I am a VoIP and Telephony Engineer with extensive experience in 3CX, VICIdial, Asterisk, FreeSWITCH, Twilio, SIP Trunking, and DID number provisioning. I help businesses build, optimize, and maintain reliable communication systems for call centers, telemarketing operations, and enterprise telephony environments.
My expertise includes PBX installation and configuration, SIP trunk integration, number porting, IVR design, call routing, predictive dialer setup, inbound and outbound call center solutions, and VoIP troubleshooting. I am also experienced with Linux server administration, cloud deployments, and API integrations for voice and SMS applications.
Whether you need a complete call center deployment, 3CX configuration, VICIdial optimization, Twilio integration, SIP troubleshooting, or ongoing telephony support, I can deliver scalable and dependable solutions tailored to your business needs.
Core Skills:
• 3CX PBX Administration
• VICIdial Installation & Management
• Asterisk & FreeSWITCH Development
• Twilio Voice & SMS Solutions
• SIP Trunk Configuration
• DID Number Provisioning & Porting
• Predictive & Power Dialers
• IVR & Call Flow Design
• Linux Server Administration
• VoIP Troubleshooting & Optimization
• CRM & API Integrations
• Call Center Infrastructure Setup
I focus on delivering reliable communication systems that improve efficiency, call quality, and business performance.
3CX, VICIdial, Asterisk, FreeSWITCH, Twilio, VoIP, SIP, SIP Trunk, DID Numbers, PBX, IP PBX, Hosted PBX, Cloud PBX, Telephony, Telecom, Telecommunications, Call Center, Contact Center, Predictive Dialer, Power Dialer, Auto Dialer, Progressive Dialer, Call Routing, IVR, Interactive Voice Response, Call Queue, Ring Groups, Voicemail, Call Recording, Number Porting, SIP Carrier, Voice Gateway, Session Border Controller, SBC, WebRTC, SMS Gateway, Twilio Voice, Twilio SMS, Twilio API, Linux Administration, CentOS, Ubuntu, Debian, Rocky Linux, AlmaLinux, MySQL, MariaDB, PostgreSQL, Apache, Nginx, SSH, VPN, Firewall, Networking, TCP/IP, UDP, RTP, QoS, NAT Configuration, VoIP Troubleshooting, SIP Debugging, SIP Trace, Wireshark, CRM Integration, Salesforce Integration, HubSpot Integration, Zoho CRM, Pipedrive, API Integration, REST API, PHP, Python, Bash Scripting, AGI Scripts, Call Flow Design, Inbound Calling, Outbound Calling, Lead Management, Telemarketing, Cold Calling Systems, Voice Broadcasting, Bulk SMS, DID Provisioning, SIP Registration, Carrier Integration, Call Monitoring, Queue Management, Agent Management, Multi Tenant PBX, Failover Configuration, High Availability, Cloud Deployment, AWS, DigitalOcean, Vultr, Linode, Dedicated Servers, VPS Setup, Server Migration, System Optimization, VoIP Security, Fraud Prevention, FreePBX, Issabel PBX, FusionPBX, Elastix, Yeastar, Grandstream, Fanvil, Yealink, Polycom, Cisco VoIP, Sangoma, OpenSIPS, Kamailio, Voice API, Telecom Consulting, Call Center Setup, VoIP Engineer, Telephony Engineer, SIP Expert, 3CX Expert, VICIdial Expert, Twilio Expert, Asterisk Expert, FreeSWITCH Expert, Linux Server Administrator, Network Engineer, Technical Support, System Administration, Remote Support, Cloud Communications, Unified Communications, UCaaS, Business Phone System, Enterprise Telephony, Call Center Optimization, Dialer Configuration, Lead Campaign Management, Real Time Reporting, Call Analytics, Voice Solutions, Telecom Infrastructure, Contact Center Solutions, VoIP Deployment, PBX Installation, SIP Configuration, DID Management, Call Center Technology, Telecom Solutions
VICIDIAL
Telemarketing
Lead Generation
Sales Lead Lists
Asterisk
3CX
BPO Call Center
VoIP Software
VoIP Administration
VoIP PBX
VoIP
Twilio
Twilio API
FreePBX
Cold Calling
Nimit P.
Ahmedabad, India
$20/hr
4.8
26 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:
- Development of Linphone Mobile VoIP Diallers
- Development of PJSIP Mobile VoIP Diallers
- Installation, development, customization, and maintenance of Asterisk,FreeSwitch Switch,Kamalio and OpenSIPs Servers
- Android app development
- iOS app development
- Flutter Cross Platform App Development
- Electron App Development
- Web application development
- ReactJS and ReactNative development for web and mobile applications
- Testing and bug fixing for existing applications
Consulting for ongoing projects
Project consulting for Android, iOS, ReactJS, Asterisk, FreeSwitch, OpenSIPs, Kamailio, ASTPP, RTPengine, MediaProxy, RTPproxy, FreePBX, and A2Billing
Expertise in developing Flutter WebRTC applications
Expertise in developing ReactNative WebRTC applications
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
VICIDIAL
PHP
WordPress
FreeSWITCH
VoIP Administration
Asterisk
Session Initiation Protocol
VoIP
FreePBX
iOS Development
VoIP Software
Android App Development
iOS
WebRTC
Call Center Management
Uday K.
Ahmedabad, India
$60/hr
4.8
37 jobs
Support and development on asterisk, vicidial, goautodial, fusionpbx, freeswitch
Linux System Administration ( CentOS, Debian, Ubunut)
Database Management (Mysql, PostgreSQL)
Network Administration (Router, Switch, Hardware Firewall)
VICIDIAL
Session Initiation Protocol
Mobile App
Customer Relationship Management
Asterisk
FreeSWITCH
iOS
A2Billing
Android
Network Administration
FreePBX
MySQL
PHP
Linux System Administration
VoIP
Edgardo C.
Davao, Philippines
$15/hr
4.7
31 jobs
✅ Overview
I’m a VoIP Administrator with over 10 years of experience managing and optimizing phone systems for businesses of all sizes. I specialize in RingCentral, Dialpad, 8x8, Google Voice, GoTo, and other VoIP platforms — helping companies streamline communication, improve call quality, and ensure reliable call routing.
From IVR setup and number porting to call queue management and CRM integration, I deliver solutions that keep phone systems running smoothly for both staff and customers.
💼 Services I Provide
Phone System Setup & Administration - RingCentral, Dialpad, 8x8, Google Voice, GoTo, Nice inContact, Grandstream, RingCX
IVR (Auto-Attendant) Design & Implementation - Custom menus, business/after-hours routing, multilingual prompts
Call Queue & Routing Optimization - Overflow handling, priority routing, and fallback options
Number Porting & Account Migration - Hassle-free transfer of business numbers across platforms
User Onboarding & Training - Account creation, extension assignments, and permissions
Troubleshooting & Support - Call quality issues, dropped calls, one-way audio, faxing problems
Compliance Setup - SMS/TCR registration & HIPAA-compliant call handling
CRM & Third-Party Integrations - Salesforce, Zapier, Podium, Beetexting
📊 Sample Projects
🔹 Healthcare Practice – RingCentral IVR & Call Queue
Built a multi-level IVR for scheduling, billing, and nurse line.
Added after-hours routing with voicemail to HIPAA-compliant inbox.
Reduced missed calls by 40% within the first month.
🔹 Multi-Location Business – Dialpad Migration
Migrated 50+ users fromDialpad to RingCentral.
Configured shared call queues and AI-powered call transcription.
Delivered staff training and SOP documentation.
🔹 SMS Compliance for Retail Client
Completed 10DLC campaign registration for SMS.
Updated client website to meet carrier requirements.
Enabled mass texting via Beetexting integrated with RingCentral.
🛠️ Tools & Platforms
VoIP Systems: RingCentral | Dialpad | 8x8 | Google Voice | GoTo | Nice inContact | RingCX
Integrations: Salesforce | Zapier | Zendeskl
Collaboration: Microsoft Teams | Google Workspace
📌 Why Clients Hire Me
✔ 10+ years of proven VoIP expertise
✔ Fast, reliable setup & troubleshooting
✔ Clear documentation & training for staff
✔ Track record of reducing missed calls and improving customer experience
📞 Let’s Work Together
If you need a VoIP expert to set up, optimize, or troubleshoot your phone system, let’s connect. I’ll ensure your communications are seamless, reliable, and built to support your business growth.
VoIP
Network Monitoring
Network Administration
Computer Operating System
VoIP Administration
Electrical Engineering
Computer
Data Analytics
Computer Skills
Technical Support
VoIP Software
RingCentral Glip
Dialpad
GoToConnect
Call Center Management
Oltion N.
Tirana, Albania
$40/hr
5.0
51 jobs
Expert Network Engineer & System Administrator | MikroTik Certified
Summary:
With a proven track record in network engineering and system administration, I offer a comprehensive skill set and a commitment to delivering excellence. As a certified MikroTik Network Associate, I specialize in designing, implementing, and optimizing networks for optimal performance and security. My expertise spans dynamic routing, network security, VPN setup, load balancing, and more, making me a reliable partner for your infrastructure needs.
Key Skills:
- Dynamic Routing & Optimization: Proficient in OSPF and BGP protocols, ensuring efficient traffic management and network scalability.
- Robust Network Security: Implementing robust firewalls, intrusion detection systems, and encryption protocols to safeguard against cyber threats.
- Advanced VPN Solutions: Configuring secure VPN tunnels for remote access and interconnecting geographically dispersed networks.
- Load Balancing & Failover: Designing resilient architectures with load balancing and failover mechanisms to ensure high availability.
- Quality of Service (QoS): Prioritizing network traffic for critical applications and services to maintain optimal performance.
- Captive Portal Setup: Deploying captive portals for seamless guest authentication and access control in wireless networks.
- DNS & Email Server Setup: Setting up and managing DNS servers and email servers for reliable communication infrastructure.
- RADIUS Authentication: Configuring RADIUS servers for centralized authentication, authorization, and accounting.
- Wireless Network Expertise: Designing and optimizing wireless networks, including long-range point-to-point links for seamless connectivity.
- Monitoring & Management Tools: Proficient in utilizing Zabbix and other monitoring tools for proactive network management and troubleshooting.
- VoIP Technologies: Experience with Asterisk and Vicidial for deploying VoIP solutions tailored to business needs.
Additional Skills:
- Programming Proficiency: Skilled in back-end languages such as Python and Bash scripting for automation and customization.
- Web Hosting & Development: Experienced in web hosting management and front-end development to complement network infrastructure.
Certifications:
MikroTik Certified Network Associate (MTCNA), MikroTik Certified Routing Engineer (MTCRE)
About Me:
Driven by a passion for technology and a commitment to excellence, I thrive in dynamic environments where I can leverage my skills to solve complex challenges and drive business success. With a keen eye for detail and a proactive approach to problem-solving, I ensure that network infrastructures not only meet current needs but are also scalable and adaptable to future requirements.
VICIDIAL
VPN
Wireless Network Implementation
Network Engineering
Asterisk
MySQL
Microsoft SQL Server
Computer Network
Mikrotik RouterBOARD
MikroTik RouterOS
Network Design
MikroTik
Gaurav L.
Bhopal, India
$24/hr
4.7
217 jobs
I help businesses build reliable, scalable communication systems and web applications by combining deep expertise in VoIP (3CX & Yeastar) with full-stack development and API integrations.
With 6+ years of experience in 3CX, hands-on expertise in Yeastar Cloud PBX, and 3+ years in full-stack development, I specialize in delivering end-to-end solutions — from telephony infrastructure to CRM integrations and custom dashboards.
🔥 What I Can Do For You
☎️ VoIP & PBX Solutions (3CX + Yeastar)
3CX setup, configuration & troubleshooting (V18/V20)
Yeastar Cloud PBX deployment & management
SIP Trunk integration (Twilio, Telnyx, Flowroute, etc.)
IVR, Call Queues, Ring Groups, Call Routing
Predictive / Progressive Dialer setup
Call recording, reporting & analytics
Multi-tenant PBX architecture
DID management & call flow optimization
💻 Full Stack Development
Backend: PHP, Node.js, Golang
Frontend: JavaScript, HTML, CSS, Bootstrap, Tailwind
Database: MySQL, PostgreSQL
Build scalable CRM systems & dashboards
WebRTC / SIP dialer development
Real-time systems & automation workflows
🔗 API Development & Integrations (Swagger/OpenAPI)
REST API design & development
Swagger/OpenAPI documentation
CRM integrations (Zoho, Salesforce, Monday, etc.)
Webhooks, automation, and data sync systems
🌐 WordPress Development
Custom theme & plugin development
Website optimization & speed improvements
API integrations with WordPress
Business websites & landing pages
💡 Why Clients Choose Me
✔ 6+ years in VoIP & telephony systems
✔ Strong backend + infrastructure understanding
✔ Fast troubleshooting & problem-solving
✔ Clean, scalable, production-ready solutions
✔ Excellent communication & long-term support
📌 Recent Work Highlights
Built multi-company 3CX dialer system with CRM integration
Deployed Yeastar Cloud PBX for international clients
Developed VoIP analytics dashboards & call tracking systems
Integrated Twilio / Telnyx with custom applications
Created API-driven automation workflows using webhooks
🎯 Let’s Work Together
If you need help with:
Setting up or fixing your 3CX / Yeastar PBX
Building a custom dialer or VoIP system
Integrating APIs or CRM systems
Developing a scalable web application
👉 Send me a message — I’ll provide a clear solution quickly.
PHP
Python
JavaScript
Telecommunications
Full-Stack Development
VoIP PBX
Call Center Management
3CX
System Administration
API Integration
HubSpot
API Development
API
Pipedrive
WordPress
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At A Glance: VICIdial
The Internet and the advent of social media in recent years has taken center stage, with chat rooms and emails supplementing the tried-and-tested role of the telephone. Nevertheless, phone services for a company still remain a vital and relevant, if not overlooked, tool that can be implemented even more effectively as communications technology increases. Phone services and call centers encompass direct phone marketing and voice tech support; they can even act as internal phone systems for a company or group that has no centralized physical office or work space. VICIdial is an online software suite that can be set up and managed as a fully functional inbound/outbound call center without the requirement of a centralized physical call center. VICIdial specialists are dynamic professionals with experience working with the VICIdial suite and the elements it is made up of.
VICIdial specialists have expert and intimate knowledge of the system, which is an open source project that interacts with the PBX phone system through scripts written in PERL and PHP. This experience and knowledge means that not only are VICIdial specialists capable and experienced call center managers, but they oftentimes possess adequate coding skills that allow them to customize the VICIdial system to meet your specific needs. Hiring a freelance VICIdial specialist gives you access to a highly customizable software platform that can be turned into the ideal phone system solution for your business as well as a flexible and powerful ally to navigate new technologies involved in modern phone system solutions.