Hire the Best OpenSIPS Specialists

Greetings, Are you in need of VOIP PBX setup and IP calls, SMS, and call center features for your business? I am Junaid, a certified Asterisk, a 3cx certified (beginner to advanced) Engineer. My job responsibilities include Installation and configuration of IP PBX on cloud platforms such as Vultr, AWS (Lightsail, ec2), Digitalocean, Azure, and on-site installation on local machines or virtual machines. I am an Asterisk certified, 3cx advanced certified engineer, FreePBX, and FusionPBX expert. My Graduation is in Telecom and have seven years of experience in IT, VOIP, and Server Administration. Skills (VOIP) - Install, Configure, and set VOIP Pbx on Linux and Windows operating systems. - Configure custom domain and DNS setup with SSL configuration or Let's encrypt. - PBX Configuration includes extensions creation, Ring Groupes, IVR (Digital Receptionist) Call Queues, Time Conditions, Inbound and Outbound routes setup, and Voicemail. - SIP Trunk configuration for external inbound and outbound calls. The SIP setting also includes the network configuration and port (SIP 5060) setup. - Network and Firewall setup for smooth call routing on UDP and TCP protocols. - IP Phones ( Yealink, Fanvil, or Grandstream phones) and softphones (Xlite, Microsip, 3cx, Zoiper) configurations and provisioning with the PBX server. - Integration of third-party software like open source CRM (Vtiger, Zoho, Oddo), Billing software (ASTPP, A2billing). - Voice codecs and Transcoding setup. - Call flow app designing. - Troubleshoot the errors and issues in configuring the PBX. - Provide ongoing support and troubleshoot the issues on remote Anydesk or Zoom. VICIDIAL : Inbound and outbound campaign configuration. Predictive dialing campaigns, Preview dialing campaigns, and soundboard setup. Installation and configuration of cluster setup containing database server, web server and telephony server. IVR setup in ViciDial AI Voicebot We can use Asterisk to build your AI Agent that will handle the custom call flow and handle tasks. Integration of Microsoft Azure Speech to Text, Text to Speech and OpenAI with Asterisk/Freepbx Linux and IT Skills I am a certified RHEL administrator working on web server installation and configuration on Apache and Nginx, file system, installation, ownership, and permission, partitions, Archive compression tools and Rsync, Fdisk partitioning cases, Process and daemons, and performance monitoring. My job responsibilities as Linux admin include: - Installing VOIP PBX servers or Application servers on Apache and Nginx. - Configure Nginx as a Reverse proxy server. -Taking Backup of the Pbx and restoring on the new server. - Cron job scheduling in Linux for monthly and weekly backup, auto-renewal, and auto-recording deletion - Basic and advanced file system management and swap files. - Cisco certified network administrator, having work experience on Cisco switches, routers, and bridges. - Basic skills include Windows servers 2012, 2016, and desktop Windows 10, 8, and 7. - DNS and IP aliasing. - RPM Install, upgrade, and erase packages in Linux. - Performance monitoring using tools like Top, find, and FSH. - Database Administration. VOIP Servers mainly use Mysql, MariaDB, and Postgresql. Services - AWS Cloud Computing. Managing ec2 and Lightsail instances. - Aws S3 bucket configuration. Integrate S3 with external application servers. - ServerClient model NFS server - VSFTP Services - Samba Server - DNS server - Mail Server - Proxy server

I am a skilled VoIP/Asterisk engineer with over 10 years of experience in designing, deploying, and managing SIP-based systems across a wide range of platforms, including Asterisk, Vicidial, FreePBX, RingCentral, 3CX, GoAutoDial, and more. My expertise also extends to WebRTC integration, managing dialer campaigns, and leveraging AI-driven solutions for enhanced call center operations. Key highlights of my experience include: Leading the implementation of SIP and VoIP solutions across multiple platforms, including complex WebRTC integrations for browser-based calling. Managing and optimizing inbound call center operations, ensuring high uptime and call quality. Customizing and fine-tuning dialer campaigns to improve performance and efficiency. Integrating AI-driven technologies, such as voice transcription and sentiment analysis, to enhance customer interactions and streamline workflows. Troubleshooting and resolving complex VoIP issues related to call routing, quality, and security. Collaborating with cross-functional teams to ensure seamless integration of VoIP systems and applications. Staying up-to-date with the latest advancements in VoIP, AI, and call center technology to optimize system performance and security. With my diverse experience and strong technical skills, I am confident that I can contribute significantly to your team and drive the success of your VoIP and call center operations.

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.

Principal Full-Stack Platform Architect | Telecom, AI Voice, SaaS & Cloud I help startups, telecom providers, BPOs, enterprises, and SaaS companies design, build, deploy, and scale production-ready software platforms. With 20+ years of engineering experience and 90+ successful Upwork projects, I take complete ownership of the engineering lifecycle from solution architecture and UI/UX implementation to backend services, APIs, AI integration, telecom infrastructure, DevOps, cloud deployment, documentation, and long-term production support. Unlike specialists who only focus on one layer of the stack, I build complete business platforms that are scalable, maintainable, secure, and production ready. Whether you need a communication platform, AI Voice Agent, SaaS application, customer portal, enterprise dashboard, workflow automation, or cloud-native backend, I can architect and deliver the complete solution. What I Build Enterprise SaaS Platforms I design and develop complete SaaS products including: Multi-tenant SaaS applications Customer portals Admin dashboards CRM & ERP platforms Contact Center (CCaaS) Hosted PBX & UCaaS Workflow automation platforms AI-powered business applications Internal enterprise systems From MVP to enterprise-scale production deployments. Full-Stack Software Development I provide complete product engineering across frontend, backend, APIs, databases, cloud infrastructure, and production deployment. Frontend: React Next.js Vue.js TypeScript Tailwind CSS Material UI Responsive Web Applications Progressive Web Apps (PWA) Mobile-first UI Backend: Node.js NestJS Python FastAPI Django Laravel Go PHP Database PostgreSQL MongoDB MySQL Redis API Development REST APIs GraphQL WebSockets OpenAPI / Swagger OAuth JWT MCP Servers Webhooks Third-party integrations AI Engineering & Intelligent Automation I help businesses integrate AI into production systems—not just prototypes. I build: AI Voice Agents AI Receptionists AI Customer Support AI IVR Systems RAG Applications Agentic AI Systems Knowledge Assistants Internal AI Platforms AI Workflow Automation AI Document Processing AI Search Platforms AI Technologies OpenAI Claude Gemini Deepgram ElevenLabs LiveKit LangChain LangGraph MCP Prompt Engineering Model Optimization Vector Databases Realtime Voice APIs Telecom & Communication Platforms Telecom remains one of my strongest engineering specialties. I build complete communication platforms not just PBX installations. Technologies FreeSWITCH Asterisk FusionPBX FreePBX VICIdial SIP RTP WebRTC SIP.js ESL AGI AMI ARI Services Multi-tenant PBX Hosted PBX Contact Center (CCaaS) UCaaS AI Voice Platforms Softphones Predictive Dialers Progressive Dialers Call Recording Call Analytics IVR Development Queue Management DID Provisioning Carrier Integration SBC Integration Telecom Billing White-label Telecom Platforms Cloud Infrastructure & DevOps I deploy highly available production environments. Infrastructure Linux Docker Kubernetes Terraform Nginx HAProxy AWS Azure Google Cloud DevOps CI/CD Pipelines GitHub Actions GitLab CI Containerization Monitoring Logging Auto Scaling Production Deployment Release Management Monitoring Prometheus Grafana Loki Alerting Health Checks Performance Optimization Architecture & Technical Leadership I frequently work as a technical lead and solution architect. Services include: Solution Architecture Software Architecture System Design Database Design API Architecture Microservices Event-driven Architecture Multi-tenant Architecture High Availability Disaster Recovery Security Architecture Performance Optimization Documentation & Project Delivery Beyond engineering, I help clients organize and successfully deliver projects. I prepare: Software Architecture Documents Technical Design Documents API Documentation Swagger / OpenAPI Specifications Statements of Work (SOW) Functional Specifications BRD PRD Deployment Guides Infrastructure Documentation QA Plans Technical Proposals Project Estimates Delivery Roadmaps I also work comfortably with: Jira ClickUp Trello Azure DevOps GitHub Projects Linear Confluence Notion Recent Projects Enterprise Multi-tenant CCaaS Platform AI Voice Agent using OpenAI Realtime API Telecom ERP Platform Hosted PBX Platform FusionPBX Custom Development FreeSWITCH Call Routing Engine Enterprise AI Knowledge Platform AI Workflow Automation CRM Integrations Telecom Billing Platform WebRTC Calling Platform Call Center Analytics Dashboard Healthcare Communication Platform Law Firm AI Automation Customer Support Automation Platform Why Clients Hire Me ✔ 20+ years of software engineering experience ✔ 90+ successful Upwork projects ✔ End-to-end ownership from architecture to production ✔ Full-stack development across frontend, backend, APIs, databases, AI, and cloud infrastructure ✔ Deep expertise in FreeSWITCH, Asterisk, FusionPBX, SIP, WebRTC, CCaaS, and UCaaS ✔ Production AI engineering using OpenAI, Claude, Gemini, LangChain, Lang

Senior VoIP Engineer with deep expertise in FreeSWITCH, Asterisk, Kamailio, OpenSER, Anynode SBC, and AudioCodes. Skilled in designing, implementing, and integrating Voice AI Agent solutions within telephony systems, leveraging platforms such as VAPI, LiveKit, and Pipetcat to enable intelligent, real-time voice interactions.

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