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Check out VOIP Software Engineers with the skills you need for your next job.
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Clients rate VOIP Software Engineers
Rating is 4.8 out of 5.
4.8/5
based on 209 client reviews
  2. Development & IT Talent
  3. Full Stack Developers
  4. (Current) VOIP Software Engineers
  • $15 hourly

    • 4.6/5
    • (15 jobs)
    I have an experience of designing embedded products for 9 years, I have worked on customized boards for board bring up and device driver development, Network driver development and modification as per the needs, RF communication like WI-FI (up to IEEE802.11ac and with IEEE802.11s (wireless mesh network)) and other proprietary wireless modules like CC2500, CC1101, GSM, GPS. I have worked on Processors like Qualcomm Snapdragon 650, 670, 710, 845, 855, Zynq Ultrascale Plus from Xilinx, PXAxxx from Marvell semiconductor, Broadcom's bcmxxxx, NXP's Imx6 and imx7ul for Android of things os and embedded Linux with their proprietary protocols for communicating to cloud (weave, now firebase). In addition to this I have also worked on Intel Edison for product development. I have worked on micro controllers like STM32Fxx, STM8Lxx, Arduino, MSP430xx, Microchip, Marvell Semiconductor micro-controllers. Along with that I have an experience of designing Linux based applications using C/ C++ which can be scaled for different architectures. I also have an experience in designing Layouts of digital circuits containing micro-controllers and other peripherals of up to 16 layers using Altium. Basically I am an electronics and telecommunication engineer, I passed my graduation in 2012. I can design products from the scratch to the mass production. Here are the example. 1. Device driver developer for Qualcomm Snapdragon camera SoCs which includes ISP, ICP, JPEG,FD and Camera Request Manager drivers. 2. Given support to bring up the QSPI, SPI and RTC linux device drivers in Xilinx zynq and zynq ultrascale platform SoCs. 3. Gave support to SONY for their BSP and guided them to get the device certified in USB battery charging specification. 3. Compiling packages for router boards in Linux. 4. Weighing scale based process automation. 6. Pedometer using STM32F407 ARM+DSP processor. 7. Door Interlocking System. 8. Feather Touch Operated Switch. 9. RF ID access control. 10. Mouse Extenders based on PS/2 mouse and RS-485 protocol for. 11. Boom Barrier System based on ATmega16.
    vsuc_fltilesrefresh_TrophyIcon VOIP Software
    Android App Development
    LoRa
    ARM Cortex-M
    Kernel
    Raspberry Pi
    Bluetooth Beacon
    C
    C++
    Embedded System
    Wireless Network Implementation
    Bluetooth LE
    Wireless Security
    WiFi
    Serial Port Interfacing
    Product Design
    Embedded Linux
    Driver Development
    Microcontroller Programming
    Android NDK
    Bluetooth
  • $30 hourly

    • 5.0/5
    • (12 jobs)
    I am a passionate Network Engineer with 8 + years of experience. My core strengths are configuration and troubleshooting data, voice and video environments. Expert in Microsoft Teams Direct Routing, PBX, SBC, Ribbon Communications, Sangoma, Gateways, IP Phones, Core Infrastructure. I have a working knowledge of establishing core and enterprise-level VoIP services and integrating audio and video in Microsoft Teams. I can provide a complete end-to-end solution for MS Teams Direct Routing, including the software. I am an artist with good experience in Voice overs for commercials, narrations, explainer videos, and simple marketing videos.
    vsuc_fltilesrefresh_TrophyIcon VOIP Software
    Telephone System
    VoIP Software
    VoIP PBX
    Cloud Engineering
    Information Technology Strategy
    Microsoft Teams
    VoIP
    Information & Communications Technology
    VoIP Administration
    Solution Architecture
    Network Administration
    Session Initiation Protocol
    VMware vSphere
    Office 365
  • $45 hourly

    • 5.0/5
    • (39 jobs)
    I am Microsft Certified System Engineer and have working experience in Networking / Systems and Cloud IP Phone Systems. * Phone System Installations and Configurations (3CX, Avaya IP Manager, Vital PBX, Genesys Cloud, Alcatel, Cisco, Asterisk Server, etc.) * Remote Support For MS Windows, MS Server, Phone systems configurations * Windows Server 2008,2012,2016,2019 Full Support * All Kind Of Software Installation * Server Backups * Basic Troubleshooting for all OEMs mentioned above * Best Customer Services Guranteed
    vsuc_fltilesrefresh_TrophyIcon VOIP Software
    PBX
    Session Initiation Protocol
    Microsoft Windows
    Technical Support
    Grandstream
    VoIP
    Linux
    Phone Communication
    Twilio
    3CX
    VoIP Software
    Microsoft Teams
    VoIP Administration
    CallTools Call Center Software
    Call Center Management
  • $40 hourly

    • 5.0/5
    • (3 jobs)
    I'm a Voice Engineer / Python Developer with years of hands-on experience with Asterisk in call center environments. I like to work smart and organized, providing results with close to no supervision, always driven by best practices and solid approaches to requests and challenges. I consider myself a people-oriented person with a high tolerance for adaptability. I do my best to be productive, proactive, and efficient daily, improving my technical skills by exploring new technologies and be curious about every technical aspect around my area of expertise. One of the favorite projects I've worked on was the integration of Web Applications via Python Flask API with Asterisk. Another thing I've enjoyed work with has been WebRTC; I find its nature and flexibility(Browser-based) fascinating. I definitively find myself comfortable working in Linux environments. I've had the chance to work with environments with high server density, where monitoring and server optimization is a must.
    vsuc_fltilesrefresh_TrophyIcon VOIP Software
    Linux System Administration
    JavaScript
    Flask
    FreePBX
    VoIP
    System Deployment
    Session Initiation Protocol
    WebRTC
    Python Script
    Linux System Administration
    CentOS
    Asterisk
  • $15 hourly

    • 4.9/5
    • (58 jobs)
    I am a freelancer with more than 20+ years of experience in ICT Industry. I have been working as Support Desk Tech, Solution Support Engineer, Solution Architect, Solution Manger and Consultant in the area of Internet based Servers and Services, Networking, Cloud Solutions, VoIP Solutions, Streaming Solutions in the State-owned Telecommunication provider, Internet Service Provider, International ICT Company and several System Integrator in past. My expert areas are, • Linux and Windows based solutions (mail, web, dns, ftp, proxy, etc.,) , • Open Source and commercial products (any opensource product in the market) • Voice Over IP solutions (IPPBX, Call centers, Dialers, etc.) • Networking and Security solutions (proxy, firewalls, vpn etc.,) • Virtualization (VMWare, Docker, Kubernetes, OpenStack etc.,) • Cloud Technologies (Google, AWS, Azure, Digital Ocean, etc.,) It doesn’t matter the Linux distribution either RedHat, CentOS, Ubuntu, Debian, openSUSE, Fedora, etc., or any sub distro, I can work with any distro, because every Linux distro is built with Kernel+Base System+Other Application Softwares. Therefor I can work with any software which developed for Linux (or Windows) in installing, configuring, put it in to production, later troubleshooting and supporting to the customers. At the same time, I have very good customer feedbacks in Upwork work history because of my quality of work. I would like to work as part time freelancer and my time zone is GMT +5.30 (Asia/Colombo). Wish you all the best and good luck.
    vsuc_fltilesrefresh_TrophyIcon VOIP Software
    Administrative Support
    FreePBX
    Technical Support
    System Administration
    Bash Programming
    Mail Server Implementation
    Squid
    Postfix SMTP Server
    Sendmail
    Ubuntu
    CentOS
    PHP
    Elastix
    Asterisk
    Linux System Administration
  • $150 hourly

    • 5.0/5
    • (223 jobs)
    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 VOIP Software
    FreePBX
    MySQL
    Kamailio
    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
  • $95 hourly

    • 5.0/5
    • (6 jobs)
    16 years of building/maintaining/upgrading/securing/configuring computers 16 years of RedHat/CentOS/Debian Linux programming/administration 16 years of Microsoft Windows XP/NT/2k/2k3 workstation/server experience 16 years of TCP/IP Routing/NAT/Firewall using Cisco/Checkpoint/Linux/BSD 16 years of VoIP H.323/SIP/IAX with Asterisk/Kamailio/Freeswitch/Cisco 16 years of HTML/JS/CSS/PHP/PERL/BASH web-application development 9 Years of VMWare/ESXi/LXC/iSCSI/SAS virtualization/storage management 6 years of Audio/Video streaming using Flash/VideoLAN/Red5/Quicktime/HTML5 4 years of Docker/Kubernetes/Ansible/Terraform application development/deployment 4 years of Apple iOS/Android/Unity/Blender3D game/application development 3 years of HTML5/Full Stack Javascript/WebRTC testing/development
    vsuc_fltilesrefresh_TrophyIcon VOIP Software
    Amazon ECS
    Amazon EC2
    VoIP Software
    Session Initiation Protocol
    AWS CloudFront
    Docker
    Kamailio
    AngularJS
    JavaScript
    NGINX
    FreeSWITCH
    Asterisk
  • $50 hourly

    • 5.0/5
    • (64 jobs)
    Asterisk | Kamailio | FreePBX | Big data | AWS |Azure |GCP | Linux | Unix | Ubuntu | Debian | Puppy | VoIP Expert | IBM Watson | Google API | A2Billing | WebRTC | PHP | JSP | MYSQL | Oracle|Ansible|Docker Thanks for looking at my profile! I'm an IT Engineer offering more than 15 years of professional-level experience. I have deployed many Enterprise and Mid-Size Cloud, Network, and VoIP solutions worldwide. I am a professional Freelancer under a single roof with excellent communication skills, a fast learner, computer literate, can handle multitasking work and a very reliable contractor. Particularly interested in client/server and relational network design & develop using C/C++,Java,Php and C#. Always been interested in migration projects, as well as close interaction with the VoIP platform. I am always eager to provide quality work to my honorable clients. Hourly or fixed-price contract rates are negotiable depending on the work. I’m always working in a friendly environment so that we can make long-term business relationships, and feel honored to have a continuously growing list of happy clients with positive feedback on my work. I will do my best to satisfy my clients to the fullest. Do not hesitate to ask any questions you may have or discuss any ideas I may help you with. I am very easy to talk with.
    vsuc_fltilesrefresh_TrophyIcon VOIP Software
    VoIP Software
    Natural Language Processing
    MySQL
    Linux System Administration
    Telecommunications Engineering
    IBM Watson
    VoIP Administration
    Asterisk
    FreePBX
    Session Initiation Protocol
    Red Hat Enterprise Linux
    VICIDIAL
    Google APIs
    Amazon Web Services
  • $25 hourly

    • 4.7/5
    • (75 jobs)
    Experienced in software testing process including executing tests, recording results,testing reports & tracking defects.load and performance testing. Well Versed with Selenium to automate websites using Java. Hands on Apache Jmeter 3.0 Use of SQL to query the database for testing and to extract data. Beta Testing & giving feedback on mobile & web apps. Devices available for testing: Windows 8.1-Browser IE 11, Chrome, Firefox Windows 10-Browser Microsoft Edge, IE 11, Chrome ipad mini 2-Browser safari iPhone 5s Kindle fire HDX tab Automation Testing : HP-UFT, Test Management Tool: HP QC/ALM Mobile Devices: Apple---,Iphonex,IPhone 8+,IPhone 7,iPhone 6 (IOS 11),IPhone 5s,iPad Air. Android-Samsung J7,Motorola C,Redmi Note 3,Google Nexus,One Plus 5. ★ QA Services: ✅Manual/Automation Testing ✅Functional Testing ✅Performance Testing ✅Security/Penetration Testing ✅Usability Testing ✅Test Automation ✅ Mobile App Testing (IOS/Android) ✅Basic knowledge of HTML, CSS and SQL and Java programming ✅ User Acceptance Testing ✅ Experience in SOAP API and REST API ✅Linux / Windows / OS X based systems; ★QA Process Expertise: ✅Test Plan creation ✅Test case creation ★Methodologies: ✅ Project Management ✅ SDLC ✅ Agile/Scrum ★Defect Management tool: ✅JIRA/HP ALM/Trello ★Other Technical Skill: Microsoft SQL 2008 • WCF Test Client • Postman • Microsoft Office (Word, Excel, PowerPoint, Outlook) • Xero • Zappier • Ginger • HP Quality Center • MSSQL • Toad Oracle • Microsoft Visual Studio 2012 • PowerBI •
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    English
    Education
    Manual Testing
    Jenkins
    Appium
    Selenium WebDriver
    Selenium
    Performance Testing
    Game Testing
    Regression Testing
    Functional Testing
    Black Box Testing
    Software Testing
  • $75 hourly

    • 5.0/5
    • (33 jobs)
    With nearly 30 years of experience working across every IT platform, from MS-DOS, Novell Netware, Windows NT ... to every major platform on-premise and in the cloud today, there is not much I haven't worked with. I am a software developer who crossed over into hardware, then network engineering and administration. I work predominantly in cloud computing and datacentre’s space; this gives me the ability to understand how the software integrates into the hardware and network platforms very well. As CEO of my UpWork agency, vCloud Group - Global Cloud Services, I tend to work in all areas of Information Technology and Communications. Anything from desktop and workstations, to server systems, running Exchange, SQL Server, Oracle, Azure Integration, and system services like Disaster Recovery / Business Continuity, Multi-Site Cloud Networks and VoIP-based phone system. I am always working with my team to find the best possible solution for a client; I am not scared to advise you of a better solution that I believe you deserve or do better with. We have had several clients who started with one solution, then ended up with a better solution that exceeded their expectations. My experience has allowed me to work in areas: • IT systems and management, • technical support, and • project management. My focus areas on UpWork are: • Building of dedicated cloud networks in all major data centres, • VMWare vSphere/ESXi Hypervisor 5, 5.5, 6, 6.5, 6.7, 7.0, • VMWare vCenter 5.0, 6.0, 7.0, • VMWare Horizon View 4, 5, 6, 7, 8 all versions, • Microsoft Windows 10/11 all versions, • Microsoft Windows Server 2012/2016/2019/2022 all versions, • Linux all versions, • Dedicated Hosting Server i.e., cPanel/WHM, Plesk, CyberPanel, • Hosting Migrations from/to cPanel/WHM, Plesk or CyberPanel, • System Migrations, on-premise, cloud or hybrid (both), • Email Migrations (Google, Office 365 Migrations, and any to any), • VoIP Phone Systems, built-in any datacentre worldwide • All backup solution software on-premises or in the cloud. I am more than happy to discuss and look at projects first before accepting a contract; I ask many questions, and I double-check and follow up on everything I do. I hope to work with you soon.
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    Office 365
    Web Hosting
    cPanel
    WordPress
    WebHost Manager (WHM)
    VoIP Administration
    3CX
    VMware Administration
    VMware vSphere
    Linux System Administration
    Microsoft SQL Server Administration
    Microsoft Exchange Server
    Windows Server
    Computer Network
    Cloud Computing
  • $30 hourly

    • 5.0/5
    • (207 jobs)
    "Working with Becky has been an amazing experience. She is professional, hard-working, and extremely dedicated. She is always up for a challenge. I wouldn't hesitate to recommend her and would definitely work with her again. Thank you, Becky :)" "We've had a great experience working with Rebecca, a talented writer and all work has been delivered in a timely manner. 100% would use again - thanks!" Effective content marketing is harder than ever. But when done correctly, content marketing provides conversion rates about 6 times higher than other digital marketing methods. I solve your content problems with a data-backed content strategy, expert writing, and meticulous editing. ➡️ What I do: I am a writer specializing in SaaS, digital marketing, eCommerce, lead generation, SEO, website hosting, and website development. ➡️ Who I work with: My past and present clients include AB Tasty, authority website hosting review blog, WebsitePlanet.com, Gmelius, and London-based SEO agency, Bubblegum SEO, and AdScale. I have also ghostwritten for large websites like projecttimes.com and project-management.com. ➡️ Contact me today. I'd love to help you meet your content marketing goals. Thanks, Becky
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    SEO Writing
    Search Engine Optimization
    Content Management
    Content Strategy
    Content Creation
    Content Planning
    Content Writing
    Content Editing
    Content Audit
    Content SEO
  • $25 hourly

    • 4.3/5
    • (117 jobs)
    Hello, Thanks for visiting my profile. This is Abid Ur Rehman, Certified Asterisk dCAP, VICIDial, FreePBX SCE, 3CX 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. Graduated in BS Telecommunication and 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, Techloyce, Dialer360 and PrimoDialer. Skills and Certification: IP PBX: 3CX, Asterisk, FreePBX, Elastix, PBXWare MT, FreeSWITCH, FusionPBX, Issabel, VoIPOffice Bitrix24 Integration with FreePBX with/without InforUnity module and 3CX Pro/Enterprise. SMS Blast/Broadcast using SignalWire, VoIP.ms, Telnyx, Anveo, Bandwidth.com, Plivo, Skyetel, Twilio, VoxTelesys, BulkSolutions, Flowroute, Intelepeer. Telecom Billing: A2Billing, ASTPP, ConnectCX, VOS3000 Dialer: VoiceBroadcast, VICIDial, GoAutoDial, VICIBox Multi-Server Clustering, Dialer360, PrimoDialer 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, Zyco, Grandstream UCM, Yeaster S-series, Renegadepbx-1U-Appliance-with-FreePBX, Xorcom, Patton's SmartNode Branch eXchange (SNBX), SwitchVox, OpenVox, CXT4000 enterprise phone system, VoIP Providers: USA: Twilio, VoIP.ms, Switch2VOIP, SignalWire, Anveo, Alcazarnetwork, voxbeam, RingCentral, Call Centric, Voyant(Vitelity), Nextiva, bandwidth.com, Altotelecom, FlowRoute, QuestBlue, sip.us, DIDLogic, Nexmo, Plivo, siptrunk.com, Telnyx, IDTExpress, Zadarna UK: BT, VoIPTalk, DrayTEL, Telappliant, Gamma, sipgate, VoIPFone, VoiceFlex Linux Distro: CentOS, Redhat EL, Ubuntu, OpenSUSE, Debian, Mint, BackTrack(Kali Linux) Windows machines: Windows Server 2012 and 2016, Windows Desktop 10, 8 and 7. Cloud Platforms: AWS, GCP, Vultr, BlueHost, HostGear, Hetzner, Digital Ocean HyperVisor: VMware ESXi and player, VirtualBox, ProxMox, oVirt, HyperV, I would be very happy to assist start up as well as SMEs in achieving their goals and business boasting. Thank you !!
    vsuc_fltilesrefresh_TrophyIcon VOIP Software
    Twilio
    VoIP Administration
    PBX
    Full-Stack Development
    VoIP PBX
    MySQL
    A2Billing
    3CX
    Kamailio
    Asterisk
    FreeSWITCH
    Linux System Administration
    FreePBX
    VICIDIAL
    VoIP
  • $22 hourly

    • 4.6/5
    • (340 jobs)
    Upwork Stats: 20k+ hours booked with nearly $800k+ Revenue, 100% Completion ratio, and more than 250s satisfied customers. We are a "Top-Rated Plus Team" well versed in developing Native( iPhone/iPad Apps, Android, iOS, Kotlin, Swift) Applications & Cross-Platform Applications(React Native). We all have vast experience in developing applications. Expertise in SQLite, Data-Driven App, XML or JSON, Reach Native UI, and Social Media Integration. I have developed a wide range of applications using SQL Server, Linq, CSS, HTML, WCF, MVC, JavaScript, and JQuery. - Android, JAVA, Kotlin - iOS, Swift, Objective C - Firebase - React Native, Native, - Web services, HTTP, JSON, XML, RSS, SOAP, PHP, HTML - Social Networking Integration: Facebook, Twitter, Tumblr, Flickr, Instagram, Google plus - Push and Local Notifications, Calendar, Alarm Applications - Google API for MAP, Calendar, Google Drive, and other cloud services - Live streaming, Audio, and Video - Image processing, Photo Filtering and Effect, Custom Camera design and Development - Image Editing, Image Filtering, and Camera - Parse.com integration - The Second Payments Services Directive (PSD2), Strong Customer Authentication (SCA), 3-D Secure (3DS) ✅ Payment Method Integration : ◆ Paypal ◆ Authorize.Net ◆ Stripe ◆ Amazon Payments ◆ SecurePay ◆ Square Payments Buzz Words: React (ReactJS, React Native, React developer), PWA, Progressive Web App, web developer, web development
    vsuc_fltilesrefresh_TrophyIcon VOIP Software
    Ionic Framework
    Android
    React Native
    Xamarin
    WebRTC
    Flutter
    iOS Development
    Dart
    SQLite
    Node.js
    Swift
    Firebase
    Twilio API
    C#
    Mobile App
  • $30 hourly

    • 4.0/5
    • (64 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 VOIP Software
    VoIP Software
    Elastix
    Microsoft Azure
    VoIP PBX
    3CX
    VoIP Administration
    Virtualization
    Network Engineering
    Asterisk
    FreePBX
    VMware Administration
    Zimbra Administration
    VICIDIAL
    Linux System Administration
    CentOS
  • $40 hourly

    • 4.9/5
    • (130 jobs)
    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
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    Material Design
    XMPP
    Erlang
    Flutter
    Mobile App Development
    iOS Development
    Firebase
    WebRTC
    Android
    Android App Development
  • $10 hourly

    • 5.0/5
    • (3 jobs)
    Bertrand Ndakena has a M.A. in Telecoms. He is a Udacity certified cloud developer and self-taught cloud administrator. Passionate about cloud developments/operations. Also interested in AI/ML and Data Science. Has extensive experience setting up cloud solutions(both open source and proprietary) and VOIP(including SIP-based) solutions.
    vsuc_fltilesrefresh_TrophyIcon VOIP Software
    VoIP
    Session Initiation Protocol
    VoIP Software
    WebRTC
    Service Cloud Administration
    Elastix
    A2Billing
    VoIP Administration
    3CX
    VICIDIAL
    Asterisk
    FreePBX
    FreeSWITCH
  • $25 hourly

    • 5.0/5
    • (4 jobs)
    We are a creatives folks and expert Mobile App Development (Android, iOS or Hybrid App) for your mobile app (Android, IOS, Iphone) requirements. we can develop android and ios applications with high standards with great quality in mobile app development.
    vsuc_fltilesrefresh_TrophyIcon VOIP Software
    VoIP
    Android SDK
    Google Ads
    VoIP Software
    RESTful API
    API
    Mobile UI Design
    Android
    Android App Development
    Firebase
    Android Studio
    API Integration
    Google Analytics
    Retrofit
  • $95 hourly

    • 5.0/5
    • (81 jobs)
    Top-rated Plus for Website Development, Digital Marketing, & Software Services. I have 10+ years of experience and the best client feedback. I design modern mobile-responsive websites, provide digital marketing and software services. Website Services - Website Development - Shopify and Shopify Plus Support - Shopify Theme Development - WordPress Theme Development - WordPress Support Digital Marketing Services - Search Engine Optimization (SEO) - Conversion Rate Optimization - Email & SMS Marketing - Google Adwords (PPC) Software Consulting and IT Support - CRM's | HubSpot, SalesForce, PipeDrive - CDM | SmartSheet - CPQ | Vendavo - VOIP | RingCentral - MS Office and Gsuite
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    Email Marketing
    Shopify
    WordPress
    Digital Marketing
    Magento 2
    VoIP Administration
    HubSpot
    Web Development
    Web Design
    Information Technology Operations
    CPQ Software
    CRM Software
    VoIP Software
    Google Ads
    Search Engine Optimization
  • $15 hourly

    • 5.0/5
    • (7 jobs)
    I am enthusiastic and passionate programmer working on the latest technologies, building valuable softwares, provide solutions.
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    Microsoft Excel
    JavaScript
    Data Scraping
    API
    Data Extraction
    ETL
    NodeJS Framework
    Ecommerce
    Data Migration
    MySQL
    Microsoft SQL Server
    Custom App
    C#
    ASP.NET MVC
  • $70 hourly

    • 5.0/5
    • (9 jobs)
    23+ years experience in Planning, Designing, Development, Deployment & Management of Carrier grade, fault tolerant converged Media Solutions. Successfully completed UC Voice/Video conferencing solutions development for multiple companies. On hands with Open-Source & Proprietary VoIP switches and billings (Including but not limited to Voice-Master, MVTS, iTel, AVP, GnuGK, Asterisk, FreeSWITCH, OpenSIPS, Kamalio, Call-Weaver and YATE etc.) and also developed custom solutions from scratch.
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    Web Development
    VoIP Administration
    Linux System Administration
    Kamailio
    FreeSWITCH
    Asterisk
    Mobile App Development
    Call Center Management
    CallTools Call Center Software
    VoIP Software
  • $50 hourly

    • 4.9/5
    • (133 jobs)
    Over 25 years of progressive experience in Network Protocols, Communication Network and Firewalls. Comprehensive network technology knowledge in designing, implementation, administration and support. In-depth knowledge of deploying IP protocols and troubleshooting. Experienced in layer 2 switching and 3 routing, security and wireless. Extensive experience in Planning, Implementation, Configuring, Testing and Troubleshooting of networking system. Competent in handling escalating problems. 7+ years as a Cisco Networking Academy Manager and Instructor. In-depth knowledge of major server OSes. Exceptional analytical abilities. Confident, polite and patient.
    vsuc_fltilesrefresh_TrophyIcon VOIP Software
    PfSense
    Proxmox VE
    Wireless Network Implementation
    VPN
    Wireless Security
    Ubuntu
    Cisco Certified Design Associate
    OpenVPN
    Server Virtualization
    Linux System Administration
    Cisco IOS
    Network Design
    Cisco Certified Network Associate
    Network Security
  • $25 hourly

    • 4.5/5
    • (32 jobs)
    I am a Network Engineer with experience of more than 8 years. I have good skills in both system administration/integration and software engineering. I have had a good experience with Linux system administration, VoIP and SS7/SIGTRAN solutions and some cloud computing using docker. I have a very good experience with C/C++, JAVA, C#, node.js, socket.io, php programming languages.
    vsuc_fltilesrefresh_TrophyIcon VOIP Software
    SMS Gateway
    SMS
    API
    Linux System Administration
    JavaScript
    VoIP Administration
    Linux
    Kannel
    SMPP
    Docker
    PHP
    HTML
    Asterisk
    C++
    C
  • $40 hourly

    • 5.0/5
    • (3 jobs)
    I'am PhD student at top ukrainian university (Applied cryptology). 3+ years of C/C++ experience in commercial software development. Projects mostly about cryptography and security. Keywords: C, C++, Cryptography, Git, bash, CMake, Make, Docker, OpenSSL, OpenVPN, Algorithms, PKCS #11, TLS.
    vsuc_fltilesrefresh_TrophyIcon VOIP Software
    NGINX
    OpenVPN
    Network Security
    TLS1.2
    SSL
    Elliptic Curve Cryptography
    Cryptography
    C
    C++
  • $29 hourly

    • 4.9/5
    • (194 jobs)
    🌟 TOP-RATED PLUS consistently From the Last 5 Years. 🏆 190+ Successful Projects On Upwork. 🏅 14000+ Upwork Hours 🏅 𝟭3+ 𝘆𝗲𝗮𝗿𝘀 𝗘𝘅𝗽. 🏅 Worked with Fortune 250+ companies 🏆 Certified AWS, ReactJS I'm an Upwork’s Top Rated (Top 3%) Plus responsible and reliable person. I am capable of working alone as well as being a team player. I can build a site from scratch, or I can continue working with existing code. Do not be confused that I am affiliated with an agency. I am the Founder & CEO of this IT company whi is delivering integrated business intelligence software solutions for the past decade; I have an experienced technologist with a demonstrated history of thought leadership with solid business development skills in building Enterprises Web Applications, and federal and commercial markets. Still, I work as an independent full-stack developer. Being a Full Stack Developer, I'm able to build an entire system from scratch, both back-end and front-end, starting from a project specification in Schemas and design finishing ready server application with all necessary maintenance and further upgrades. I am an expert in build Enterprises Web Applications, Open Source PHP Web Frameworks Development & Management, E-Commerce Custom Development, CMS-based API Development, Databases handling & maintenance, and UI/UX/Wire-framing. If want to hire me, then please read this carefully. ✓ For Hourly projects, we don’t work under $15/hour; we only do ethical rendered billing. ✓ For Fixed projects, we don't start without upfront token money, escrow milestones. ✓ We are available for call anytime on our US Toll-Free No; visit our Website. Why should you hire me? ✅ 182+ Happy Customers with Five Star Feedback. ✅ 11,300+ Verified Business Hours completed, With 85% Client retention ratio. ✅ Earned Top-Rated Service provider badge on Upwork with a success score of 100%. ✅ Client 100% satisfaction with 100% Money Back Guarantee. ✅ Managed more than 2,265+ project estimations and understandings of project scope & flow. ✅ Handling Skilled IT professionals team Size:- 25+ Full-time Employees. ✅ Flexible Engagement Models & 24/7 support across all time zones. ✅ 12+ years of experience in the outsourcing industry. ✅ 50 MBPS high-speed connection with 24-hour Power backup. ✅ Seamless communication, response & updates in less than 12 hours. ✅ 570+ clients spread across diverse business verticals, 11+ industry Verticals. ✅ Work through PMS System (Bitrix24 & Teamwork) with daily status reporting. ✅ The one-stop shop for all IT needs, aReliable disaster recovery system. ✅ Socially Active as NASSCOM Member, ESC Member, CII Member. ✅ Expertise in business domains: Real Estate, Travel, Healthcare, Finance, Insurance, B2B2C, Compliance. We are about 13+ years of strong experience in web/mobile design and developing end-to-end custom solutions for various business practices for SMEs, Digital Agencies, & Startups like healthcare, CRM, ERP, HRM, Inventory Management. My technology of expertise are but not limited to:- ➜ FrontEnd JS Framework :- ReactJS, Gatsby, AngularJS, EmberJS, BackboneJS, VueJS, ModernizrJS ➜ Back-End JS Framework :- ExpressJS, SailsJS, MeteorJS, NodeJS ➜ Automating DevOps Tools:- Git, Jenkins, Maven, Puppet, CHEF, Docker, ELK Stack, Nagios ➜ PHP Framework:- Laravel, CodeIgniter, Zend 1, Zend 2, Yii ➜ E-Commerce:- Shopify, BigCommerce, WooCommerce, osCommerce, ➜ Databases :- MongoDB, MySQL, PostgreSQL ➜ Backend Development:- PHP, Core PHP, Curl, Web Services ➜ CMS Development:- WordPress, Theme Customization, Plugin Development, Joomla, Drupal ➜ Server Management:- WAMP, LAMP, Xampp, Nginx ➜ Agile Development:- Teamwork, Freedcamp, Trello, Jira, Asana, Basecamp. ➜ APIs:- Google, Facebook, Twitter, Google Maps, EAN, Youtube. ➜ Repository Management:- GIT, Bitbucket, SourceTree, and SVN. ➜ Front-End Development:- ReactJS, Sass/Less, Grunt, Gulp. ☬ My Vision:- To acquire lifetime steadfastness of my clients by reliably conveying the most astounding quality programming administrations, including Web, Mobile, Cloud, and IoT, which offer a phenomenal incentive to their business. Besides Healthcare, I have worked with custom software to automate complex procedures and processes, including scheduling, budgeting, CRM, and data mining tools. ➊ Rich experience in the financia, Insurance & healthcare domain, with particular expertise in Worker' Compensation & General Liability Insurance implementations. ➋ Medium to Large scale Insurance application developed for customers in states. ➌ Use of Recent Technology stacks to develop secure and robust applications. ➍ Have expertise with US Insurance systems and other regions as well. ➎ Documenting system for User Manual and effective training. Easy System upgrades. For the last few years, I’ve been experimenting with my job title, trying to find one that fits the kind of work I do regularly. Nothing has fit well or encompassed my full skill set and portfolio of work.
    vsuc_fltilesrefresh_TrophyIcon VOIP Software
    Gatsby.js
    Database Development
    AWS Lambda
    Flask
    PyTorch
    Data Access Layer
    MEAN Stack
    API Development
    Django
    RESTful Architecture
    TypeScript
    Python
    React
    Node.js
  • $150 hourly

    • 5.0/5
    • (11 jobs)
    Networking specialist whose qualifications include a certification in Helpdesk Management and Operations Management; and detailed knowledge of networking technologies and best practices. 22 years of experience in the creation and deployment of solutions protecting networks, systems and information assets for the Education sector as well as for diverse companies and organizations. Proficient in the following Systems/Technologies: Linux Based Systems (Ubuntu, Debian and CentOS); Windows Desktop (all), Asterisk VOIP Systems, Windows Server Operating Systems (2000-2019), Active Directory Administrator, VMWare Esxi 5.5 and 6, HyperV. Google Workspace Admin and Office 365 Admin, Sharepoint Admin. Experience with Blockchain technologies. LANs, WANs, VPNs, Routers, Firewalls, TCP/IP MS Office (Word, Excel, Outlook, Access, PowerPoint), MS Exchange (2000, 2003, 2007), Word Perfect Office, many others In my current role I work as a Tier 3 Escalations Engineer, NOC Engineer, Tier 3 VOIP Engineer, Data Center Engineer and Disaster Recovery Engineer. I look forward to discussing your specific technology project with you.
    vsuc_fltilesrefresh_TrophyIcon VOIP Software
    Blockchain
    Telecommunications Engineering
    FreePBX
    Microsoft SharePoint Administration
    Data Center Operations
    Mobile QA
    VMware ESX Server
    VMware Administration
    Network Administration
    Linux System Administration
    Windows Administration
    TCP/IP
    Asterisk
    Windows Server
    Microsoft Exchange Server
  • $35 hourly

    • 5.0/5
    • (37 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 VOIP Software
    Linux System Administration
    MySQL
    VICIDIAL
    PHP
    OpenSIPS
    Session Initiation Protocol
    FreePBX
    VoIP Administration
    FreeSWITCH
    Asterisk
  • $150 hourly

    • 4.9/5
    • (56 jobs)
    I am a solution-driven professional with over 10 years of experience consulting for CRM, ticketing, and phone systems. As a Business Systems Analyst, I assist my clients from the Discovery process (identifying business processes) through selection, implementation, and custom development of their software. Top CRM products I work with: Zoho CRM, Zoho Desk, Freshdesk, Freshsales, Zendesk Top phone and contact center systems I work with: RingCentral, Twilio, Talkdesk, Zoom, inContact, 8x8, DialPad and Nextiva Freshdesk development Zoho development RingCentral development TalkDesk development
    vsuc_fltilesrefresh_TrophyIcon VOIP Software
    System Configuration
    Business with 100-999 Employees
    VoIP Software
    Nextiva Business VoIP
    WebRTC
    SMS
    Chatbot Development
    VoIP Administration
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