Hire the best Kamailio specialists

Check out Kamailio specialists with the skills you need for your next job.
  • $130 hourly
    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 Kamailio
    Session Initiation Protocol
    C++
    PHP
    Asterisk
    MySQL
    Amazon EC2
    Linux System Administration
    SQL
    Elastix
    A2Billing
    VoIP Administration
    OpenSIPS
    FreePBX
    Virtualization
    Python
  • $70 hourly
    I am consistent "Top Rated Plus" VoIP Developer on Upwork with numerous 5 star reviews including excessively positive feedback. 12+ 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 Kamailio
    MySQL
    OpenSIPS
    FreeSWITCH
    Yii
    PHP
    Yii2
    API
    VoIP Software
    Asterisk
    MariaDB
    Session Initiation Protocol
    Linux System Administration
    Database Administration
    VoIP Administration
    VoIP
  • $45 hourly
    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 Kamailio
    Node.js
    Vue.js
    JavaScript
    PHP
    MySQL Programming
    Asterisk
    FreePBX
    FreeSWITCH
    TypeScript
    Session Initiation Protocol
  • $100 hourly
    Greetings! I am a proficient VoIP developer with a focus on Asterisk, Kamailio, and PHP Laravel, backed by substantial experience in backend development. Beyond this, I possess a strong AI background, enabling me to create cutting-edge VoIP solutions enriched with artificial intelligence capabilities. My Expertise Includes: VoIP: Asterisk, Kamailio, RtpEngine, SIP, RTP, SRTP, Call Center Solutions: Twilio, Sip trunk, Numbers Automation & Autopilot: Enhancing efficiency through smart processes Web Development: PHP Laravel, API development, Laravel Nova, Frontend Technologies: Vuejs, Tailwindcss, TailwindUI Database: Mysql, Redis, JSON for data storage and retrieval Version Control: Git, Github, Gitlab, Bitbucket, Gitflow Agile Project Management: Jira, Scrum, Trello for streamlined collaboration Server & Infrastructure: Linux, Centos, Ubuntu, Firewall, Fail2ban, Virtualization DevOps: Docker, Kubernetes, ensuring smooth and scalable deployments AWS: EKS (Elastic Kubernetes Service), ECS (Elastic Container Service), and comprehensive knowledge of other AWS services for a robust cloud infrastructure. AI Integration: Utilizing AI in VoIP solutions, including Text-to-Speech and Speech Recognition, to deliver personalized and interactive experiences over the phone. Chatbot Implementation: Creating intelligent chatbots for seamless communication and enhanced customer support in VoIP applications. I am enthusiastic about leveraging AI technologies to revolutionize VoIP solutions, providing exceptional user experiences and increased efficiency for your projects. Let's collaborate on long-term ventures and harness the potential of AI to transform your VoIP systems. Please feel free to reach out, and let's explore the possibilities together!
    vsuc_fltilesrefresh_TrophyIcon Kamailio
    VoIP Administration
    Telecommunications
    VoIP
    Application Integration
    Asterisk
    Telecommunications Engineering
    VoIP Software
    Linux System Administration
    API Development
    Laravel
    API Integration
    PHP
  • $150 hourly
    A Top-Rated, Expert-Vetted VoIP/Software engineer with over 20 years of experience. My experience ranges from Asterisk/FreePBX phone systems, SMS messaging, Linux operating systems, to network administration. I believe you deserve a more professional, reliable, and personalized business experience, and I bring that mindset to every project. Whether I’m developing top-secret code for Lockheed Martin, or AI telephone agents for Nomo, or creating privacy-first communications for Mecca Hosting, Inc, or designing secure, high availability Asterisk systems for TeleConnx Inc., or handling difficult troubleshooting tasks, I always commit myself to the same standard: creative, client-first solutions and efficient, high-quality work, completed in a fraction of the time. I have a passion for transforming mundane phone interactions into exciting customer experiences, and I lean on decades of experience to create solutions that others would find impossible. In short, I can make your telephone system do pretty much anything, including turning on your coffee maker in the morning. I look forward to working with you!
    vsuc_fltilesrefresh_TrophyIcon Kamailio
    FreePBX
    MySQL
    Linux System Administration
    Amazon Web Services
    VoIP Administration
    Asterisk
    API Development
    C
    VoIP Software
    LAMP Administration
    Session Initiation Protocol
    Linux
    VoIP
    Business with 10-99 Employees
  • $70 hourly
    I am highly skilled telecom engineer and expert, who not only see the big picture, but can design and implement it, with excellent analytical and problem-solving skills, solid experience in service development, design of distributed systems, high availability database designs, data conversion, migration and integration of databases. Expertise knowledge in data mining, ingestion, consumption, disaster recovery and core analytics solutions. Extensive hands-on experience in Big Data migration projects, Data Analytics, Data Modeling and ETL. I have a huge experience(over 15 years) in running technical teams from software developers, system and network administrators, and can be able to quickly evaluate project needs and provide appropriate solutions in a timely manner. My expertise: Operating Systems Linux, Unix (*BSD, Solaris, HP-UNIX), Windows, Cisco IOS, Mac OS, Android Telecom Cisco, Asterisk, Kamailio, SIP, VoIP, Biiling, IVR, Conferences Virtualization and Containers VmWare, KVM, Vbox, Docker, LXC Protocols VoIP (H323, SIP,MGCP, RTMPx), PSTN(ISDN, SS7, ITP, MAP), SNMP, SSH, DNS, POP3, IMAP, SMTP, FTP, HTTP, NFS, SSL, DHCP, BGP, OSPF, RIP Programing Languages JAVA (SE, EE, JDBC, JPA, JPQL, JSF, JSP, Servlets, Spring), PHP(3, 5, 7), JavaScript (jQuery, Vue), SQL(PLSQL, PGSQL), C / C++, Html, SSML, VXML, TCL-IVR, CSS CI/CD Ansible, JenkinsX Architectures REST, SOAP, WSDL, RPC, Microservices, Pub/Sub, Data transformation DB and MB PostgreSQL, MySQL, Oracle, Mongo, InfluxDB, Redis, RabbitMQ, Kafka ETL Apache NiFi Application Servers Apache, Sun GlassFish, Jetty Version control GIT, SVN, CVS Development environments Eclipse, IntelliJ IDEA, Android Studio, Atom The most intrested projects: Cloud Call Center Software for SaaS Data transformation system (ETL) Cloud PBX, IVR, Queue Software for SaaS Cloud invoice and billing system for SaaS Webrtc2SIP gateway for SaaS Similar service like Viber and Skype A.I. Dialer (pre-dictive, power, agentless, preview) Call routing and billing system Network and service monitoring system Telenor Bulgaria fix network VoLTE Conferencing system Realtime call transcription MCU Conferencing system
    vsuc_fltilesrefresh_TrophyIcon Kamailio
    Amazon Web Services
    Session Initiation Protocol
    SMS Gateway
    WebRTC
    VoIP
    OpenSIPS
    FreeSWITCH
    Asterisk
    Software Design
    JavaScript
    Java
    VoIP Administration
    Telecommunications Engineering
    PHP
  • $50 hourly
    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 Kamailio
    VoIP Software
    VoIP PBX
    VoIP Administration
    Erlang
    Apache CouchDB
    RabbitMQ
    Lua
    PostgreSQL
    MySQL
    OpenSIPS
    FreeSWITCH
    VoIP
  • $40 hourly
    - 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 Kamailio
    FreePBX
    Automatic Speech Recognition
    Linux System Administration
    WebRTC
    Project Management
    Bash
    VoIP Administration
    Asterisk
    Perl
    PHP
    Python
    MySQL
  • $45 hourly
    My experience in the VOIP domain has been for 15 years. My customer satisfaction is my goal. I have extensive experience with Asterisk/Kamailio systems, as well as Linux and network administration. I have the ability to do advanced troubleshooting . My expertise on this: * Asterisk, Kamailio, OpenSips, FreePBX, A2billing, SIP, H323, IAX, Webrtc, hylafax, Asterisk-Pannel, iaxmodem, rtpproxy, MediaProxy, WebRTC, SipML5, SMS API, IVR (Interactive Voice Record),Wireshark * IP routing, router configuration (cisco, iptables routing), switch, Vlan, VPN (Ipsec linux, cisco vpn, fortigate, OpenFire). * Fail2ban, Iptables, OpenSwan, Squid, Cisco FirePower, Vmware, Proxmox * Php, Mysql, Postgresql, sqlite, Mongodb, Bash , LUA , Java, AGI, AMI * Roundcube, Zimbra, Zabbix, Smokeping, munin, Nagios, Cisco NetFlow, Voipmonitor * Git, Ansible, bitbuket, atlassian My time is my value. So when you choosing me you can expect that job will be done in short terms and perfect. I don't like to do something that not need be done. @linkedin linkedincom/in/alaeddine-hertelli/ SKYP:alasupcom1
    vsuc_fltilesrefresh_TrophyIcon Kamailio
    OpenSIPS
    FreePBX
    PostgreSQL
    Wireshark
    Asterisk
    Session Initiation Protocol
    Vtiger
    Iptables
    MySQL
    Bash Programming
    PHP
    Network Engineering
    Linux
    VoIP
  • $40 hourly
    1. Expert in IP solutions (RCS-GSMA) with open source experiences. 2. VOIP solutions can be provided in hours. 3. Having experience in IMS (IP Multimedia Subsystem) solutions. 4. Having 8 years of experience towards kamailio and opensip projects. 5. Expertise in SIP,SDP,RTP,MSRP,HTTP,DIAMETER,SMPP protocols 6. I can develop custom modules in kamailio,opensip projects 7. Moderate in freeswitch, fusion PBX and asterisk 8. Mainly solution architect in VOIP 9. Well experienced with TCP,UDP and SCTP transport stacks. 10. Well experienced with wireshark and Homer utilities
    vsuc_fltilesrefresh_TrophyIcon Kamailio
    Session Initiation Protocol
    IP Multimedia Subsystem
    OpenSIPS
    VoIP Administration
    VoIP Software
    Rich Media
  • $30 hourly
    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 Kamailio
    Video Stream
    Streaming Platform
    Asterisk
    FreeSWITCH
    VoIP Software
    Web Development
    React
    Android App Development
    iOS Development
    Flutter
    Android
    React Native
    PHP
    Node.js
    WebRTC
  • $40 hourly
    I am a VoIP professional with over 12 years of experience. I am an expert in Asterisk, Freeswitch, SIP Trunking and provide consultations on these to my clients. Throughout my experience I have designed and developed a number of VoIP, Telecom Solutions like IVR Systems, Autodialers, Conferencing Solutions and Voice Mail solutions from scratch. I develop solutions over multiple programming languages like Javascript (NodeJS), PHP, Java using Asterisk (ARI, AMI and AGI) and Freeswitch (ESL). I also provide support for installation, configuration and maintenance of Asterisk, Freeswitch and other VoIP Switches.
    vsuc_fltilesrefresh_TrophyIcon Kamailio
    WebRTC
    FreeSWITCH
    Session Initiation Protocol
    VoIP Software
    Asterisk
    Linux System Administration
    JavaScript
    Node.js
    VoIP Administration
    Twilio API
    PHP
    Web Service
  • $30 hourly
    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 Kamailio
    FreeSWITCH
    VoIP Software
    Asterisk
    XMPP
    VoIP
    React Native
    iOS
    Android App Development
    iOS Development
    Mobile App Development
    React
    WebRTC
    Node.js
    Swift
  • $35 hourly
    Over the last 5 years, I have developed a wide range of VOIP projects. Just a brief introduction of things I have worked on. [Opensips/Kamailio] 1. Developed local and International VoIP network (Termination/Origination) with, along redis as cache database and FreeRadius as AAA Sever. 2. Registrar in Type 5 switch with freeswitch as media server. 3. Opensips-CP/SIREMIS. 4. Symmetric Nat solutions with rtpengine/rtpproxy. [Freeswitch] 1. AutoDialer Supporting more that 5000 CC calls using Multiple freeswitch with Golang as ESL. 2. Voip network setup using mod_enum,mod_lcr,mod_nibblebill. 3. Freeswitch realtime implementation using lua/mod_xml_curl [FreeRadius] 1. AAA server and Proxy for other freeradius servers. [Asterisk] 1. Asterisk realtime implementation. 2. AGI/AMI scripts.. 3. Autodialer using pycall. 5. Cisco phones configuration and troubleshooting. [Free-Dialers] 1. Newfies Dialer 2. IctDialer 3. ViciDialer [Zabbix / Monit] 1. Monitorig of different Servers 2. Setting triggers for different services 3. Generating e-mail notifications on triggers 4. Taking required actions to tackle the triggers [Languages] 1. Lua 2. Golang 3. Python
    vsuc_fltilesrefresh_TrophyIcon Kamailio
    Android
    WebRTC
    OpenSIPS
    iOS Development
    FreeSWITCH
    System Administration
    Asterisk
    Session Initiation Protocol
    Golang
  • $25 hourly
    - I have 8 years experience in system admin, deploy server, maintenance system base on: asterisk, voip, avaya, freeswitch, kamailio, opensip..... - Developed many VOIP solutions, system for customer over the world as: voicemail system, conference systems, IVR systems, calling card system. - Django developer: Develop e-commercial sites, CMS sites, API systems and more - AngularJS developer, one page applications. - etc.
    vsuc_fltilesrefresh_TrophyIcon Kamailio
    MySQL Programming
    PostgreSQL Programming
    Linux System Administration
    phpBB
    SQL Programming
    SOAP
    NoSQL Database
    HTML5
    SQL
    PHP
    Perl
    Python
    JSON
    HTML
    Node.js
  • $40 hourly
    With more than 14 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 Kamailio
    Material Design
    XMPP
    Erlang
    Kotlin
    Flutter
    Mobile App Development
    iOS Development
    Firebase
    WebRTC
    Android
    Android App Development
  • $35 hourly
    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 Kamailio
    Linux System Administration
    MySQL
    VICIDIAL
    PHP
    OpenSIPS
    Session Initiation Protocol
    FreePBX
    VoIP Administration
    FreeSWITCH
    Asterisk
  • $45 hourly
    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 Kamailio
    OpenSIPS
    Linux System Administration
    Asterisk
    Elastix
    FreeSWITCH
    VICIDIAL
    VoIP Administration
    WebRTC
    FreePBX
    Microsoft Teams
  • $50 hourly
    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 Kamailio
    React Native
    Session Initiation Protocol
    LLM Prompt Engineering
    LLM Prompt
    Bot Development
    VoIP
    WebRTC
    OpenSIPS
    FreeSWITCH
    Video Stream
    Swift
    Dialogflow
    Artificial Intelligence
    Node.js
    Kotlin
    C++
  • $85 hourly
    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 Kamailio
    VoIP PBX
    Linux
    PBX
    Debian
    VoIP Administration
    API
    Asterisk
    FreeSWITCH
    Session Initiation Protocol
    OpenSIPS
    Amazon EC2
    VoIP Software
    Laravel
    WebRTC
  • $50 hourly
    I have worked on front-end and back-end sides as a javascript developer with Angular, Nodejs, NestJs, Express, MongoDB technologies. I have experience in wide range of javascript ecosystem Also, I'm an experienced VOIP engineer who has worked on Asterisk, Kamailio, RTPEngine. I can write a custom module for Asterisk in C and dial plans, configurations, etc. I can configure Kamailio modules like auth_db, dispatcher, htable, mtree, db_redis, uac, etc. I have experience in FreePBX and FusionPBX. I know the fundamentals of SIP and RTP protocols also experienced on Rtpengine I lead/work numerous projects with an Agile Methodologies(Scrum/Kanban). Which means that I can easily adapt and respond to change. I also had my hands dirty in python, c, and java Skills: - Javascript, Typescript - Angular - Nodejs and express - NestJS framework - Docker - VOIP - WebRTC - Asterisk - Kamailio - Rtpengine - Microservices - MongoDB - Redis - RabbitMQ / NATS
    vsuc_fltilesrefresh_TrophyIcon Kamailio
    Video Stream
    WebRTC
    Session Initiation Protocol
    VoIP
    Asterisk
    NestJS
    TypeScript
    Node.js
    JavaScript
    Angular
  • $50 hourly
    - Technologies: Kamailio, RTPEngine, Freeswitch, WebRTC, Flexisip, Asterisk - Protocols: SIP, SDP, RTP, websocket - Test Tools: sipp, sipsak, twinkle-console - Debug Tools: sngrep, ngrep, tcpdump, wireshark
    vsuc_fltilesrefresh_TrophyIcon Kamailio
    VoIP Software
    VoIP
    Ansible
    C++
    Bash
    VoIP Administration
    C
    Network Engineering
    Software Debugging
    Python
  • $72 hourly
    For the past few years, I have been employed as a VoIP engineer and have aided numerous businesses with their customer acquisition, customer support, and overall communication through my services, including system design, setup, customisation, and maintenance. Communication is an essential element in any business, and my expertise can assist in constructing a dependable communication tool for your company. My primary areas of expertise are: - FreeSWITCH - Kamailio, OpenSIPS - Programming languages such as Python, Lua, PHP - Database management using PostgreSQL and MySQL - Server administration, Docker, and AWS. Thank you, Mohammad Kamruzzaman
    vsuc_fltilesrefresh_TrophyIcon Kamailio
    Fax
    Node.js
    OpenSIPS
    VoIP Software
    VoIP PBX
    Flutter
    VoIP
    VoIP Administration
    FreeSWITCH
    Business with 1-9 Employees
    Django
    MySQL
    Laravel
    MongoDB
    Python
  • $60 hourly
    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 Kamailio
    Tableau
    Session Initiation Protocol
    FreeSWITCH
    Asterisk
    Desktop Application
    React Native
    C++
    Android
    C
    Microsoft Windows
    Swift
    React
    Flutter
    WebRTC
    C#
  • $150 hourly
    Feedback: 💭 "Roman has a vast knowledge of what he is doing and really good at what should be done" 💭 "He has good social skills; is patient and a good communicator. His skills are very much in demand" 💭 "If some solution does not work or is not possible Roman will find another way to get the task done" 💭 "His research is solid, resulting in a good overview of possibilities to (re-)direct the project" Expertise: Streaming & Multimedia: 📺 Media applications (ffmpeg, gstreamer, opencv) 🎛 Media services (kurento, mediasoup, janus, wowza) 📹 Streaming protocols (webrtc, hls, dash, rtmp, rtsp) 🧩 Codecs and Muxers (h.264/avc, h.265/hevc, av1, vp9) 📐️ GPU programming (opengl, opencl, cuda, vulkan, hip) 📠 IP Telephony (asterisk, freeswitch, sip, voip) DevOps & Cloud & IoT: ☁️ Cloud Infrastructure (aws, ansible, terraform, kubernetes) ⛓ Build and test automation (jenkins, gitlab, ci/cd pipelines) 🔗 Tunneling protocols (openvpn, wireguard, gre, ipsec) 🧶 Bulk networking (dpdk, bpf/ebpf, xdp) 📦 Virtualization (kvm, qemu, crosvm, virtio) 🔋️ IoT / Embedded (raspberry pi, jetson, nordic, ble) 💻️ Linux deployment (containers, docker, yocto) Software development: 🐍️ Python (flask, asyncio, fastapi, websockets) 🍀️ C/C++ (qt, cmake, meson, kernel, ndk, maths) ⚙ Rust (cargo, actix, tokio, rayon, solana) 🛠 Reverse engineering (disassembling, protocols)
    vsuc_fltilesrefresh_TrophyIcon Kamailio
    WebRTC
    Kernel
    FFmpeg
    Docker
    CUDA
    Video Processing
    Internet of Things
    GStreamer
    Rust
    Amazon Web Services
    DevOps
    Python
    C++
    Embedded Linux
    C
  • $130 hourly
    I provide solutions in the field of video streaming, webinars, video chats, video recording and post-processing, collaging, video editors and online video streaming processors, as well as screen capture/sharing, remote control, application sharing and whiteboard applications for both web, mobile, and desktop downloadable apps. With 18 years of software engineering experience and a large collection of ready and owned, available for adaptation and integration source code, i provide cost-efficient solutions for a wide range of customer cases. This made me a top #1 Upwork contractor in European Union(*). Prime example of my work is WebinarHD - a popular webinar platform wholly built by me and my team, employing Single Stream technology which combines all streams comprising the webinar broadcast such as webcams, screen shares, documents, live streams, as well as audio streams from mics, into a single composite stream to broadcast to attendees saving bandwidth and improving quality and synchronisation. Big success in sales, in active use by over 1100 webinar hosts, running regular webinars on every topic from marketing to religion. Also, i have a huge experience building networking-intensive applications. A lot of experience with pubnub, rtmp/rtmfp, webrtc, building custom binary protocols and implementations (both TCP and UDP based, for example: hand-hacking DNS requests). My customers include Cedexis and Pubnub. Some of my less-recent and somewhat obsolete areas of knowledge are the Adobe stack (Actionscript 2/3) and low-level undocumented file format analysis and synthesis: 7 years as a head of all development for OfficeRecovery, inc. (now part of Axcient) (*) Based on total amount earned. Excludes contractors staffed by agencies and contractors with profiles hidden from public view.
    vsuc_fltilesrefresh_TrophyIcon Kamailio
    Kurento
    FFmpeg
    NGINX
    Video Stream
    Wowza Media Server
    Node.js
    WebRTC
    AngularJS
    C
    JavaScript
  • $22 hourly
    Expert in resolving any IT related issues, scrutinize to understand root cause of issues for troubleshooting to permanently sort it out Exchange, Active directory, Domain, File and Print server Administration Configure / Setup, Manage backups as well as fix issues that arise Office 365 administration, Exchange, Azure Active Directory, SharePoint OneDrive, Mfa setup and configuration Administration, support and configuration of MS Office O365 for staff Educating and assisting end-users on O365 capabilities and collaboration tools (OneDrive, Teams, Outlook, and other office products such as excel word, etc..) Web-hosting and website development (Joomla and WordPress) JavaScript, html, css, php AWS, GCP, Ubuntu
    vsuc_fltilesrefresh_TrophyIcon Kamailio
    VoIP
    IT Service Management
    Web Hosting
    Technical Support
    Desktop Support
    Office 365
    Microsoft Active Directory
    Microsoft Exchange Server
    System Administration
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