS, NextJS, ReactNative, Mobex, Axios, MaterialUI, React-Bootstrap, TailWindCss ✅ NodeJS - NodeJS, NestJS, Middleware, Typescript, Javascript, AWS Deployment, CI/CD Deployment ✅ Mobile Application - Flutter, ReactNative, Android Kotlin, Android, Swift, Objective-C, SwiftUI ✅ HTML, JS, CSS, Bootstrap, Vanila Script, Jquery You can message to discuss your requirements in detail.
    vsuc_fltilesrefresh_TrophyIcon Freeswitch
    FreeSWITCH
    VoIP Software
    Asterisk
    XMPP
    Kamailio
    VoIP
    React Native
    iOS
    Android App Development
    iOS Development
    Mobile App Development
    React
    WebRTC
    Node.js
    Swift
  • US$30 hourly

    • 4.9/5
    • (21 jobs)
    Are you in need of top-tier IT services to empower your business or project? Look no further! As a highly skilled IT service provider on Upwork, I offer a wide array of technical expertise and solutions to meet your unique needs. With a strong background in the IT industry, I specialize in delivering a range of services that span the entire spectrum of Information Technology. Whether you're a business aiming to strengthen your digital presence, an entrepreneur launching a tech startup, or an individual seeking technical assistance, my expertise is here to drive your success. My services encompass: Software Development: From custom software solutions to mobile applications, I can create tailored software to meet your specific requirements, helping you stay ahead in a competitive digital landscape. Web Design and Development: I design and develop visually appealing, user-friendly websites that not only captivate your audience but also function seamlessly. IT Consulting: Leverage my expertise to make informed decisions about your IT infrastructure, from choosing the right technologies to optimizing your existing systems for efficiency. Network Management: Optimize your network for high performance and reliability, ensuring your data flows smoothly and securely. With a commitment to quality, innovation, and client satisfaction, I am dedicated to delivering results that exceed your expectations. Whether you require a one-time project or ongoing IT support, I'm here to provide the technical expertise you need to thrive in today's digital world. Let's discuss how I can assist you in reaching your IT-related goals and achieving digital excellence. Contact me on Upwork today, and together, we'll unlock the full potential of your digital endeavors!
    vsuc_fltilesrefresh_TrophyIcon Freeswitch
    FreePBX
    OpenSIPS
    VICIDIAL
    VoIP
    Asterisk
    Kamailio
    Lua
    VoIP Software
    Web Development
    FreeSWITCH
    Node.js
    React
    WebRTC
    Mobile App Development
    PHP
  • US$68 hourly

    • 5.0/5
    • (37 jobs)
    Our company, Innovations Applied LLC, has a wealth of experience creating and writing commercial web applications for b2b and b2c, supply chain, and streaming media. We are also Jitsi, 8x8, Zoom, Twilio, and other video conferencing platform specialists, having produced many customized applications! We are the best source if you are migrating from Twilio to Zoom or Jitsi. We are proficient in Linux admin & Networking and have built full stack server environments including database clusters, application servers, VoIP and SIP integrations, and cloud computing environments. Skills: Laravel, React, ReactNative, Java, SQL, Agile practices, Mobile development, Swift, Objective-C, HTML, CSS, node.js, JavaScript, Linux, xAPI, Git, RESTful API, Jira, JSON, Ajax, Bootstrap, jQuery, hibernate, c3p0, C++, Python, Tomcat, Apache, Nginx, video.js, jwplayer, eclipse, Mautic Marketing Automation, HumHub Social Collaboration, OwnCloud Storage, LHC Help Chat, MySQL,SIP, VoIP, FreeSWITCH, FusionPBX, Asterisk VoIP, Jitsi, Zoom SDK, Zoom Markeplace, Taiga, Wordpress, Canvas LMS, all kinds of streaming media, video production, video editing, UI/UX design and discovery, graphic design, SEO, and Lead generation.
    vsuc_fltilesrefresh_TrophyIcon Freeswitch
    Asterisk
    Agile Project Management
    WebRTC
    VoIP
    FreeSWITCH
    Mobile App Development
    FreePBX
    Mautic
    Video Stream
    Zoom Video Conferencing
    PHP
    WordPress
  • US$75 hourly

    • 4.9/5
    • (75 jobs)
    I have been working with PHP, Node js, MySQL, Mongo db and cloud telephony technologies like Asterisk, PBX, Freeswitch, Kamailio, Twilio and Plivo for the past few years and have great experience with them. I also have experience in Web and mobile Development, expert in Angular js and React js. I am ready to be hired and start working on your projects today.
    vsuc_fltilesrefresh_TrophyIcon Freeswitch
    Database Administration
    Kamailio
    Asterisk
    Twilio API
    VoIP
    JavaScript
    FreePBX
    Session Initiation Protocol
    TypeScript
    Node.js
    API
    VoIP Administration
    FreeSWITCH
    VoIP Software
    WebRTC
  • US$25 hourly

    • 4.7/5
    • (19 jobs)
    Hi Guest, First of all, thanks for visiting our profile. I am doing freelancing since 2010 and my expertise on complete VoIP solution including Freeswitch, Asterisk, PJSip, Opensips and Kamailio. I just recently launched a company which is not offering only VoIP solution but Zeus in Web Development(PHP, WordPress etc), Mobile App Development(Android & iOS). We are a team of members having extensive knowledge of all the services we are offering. We have successfully completed many projects delivered competent results with 100% accuracy with lifetime free support. To keep in mind 100% availability, Our dedicated manager is always online to make sure our client will face no more difficult to ask any query at any time. Let me mentioned the technologies which are our core strength listed below: Core PHP (All Frameworks) CMS(Wordpress, Joomla, Magento) VoIP(Opensource Billing software, Asterisk, Freeswitch, Kamailio, Opensips) Mobile App Development(Android, iOS specially Mobile Sip Dialer) Graphics Design Digital Marketing(SEO, SMM, SMO and PPC) Our price is very reasonable which allows us to work with us. Please share your requirement today only with us to check our capabilities to take your experience on the next level. To name a few tools & technologies that I have worked on: • High-level languages: C++, Objective C, Java, Python, PHP • IDEs: Xcode, Android Studio, Eclipse • Version Control & CI: SVN, Git, Perforce, Bitbucket, Jenkins • DBMS: MS SQL, MySQL, Oracle, PostgreSQL, MongoDB • Frameworks: Django, Zend, Magento, Django REST • Management tools: VersionOne, Jira, Trac, MS Project, MS Visio, XMind, Bugzilla, Balsamiq • Amazon Web Services (AWS) - EC2, S3, SQS, SNS, RDS, CloudTrail, Cloudfront
    vsuc_fltilesrefresh_TrophyIcon Freeswitch
    WebRTC
    iOS
    Android App Development
    AWS OpsWorks
    VoIP Software
    iOS Development
    FreePBX
    AMP Framework
    VoIP
    Session Initiation Protocol
    Asterisk
    VoIP Administration
    FreeSWITCH
    WordPress
    PHP
  • US$50 hourly

    • 4.8/5
    • (17 jobs)
    I'm a senior C, C++ developer with a passion for working on complex high-performance, and low­ latency systems for telecommunications like own Media Server to Media and Signaling servers like Freeswitch, Kamailio, OpenSIPS, JANUS, Kuranto, and JITSI. Furthermore, I started working on AI in the last six years and worked on ChatBots and VoiceBots. - Have a perfect experience on NLP/NLU open source and cloud platforms like Google dialog flow and Microsoft Luis. - Create custom Modules of Freesiwtch and JANUS for Google, Amazon, IBM Speech To Text, and Text to Speech for real-time transcribers. - Create Conversational IVR and Voice Translator with the help of Google And Amazon. - Real-Time text-to-speech and speech-to-text with NLP/NLU. - Real-Time translator using Google. - good experience in Server Side audio processing and sending audio to any channel. - Excellent experience on Kaldi, Rasa(NLP, NLU), and Python Wavenet library to train models. ✅ Technical Skills : - Development: C/C++, Python - Opensource: TensorFlow, Rasa, WebRTC, reSIProcate - Technology: SIP, Audio/Video, NLP, NLU, Kaldi, deep speech(Mozilla). - Tools (Master): Wireshark, SIPp - Having enough experience with VoIP library for iOS, Android & Windows in C, and C++. - Having experience in VoIP clients and server development. ✅ Develop for all the platforms you need. We cover: - Web - iOS and Android phones and tablets Develop web apps that work on mobile browsers, e.g., video chats, audio and video calling, and audio-video SDK. We help to plan your product and develop it so that users love it. Work with companies and startups to create new products and improve existing ones. ✅ Have the right processes you know in advance. Ours: 1 - Sales managers are 1st level, software analysts. They clarify your needs. You get 3 results: what users can do - user stories, recommended technologies, and estimate based on previous projects. 2 - Analysts clarify details and draw wireframes. They are mockups of all the pages with clickable buttons. So you can play with your app before it’s developed and make changes for cheap. Based on wireframes, we calculate project time and price estimation. 3 - Designers draw clickable graphic design prototypes. 4 - A team of developers, test engineers, and a project manager develops the product. 5 - The team installs it on your server and helps with app store submission. We do maintenance - part-time work on minor improvements after launch. Write to discuss and estimate your project. We give user stories and recommend technologies for free after a call. Without a call, we can’t do it well, unfortunately. All the right questions in writing would have taken days and still much missed. Answer the same workday. On weekends we rest, but if you have a chance - respond too. So please write to us now :)
    vsuc_fltilesrefresh_TrophyIcon Freeswitch
    React Native
    Session Initiation Protocol
    LLM Prompt Engineering
    LLM Prompt
    Bot Development
    VoIP
    WebRTC
    Kamailio
    OpenSIPS
    FreeSWITCH
    Video Stream
    Swift
    Dialogflow
    Artificial Intelligence
    Node.js
    Kotlin
    C++
  • US$55 hourly

    • 4.1/5
    • (52 jobs)
    I have 18+ years expereince in VoIP/SMS setups using IVRs, asterisk , Freeswitch, MS Teams and Opensips/Kamailio and VoIP | Freeswitch | Opensips | Contact Centers| Conversational AI| Amazon Connect|MS Teams
    vsuc_fltilesrefresh_TrophyIcon Freeswitch
    Session Initiation Protocol
    CentOS
    Linux
    FreeSWITCH
    Customer Relationship Management
    A2Billing
    Asterisk
    MySQL
    WebRTC
    Android
  • US$30 hourly

    • 4.0/5
    • (71 jobs)
    Greetings to All, I am working as Senior System Administrator and VoIP Engineer for the last 7 years.I am an expert in setting up Class 4-5 Grade voip Softswitch (e,g PortaOne,voipsoft-switch) and also an expert in setting hosted PBX both multi-tenant and stand-alone. My Core skill is to Administer different types of VoIP system based on asterisk ( e.g.Freepbx,Asterisknow,Issabel,Elastix),Freeswitch(e.g.Fusion-PBX),Grandstream UCM and Linux(Centos-7, Ubuntu).I am also a certified expert in Vmware data center virtualization on Vsphere 6.7 . and Red Hat Certified Engineer. In this recent years i have completed so many systems and virtualization-related projects such as I have deployed 2000+ user mail server using zimbra and postfix then implementing data center virtualization and VoIP Platform using Elastix and freepbx on various Financial organizations such as Bank, IT,etc. I have completed my Bachelor in Electronics and Telecommunication also did my Masters in Computer Science.Hence My skills are sufficient to solve any complex and long-term work smoothly and accurately. Building state-of-the-art, easy to use, user-friendly websites and System applications is truly a passion of mine. I actively seek out new technologies, and stay up-to-date on industry trends and advancements. Thanks
    vsuc_fltilesrefresh_TrophyIcon Freeswitch
    VoIP Software
    Elastix
    VoIP PBX
    3CX
    VoIP Administration
    Virtualization
    Network Engineering
    Asterisk
    FreePBX
    VMware Administration
    Zimbra Administration
    VICIDIAL
    Linux System Administration
    Microsoft Azure
    CentOS
  • US$25 hourly

    • 4.5/5
    • (191 jobs)
    Hello, Thanks for visiting my profile. This is Abid Ur Rehman, Certified Asterisk Developer DCAP, VoIP Consultant, VICIDial, FreePBX SCE, 3CX v18 and v20 Certified Advanced Engineer, Elastix ECE, GoAutoDial, The SIP School SSCA, PBXWare, A2Billing, FreeSWITCH, Twilio, FusionPBX, ASTPP, Network CCNA, Windows Servers MCSE, and Linux RHCE certified expert. I graduated with a BS in Telecommunication and an MSc in Telecommunication Networks. Having 10 years of VoIP/Linux/IT/Network planning, design, development, deployment, optimization, administration, and support experience in top-notch organizations such as Telappliant Ltd., Cybergen, SCB Global, Dialer360, and Primo Dialer. Skills and Certification: IP PBX: 3CX, Asterisk, FreePBX, Elastix, PBXware MT, FreeSWITCH, FusionPBX, Issabel, VoIPOffice Bitrix24 integration with FreePBX with or without the InforUnity module and with 3CX Pro/Enterprise. SMS Blast/Broadcast using SignalWire, VoIP.ms, Telnyx, Anveo, Bandwidth.com, Plivo, Skyetel, Twilio, VoxTelesys, BulkSolutions, Flowroute, Intelepeer, and BulkVS Telecom Billing: A2Billing, ASTPP, Yeti, VOS3000, and Magnus Billing. Dialer: VoiceBroadcast, VICIDial, GoAutoDial, VICIBox Multi-Server Clustering, Dialer360, Primo Dialer IP Phones: Aastra, AND phone, Algo, AudioCodes, Cisco, Cisco/Linksys, CloudTC, Cortelco, CyberData, Digium, H-Tek, Incom, Intelbras, Konftel, Mocet, Norphonic, Obihai, Panasonic, Patton, Phoenix Audio, Polycom, Snom, Thomson, Unidata, Uniden, VTech, Xorcom, Yealink, Yealink/Dreamwave IP PBX (hardware): Sangoma PBXact UC (and FreePBX phone system), Elastix IP PBX, Grandstream UCM, Yeaster S-series, Renegadepbx-1U-Appliance-with-FreePBX, Patton's SmartNode Branch eXchange (SNBX), SwitchVox, OpenVox. VoIP Providers: USA and Canada: Twilio, VoIP.ms, Switch2VOIP, SignalWire, Anveo, Alcazarnetwork, voxbeam, Telus, RingCentral, Call Centric, Voyant (Vitelity), Nextiva, bandwidth.com, Altotelecom, FlowRoute, QuestBlue, sip.us, DIDLogic, Nexmo, Plivo, siptrunk.com, Telnyx, IDTExpress, Zadarna SMS and BulkSMS: I can write code for you to send and receive SMS using any Asterisk and FreeSWITCH server and through popular providers like Telnyx, Twilio, Bandwidth.com, VoIP.ms, SignalWire. For bulk SMS, I can setup a code with the front-end for sending bulk SMS from a CSV . UK: Fuse 2, BT, VoIPTalk, DrayTEL, Telappliant, Gamma, sipgate, VoIPFone, VoiceFlex, Voicehost, Brightstar, Yellowgrid, Gradwell, T4com Ltd, Voxbeam, and Spitfire Linux Distro: CentOS, Redhat EL, Ubuntu, OpenSUSE, Debian, Back Track (Kali Linux) Windows machines: Windows Server 2012 and 2016, Windows Desktop 11, 10, 8, 7, and XP. Cloud Platforms: AWS EC2 and LightSail, GCP, Vultr, BlueHost, HostGear, Hetzner, and Digital Ocean Hypervisor: VMware ESXi, station and player, VirtualBox, ProxMox, oVirt, HyperV, I would be very happy to assist start-ups as well as SMEs in achieving their goals and business objectives. Thank you!!
    vsuc_fltilesrefresh_TrophyIcon Freeswitch
    Twilio
    VoIP Administration
    PBX
    Full-Stack Development
    VoIP PBX
    MySQL
    A2Billing
    3CX
    Kamailio
    Asterisk
    FreeSWITCH
    Linux System Administration
    FreePBX
    VICIDIAL
    VoIP
  • US$60 hourly

    • 4.6/5
    • (18 jobs)
    I have a 20 years of experience in IT and Telecommunications. I have heavy experience in open source software exploitation: - Unix-way (shell scripting, vim, sed, find and daemons...) - OSI model (TCP/IP, Ethernet and others) - telecom hadware - VoIP - many other... ...and development: - C - perl - Lua - JS - Golang - C++ - Python ...and more and more and more Some very special (but interesting) skills: - IMS core - GRPS Tunneling Protocol (GTP) - SIP, DIAMETER, etc. I'm not interesting in work with fixed price less than $200, sorry
    vsuc_fltilesrefresh_TrophyIcon Freeswitch
    VoIP Administration
    Session Initiation Protocol
    VoIP Software
    Kamailio
    FreeSWITCH
    Telecommunications Engineering
    Lua
    Linux System Administration
    VoIP
    Golang
    C
    Python
    C++
  • US$50 hourly

    • 5.0/5
    • (26 jobs)
    ⭐ TOP-RATED AWS Engineer with 100% JSS(Job Success Score) Are you searching for an experienced AWS Cloud Engineer who can help you set up, design, develop, integrate, and manage cloud-based solutions that not only meets but exceed your expectations? Look no further, your journey to cloud excellence starts here! I have worked on numerous projects, both small and enterprise-level, ranging from AWS infrastructure setup to comprehensive development and seamless integration. My development skills encompass the creation of highly scalable software applications using cutting-edge tools and technologies. One of my key strengths lies in creating robust CI/CD pipelines using Amazon CodePipeline, Bitbucket, and GitHub. These pipelines facilitate the deployment of applications on various AWS services, including Amazon Elastic Container Service (ECS), Elastic Kubernetes Service (EKS), Fargate, and EC2. MY CORE COMPETENCIES ---------------------------------- ✅ AWS SERVICES -- Amazon Connect, Lambda, Kinesis Stream, S3, Lex, DynamoDb, AWS PostgreSQL, Athena, API Gateway, IAM, EFS, ElastiCache, Elastic Beanstalk, Rekognition, AWS Environment. ✅ AWS DevOps -- ECS, EC2, Fargate, Load Balancer, CloudFormation, CodePipeline, CI/CD, Terraform, GitHub, Bitbucket, ✅ DEVELOPMENT -- Angular, Nodejs, Python, Java, Springboot, TypeScript, JavaScript, PHP, PrimeNG, Material, REST API, Front End, Back End, Databases. Thank you, I look forward to working with you. Your Success Is My Goal
    vsuc_fltilesrefresh_TrophyIcon Freeswitch
    Salesforce App Development
    MEAN Stack
    Amazon EC2
    AWS CloudFormation
    Angular
    VICIDIAL
    RESTful API
    Amazon DynamoDB
    AWS Lambda
    AWS Application
    Amazon Lex
    FreeSWITCH
    Amazon Web Services
    Node.js
    CI/CD
  • US$85 hourly

    • 4.5/5
    • (35 jobs)
    Hi, my name is Anis BEDHIAFI. I am a Senior VoIP Engineer. I am SSCA® certified My expertise covers most parts of VoIP networks including SIP devices and endpoints to IPBX systems, Call Centers, SBCs and more. I work on Cisco, Broadsoft and Oracle products. - Cisco/BraodSoft - Acme Packet/ Oracle Enterprise Session Border Controller - Oracle Session Delivery Manager SDM In the open source world, I work on: - Kamailio - OpenSIPS - Freeswitch - FusionPBX - ASTPP - Homer - Linux (Debian, Ubuntu & CentOS) - Webrtc My Skills: VoIP, SIP, FreeSWITCH, FusionPBX, ASTPP, Kamailio, Asterisk, FreePBX, PyFreeBilling, Elastix, WebRTC, SIP trunking, fail2ban, IPBX, Debian, Ubuntu, CentOS, Amazon AWS EC2, Windows Azure, Python, PHP, Lua, MySQL, PostgreSQL
    vsuc_fltilesrefresh_TrophyIcon Freeswitch
    VoIP PBX
    Linux
    PBX
    Debian
    VoIP Administration
    API
    Asterisk
    FreeSWITCH
    Session Initiation Protocol
    OpenSIPS
    Amazon EC2
    VoIP Software
    Kamailio
    Laravel
    WebRTC
  • US$40 hourly

    • 4.9/5
    • (142 jobs)
    With more than 15 years of experience, I specialize in creating new and improving existing applications using the latest technologies. I am an active contributor for multiple open source projects ranging from Operating systems, Applications, and security. I have been a leader in the IT industry in diversified applications, services, and technologies spread across the spectrum on varied platforms. During my experience, I have built many mobile apps and web solutions and successfully published them to the app store or play store and are highly ranked also. I’m a professional, detail-oriented, and result-driven developer with a proven track record of high-quality work and services dedicated to my client. I provide 24/7 services with my deep and rich knowledge and experience in software engineering, high-quality stacks, and strong leadership skills. I’m seeking to well-versed in structuring, developing, and implementing interactive mobile and web solutions, assisting clients in all troubleshooting endeavors. My prompt response, clear communication, fast delivery, and High-quality work always guarantee 100% client satisfaction and Job success. Key Skills:- * End-to-End encryption/XMPP/Erlang / Ejabberd / MongooseIM * WebRTC based secure call integration * Specialised in Node JS based web applications * Resourced on React JS based front end * Experienced in Objective-C/Swift for iOS app * Experienced in Java/Kotlin for Android App * Experienced in Dart for Cross-Platform(Flutter) * Bug fixing, optimize the app * Admin Panel & APIs Development * I have Ejabberd and MongooseIM core modules modified to make it more stable for Android clients (using Smack) and iOS clients (using XMPP Framework) My creations & methodology: - I provide secure applications for banking, social with End-to-End encryption or anything which need good encryption Chat applications like WhatsApp, Google pay, Line, Kakao, Telegram, etc. Taxi applications like Uber, Ola, etc E-commerce applications like Amazon, Flipkart, etc Good at responding to unstable network connections Custom modules created in Erlang for Ejabberd and MongooseIM server for defined XEPS can scale up to millions of users. Chat modules created on the website for social, online gaming, and many more I provide the next step taken for the apps, which looks complete I have the potential to deliver a solution from beginning to end. I have worked on Video conferencing/Audio-Video-calling/Chat and messaging/Live Streaming
    vsuc_fltilesrefresh_TrophyIcon Freeswitch
    Material Design
    XMPP
    Erlang
    Kotlin
    Flutter
    Mobile App Development
    iOS Development
    Firebase
    WebRTC
    Android
    Android App Development
  • US$45 hourly

    • 5.0/5
    • (11 jobs)
    I am professional freelancer having more than 10 years of experience in the VoIP industry. I am having wide knowledge of VoIP systems installation,configuration and troubleshooting. I am specialize in asterisk, vicidial, goautodial, freeswitch,elastix,Fusionpbx, Kazoo and freepbx based open sourece telephony platforms. I can configure the most advance solutions ranging from web integration of pbx to the enterprise level of VoIP systems deployment. I can also experienced in Linux based servers including opensuse,Centos and Red hat servers. I can install VPS and troubleshoot the day to day issues in the OpenVZ virtualization environment. My way of doing work is the best indication of customer satisfaction. I have done lot of projects in VoIP based systems.
    vsuc_fltilesrefresh_TrophyIcon Freeswitch
    OpenSIPS
    Linux System Administration
    Kamailio
    Asterisk
    Elastix
    FreeSWITCH
    VICIDIAL
    VoIP Administration
    WebRTC
    FreePBX
    Microsoft Teams
  • US$200 hourly

    • 5.0/5
    • (227 jobs)
    With over two decades of extensive experience in the world of programming, I've honed a knack for efficiency and innovation. I believe in optimizing time and delivering solutions that matter, constantly pushing the boundaries of what’s possible. From the age of 10, programming hasn't just been a job—it's been a calling. Whether you're looking for new project development or leveraging existing solutions, I’m your go-to expert. Experience: Twenty-two years of diverse commercial programming experience and 31+ years overall programming —from Linux administration and virtualization to end-user web development and complex billing systems for VoIP. Expert work with Asterisk since its inception and substantial experience with FreePBX, Trixbox, and a2billing. Proudly, I'm one of the contributing minds behind a2billing.org's trunk. My depth of expertise encompasses database administration and architecture, especially with MySQL and Postgres. Education: Master of Science in Computer Science (confirmed by WES) Technical Skills & Specializations: Languages: Python/Django, Javascript/jQuery, SQL, PHP, C/C++, Perl, Prolog/Lisp, and Forth. Platforms & Tools: Asterisk, Opensips, Kamailio, Callweaver (faxing). Noteworthy Contributions: Developed modules for FreePBX, Elastix, Trixbox, and a2billing. Philosophy: I stand for originality and meaningful impact. If a task doesn’t need to be done, I won’t push for it. Instead, I'll direct my energy towards novel and intriguing challenges, ensuring that you get the best of both worlds—innovation and efficiency.
    vsuc_fltilesrefresh_TrophyIcon Freeswitch
    Session Initiation Protocol
    C++
    PHP
    Kamailio
    Asterisk
    MySQL
    Amazon EC2
    Linux System Administration
    SQL
    Elastix
    A2Billing
    VoIP Administration
    OpenSIPS
    FreePBX
    Virtualization
    Python
  • US$40 hourly

    • 4.9/5
    • (22 jobs)
    - Core VoIP development (embedded platforms) - VoIP systems & Appliances customization (Asterisk & FreePBX / Elastix / ViciDial, Freeswitch & FusionPBX) - SIP routing, hands on experience - over 10k calls per day (or 50+ concurrent calls) - vast knowledge of backend programming languages (C++, Perl, Python, Bash, Lua, PHP, MySQL stored proc) - Linux Security & Intrusion detection
    vsuc_fltilesrefresh_TrophyIcon Freeswitch
    FreePBX
    Automatic Speech Recognition
    Kamailio
    Linux System Administration
    WebRTC
    Project Management
    Bash
    VoIP Administration
    Asterisk
    Perl
    PHP
    Python
    MySQL
  • US$30 hourly

    • 5.0/5
    • (4 jobs)
    I am Gita Maurya having a good exposure in IT industries with 5 years of experience. I have extensive knowledge in Asterisk, VoIP, Telephony, PHP development, WebRTC, AGI Scripting, WordPress, PHP (CI, Yii and Core PHP), AngularJs, NodeJs, System scripts.I am also having very good capability of execution of the project using Scrum Agile methodologies as well to execute the project in a better way with excellent quality and on time delivery. I can Work under pressure, Interested in learning new ways and tools of job. I made all the project with a proper plan, always oriented to success, persistent, organized, respectful, capable to work and solve problems alone or with a team, friendly and proactive. My priority is to deliver high quality software, offer world class support and meet all deadlines. I believe in a simplistic approach with a clean and effective code. My area of interest is also to develop a various kind of application which utilize my skills. I am seeking freelance work from creative and freethinking clients/companies with innovative ideas and approaches that contribute to my professional growth. I have developed various applications with Communication model such as WebRTC as well as Asterisk/VoIP applications based architecture along with PHP as an open source. I work on : • SMS, Voice, Fax Broadcasting solutions • Billing platforms and Business Automation • VOIP PBX and callcenters platforms based on asterisk and freeswitch, Ringcentral • Call center solution • Multi tenant Broadcasting system • WebRTC solutions • Asterisk development • Custom CRM web applications • Embedding Business logic • Developing custom workflows and schedulers • Integration of Third-Party apps through SOAP/ API / REST • Developing custom Reports / Dashboards • Salesforce Development • Portals development and integration
    vsuc_fltilesrefresh_TrophyIcon Freeswitch
    VoIP Software
    VoIP Administration
    FreeSWITCH
    Node.js
    HTML5
    PHP
    Laravel
    CSS 3
    jQuery
    AngularJS
  • US$50 hourly

    • 5.0/5
    • (19 jobs)
    I am a full-stack developer with more than 14 years of experience in open-source telephony projects such as Asterisk PBX and FreeSWITCH. I am also part of the team that developed the following open-source communications projects: - ICTCore - ICTFax - ICTBroadcast - ICTContact - ICTCRM I offer expertise in Asterisk, FreeSWITCH, Linux, Telephone Integration, Call-Center Software, Auto & Predictive Dialer, and web-based WebRTC services. Additionally, I have strong skills in PHP Laravel, MySQL database management, and Angular for front-end development. GIVE ME ONE CHANCE TO AMAZE YOU WITH THE QUALITY. I provide high-quality designs with revisions, which guarantees your satisfaction 100% Best Regards Kashif Majeed
    vsuc_fltilesrefresh_TrophyIcon Freeswitch
    Web Development
    Kamailio
    VoIP Software
    FreeSWITCH
    MySQL
    Payment Gateway Integration
    Linux System Administration
    PHP
    Plivo
    WordPress
    Asterisk
    VoIP
    Software Development
    IVR Software
    API Integration
    Vtiger
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At A Glance: FreeSWITCH

Communication is a vital part of the business world. The Internet has provided a wide and varied toolkit for communication through the development of various multimedia technologies, such as voice over Internet protocols, online chatting, and video chatting. These technologies can be combined with traditional telephony to create fully functional communication systems to fit the needs of any size of company. FreeSWITCH is open-source software designed to allow the interconnection of various communication protocols, providing a scalable, multi-platform communication solution for any communication needs. A FreeSWITCH specialist can help you optimize the FreeSWITCH software for your business or project.

A FreeSWITCH specialist is a communications professional with experience in a variety of telephone protocols, voice messaging services, text, and other media formats. A FreeSWITCH specialist can be leveraged as a consultant, helping you identify the needs of your business, developing suggestions and communication solutions, or being relied on to manage and optimize your communication network independently. FreeSWITCH specialists can also embed FreeSWITCH features into websites or webpages, as well as have the software operate as a standalone application. Working with a specialist is an effective way to manage and organize all the different communication components of your business, and since FreeSWITCH is open source, a skilled expert can collaborate with you to implement a highly customized solution for you or your business. Hiring a freelance specialist on Upwork reduces and simplifies the way you and your business communicate.

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