VoIP Developers For Hire
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Hire engkarimismail
engkarimismail engkarimismail
$50 USD / hour
✅Senior Network & System Engineer | Security|VOIP✅Malaysia✅ About Me I am an experienced IT professional with expertise in server administration, networking, virtualization, and security. My skill set spans managing server operating systems, configuring directory services, implementing DNS/DHCP solutions, and deploying virtualization platforms. I have a strong background in...✅ About Me I am an experienced IT professional with expertise in server administration, networking, virtualization, and security. My skill set spans managing server operating systems, configuring directory services, implementing DNS/DHCP solutions, and deploying virtualization platforms. I have a strong background in firewalls, scripting, containerization, and database management. Additionally, I specialize in mail servers, backup systems, and cloud technologies. With advanced networking skills, including Cisco routing, VLAN management, VoIP/IP telephony, and penetration testing, I am well-equipped to handle complex IT infrastructures. I am dedicated to delivering reliable solutions, ensuring data integrity, and enhancing system performance. ✅Send me now 24/7 Availability Unlimited Revisions Fast Response ✅ Server Operating Systems Windows Server (2003 to 2024) | Ubuntu | CentOS | Debian | RHEL ✅ Directory Services Active Directory | OpenLDAP ✅ DNS and DHCP Windows Server DNS | DHCP | Linux DNS | DHCP ✅ Virtualization Microsoft Hyper-V | VMware ESXi | vCenter | Proxmox VE ✅ File Servers IIS FTP | proftpd | FileZilla | FTP Server | Samba ✅ Web Servers Apache | NGINX | Microsoft IIS ✅ Scripting and Automation PowerShell scripting | Bash scripting ✅ Containers Docker | Windows Subsystem for Linux (WSL) ✅ Backup Systems Veeam Backup | Iperius Backup | UrBackup ✅ Mail Servers Mailcow | Microsoft Exchange (2000–2019) | MailWizz | Postfix | EXIM ✅ Database Servers MySQL | PostgreSQL | MariaDB ✅ Firewalls and Security MikroTik | PFSense | Cisco Firewalls ✅ Networking Skills Cisco Routing and Switching | VLANS | OSPF | VoIP and IP Telephony | Network Penetration Testing Access Control Lists (ACLs) Security (MITM Attack Mitigation) ✅ Recovery Services Password recovery for accounts and routers | Disaster recovery planning ✅ VOIP Service Freepbx | freeswitch | CME | IP TELEPHONY | 3CX SYSTEMS ✅ Cloud Service AWS, DigitalOcean, Hetzner, Azure, Google Cloud Platform, IBM Cloud, Oracle Cloud, Alibaba Cloud, Contabo, Seva less -
Hire abusayed2004
abusayed2004 abusayed2004
$50 USD / hour
Ai Voice Agent, Asterisk PBX, SIP, Linux, SecurityBangladeshI am currently seeking long-term remote and on-site job opportunities. With 15 years of experience, I have worked extensively with VoIP, Asterisk, cloud technologies such as AWS and OpenStack, Server security, Vtiger CRM, Open VPN, CentOS, Ubuntu, Redhat, VoIPSwitch, Oracle DB, RHEVM, MySQL, and Linux customisation. I...I am currently seeking long-term remote and on-site job opportunities. With 15 years of experience, I have worked extensively with VoIP, Asterisk, cloud technologies such as AWS and OpenStack, Server security, Vtiger CRM, Open VPN, CentOS, Ubuntu, Redhat, VoIPSwitch, Oracle DB, RHEVM, MySQL, and Linux customisation. I am also proficient in Python and PHP scriptwriting for IVR and AGI implementation on Asterisk. I have a team for support and further development. My expertise includes: - Ai Voice Agent build and operations multi tenant platform. - Linux - Hosting Systems Administration & Monitoring - Kubernaties, IoT tech stack - Design and implementation of High-Performance SIP SBC - DevOps CI/CD - Service Optimisation - Security Hardening - VoIP, Asterisk, SMS, Dongle, and FreePBX installation, configuration, and maintenance - WebRTC SIP Phone - Infrastructure Planning - Disaster Recovery - Shell Scripting - Capacity planning, application delivery planning - Network Troubleshoot, Spanning Tree, PVST, RSTP, HSRP, RIP, BGP, EGRP, IGRP, MPLS - SAN Troubleshoot - GlusterFS, CEPH - NFS, SMB, ISCSI, SMTP - Linux performance tuning - MySQL, Oracle DB performance tuning - Laravel web application development - Web Security, Web benchmark, best practice - IPTV, Live streaming, VOD, FFmpeg - Raspberry Pi Please let me know if you have any questions or require further information. less -
Hire mascotindia123
mascotindia123 mascotindia123
$13 USD / hour
✅Expert: PHP, WP, eCom, Shopify, Laravel, CRM, ERPIndiaWe're having a multi-year experience in Custom Software and Mobile Application development and Dedicate Support and Maintenance of the Portals. ⭐⭐⭐⭐⭐ 5 Star Reviews, ⭕ Highly Skilled Team. ⭕ 14+ Years Experience in Web Development. ⭕ 1100+ Projects Completed Till Now And Keep Counting. ⭕ 99% Satisfied Customers And...We're having a multi-year experience in Custom Software and Mobile Application development and Dedicate Support and Maintenance of the Portals. ⭐⭐⭐⭐⭐ 5 Star Reviews, ⭕ Highly Skilled Team. ⭕ 14+ Years Experience in Web Development. ⭕ 1100+ Projects Completed Till Now And Keep Counting. ⭕ 99% Satisfied Customers And Keep Increasing. ⭕ 24x7- Dedicate Team for Support and Maintenance. ✔ SPECIALITIES - PHP - CodeIgniter - Laravel - Wordpress - Rise CRM - Node.Js - AWS - Woocommerce - Opencart - Prestashop - Shopify - Magento - Yii - Twilio - VOIP - SuiteCRM - Moodle - Azure Server API - Perfex CRM ✔ OUR EXPERTISE IN AREA ERP ◆ CRM ◆ CMS ◆ Twilio ◆ VOIP ◆ Courier & Logistics ◆ Warehousing ◆ E-Commerce ◆ Static / Dynamic Web Responsive Web Development ◆ Hybrid APP ◆ Payment Gateway Integration ◆ SuiteCRM ◆ Moodle ◆ Azure Server API ◆ Perfex CRM ◆ AWS ◆ less -
Hire krisk63
I am a seasoned full-stack software developer and AI Engineer with over 15 years of experience in crafting, developing, and managing sophisticated software projects. My passion for technology drives me to stay updated with the latest trends, allowing me to create innovative solutions tailored to meet diverse business...I am a seasoned full-stack software developer and AI Engineer with over 15 years of experience in crafting, developing, and managing sophisticated software projects. My passion for technology drives me to stay updated with the latest trends, allowing me to create innovative solutions tailored to meet diverse business needs. My extensive skill set enables me to build and maintain robust systems that meet the varied demands of businesses across different sectors. I specialise in developing AI-powered platforms that enhance user experience and automate complex processes. By leveraging machine learning algorithms and natural language processing, I create intelligent systems that provide actionable insights and drive efficiency across various applications. Core Skills and Technologies: - Web Technologies: JavaScript, TypeScript, React/Next.js, Vue, Angular, - Backend Frameworks: PHP (Laravel), Python (Django, Flask), Node.js - WebGL: Three.js, Babylon.js, PixiJS - Database: MongoDB, PostgreSQL, MySQL, Sqlite, - AI technology: OpenAI, Prompt Engineering, AI Agent, AI Chatbot, AI Text-to-Speech, AI Speech-to-Text I am dedicated to delivering high-quality solutions with a strong focus on innovation and efficiency. My commitment to excellence and collaborative approach ensures the success of every project I engage in. I would love to connect and discuss how we can work together. Best regards, Kris Kramer less -
Hire jkaranm
I specialize in outsourcing and digital marketing and am committed to improving your business's efficiency and effectiveness. While I can't please everyone, I have built a strong reputation in the industry. My services include data entry, Virtual Assistant, lead mining, email sending, article writing,...I specialize in outsourcing and digital marketing and am committed to improving your business's efficiency and effectiveness. While I can't please everyone, I have built a strong reputation in the industry. My services include data entry, Virtual Assistant, lead mining, email sending, article writing, proofreading/editing, telemarketing, designs, and more. As an experienced BPO professional (though my team and I cannot please everyone), I (and my team) have worked with numerous companies worldwide in areas such as lead generation, sales, customer service/support, data entry/processing, VA, and research. I offer many services, including telemarketing, customer service, graphics design, logo design, branding, technical support, data entry, and more. I was featured on Freelancer a few years ago (together with my small team) and have been a Preferred Freelancer here for more than a decade (but still stayed grounded and low profile). If my qualifications match your needs, please consider our small company for your next project. less -
Hire touhidecevw
touhidecevw touhidecevw
$60 USD / hour
Network & System Specialist|CCNP|Fortinet|RHCE|CEHBangladesh✅As a highly skilled and experienced network and system administrator with over 11 years of expertise, I hold notable certifications such as CCNP, CCNA, RHCE, and Certified Ethical Hacker (CEH) . I have established myself as an accomplished network, system, and security engineer, capable of delivering complete...✅As a highly skilled and experienced network and system administrator with over 11 years of expertise, I hold notable certifications such as CCNP, CCNA, RHCE, and Certified Ethical Hacker (CEH) . I have established myself as an accomplished network, system, and security engineer, capable of delivering complete solutions for designing, configuring, automating, and managing network and system projects. My proficiency in using simulation software such as Packet Tracer and GNS3, as well as real-life network and system devices, make me a valuable asset for any project. My few hands-on experiences is : ✅Network Design by MS Visio, Cisco packet tracer, GNS3, and EVE-NG ✅Netacad CCNA and CCNP packet tracer Labs activities, projects design and solution ✅Cisco routers, switches, FTD, FMC, and ASA firewalls. ✅WatchGuard, Palo Alto, CheckPoint Firewall, SonicWall, Fortigate, pfSense, OPNsense, Huawei firewalls. ✅Unifi Enterprise Fortress Gateway, Ubiquiti UDM Pro, Unifi Cloudkey, USG UniFi Firewall , Security Gateway, Switch, and AP devices ✅ Netgear, Huawei, Aruba switch, DrayTek router, TP-Link and others vendor wireless router configurations. ✅Cisco, Tp-Link, Aruba, Fortinet, Ubiquiti, Planet, Huwei switch configurations. ✅MikroTik Routers and switch configuration ✅ SNMP monitoring configuration: Observium, Librenms, Cacti, Nagios core ✅ Cloud Administrator: Azure, AMAZON AWS , Google GCP, OVH Cloud and Digital Ocean, Contabo ✅Hyper-V, VMware ESXi, VMware Workstation, VirtualBox, KVM, and Proxmox. ✅Ubuntu, Red Hat, CentOS, Debian, openSUSE, and Kali Linux distributions. ✅Windows server administration , Active Directory management, Exchange Server administration, DNS configuration ✅Servers: HP Proliant Servers, Dell/EMC Servers, IBM ✅VLSM/subnetting of small to large enterprises ✅VLANs, Inter-VLAN routing, VTP, CDP, Ether-Channel(LACP, PAGP) ✅DHCP, NAT/PAT configuration and IP helper address ✅static and Dynamic Routing protocols (RIP, OSPF, EIGRP, BGP) configuration ✅Layer-3 Redudent/backup links Using HSRP, VRRP ✅Port security, ACL( access list) configuration ✅Network troubleshooting and optimization ✅VPN Configuration Expert (GRE , SSL, IPSEC, PPTP, OpenVPN & DMVPN) ✅Network automation script for any Cisco and FortiGate devices using python ✅Overlay Networks VPN Expertise: Proficient in configuring and managing various overlay network VPNs, including ZeroTier, Tailscale, WireGuard, SoftEther VPN, Netbird , Netmaker, OpenVPN Cloud, I, Twingate and PeerVPN for secure, scalable, and decentralized networking, enabling seamless remote access, team collaboration, and encrypted communications across distributed systems. ✅Cisco Duo: MFA, 2FA, SSO, Identity Security Integration, Windows Logon, RDP, Microsoft AD, VPN Authentication. less -
Hire kuldeepvk
With 15+ years of experience in Web Hosting, Cloud Infrastructure, Email Marketing Systems, DevOps & Linux Server Administration, I help businesses run high-performance, secure and scalable environments. I’ve worked with all major cloud platforms including AWS, Google Cloud, Digital Ocean, and have successfully...With 15+ years of experience in Web Hosting, Cloud Infrastructure, Email Marketing Systems, DevOps & Linux Server Administration, I help businesses run high-performance, secure and scalable environments. I’ve worked with all major cloud platforms including AWS, Google Cloud, Digital Ocean, and have successfully delivered 850+ projects with excellent client satisfaction. 🌐 Core Services 🔸 Server & Cloud Management • Server Setup & Optimization (Linux, Ubuntu, CentOS, Alma Linux) • WHM/cPanel, Plesk, Webmin, CyberPanel • VPS / Dedicated / Cloud Server Management • Security Hardening & Firewall Setup (CSF, UFW) • HA-Proxy Load Balancing, Auto-Scaling • NGINX, Apache, PHP-FPM tuning • Backup, Disaster Recovery & Monitoring • SSL Installation, Fixing SSL/CURL Issues ________________________________________ 🔸 DevOps & Automation • Docker, Kubernetes, Ansible, Jenkins • CI/CD Pipelines • Cloud Infrastructure Automation • Git, GitHub Actions • Infrastructure Scaling & Optimization ________________________________________ 🔸 Video Streaming & Real-Time Platforms • BigBlueButton (BBB) Setup & Customization • Jitsi Meet • Red5, Wowza • Live Streaming Server setup (RTMP, HLS) ________________________________________ 🔸 Email Marketing Infrastructure • SMTP (Postfix, Send mail, PowerMTA) • DKIM, DMARC, SPF, rDNS Setup • MailWizz, Interspire, Acelle, Sendy, Mumara • Email Warmup, Inbox Optimization • SES, SendGrid, Mailgun Integration • Email Deliverability Fixes ________________________________________ 🔸 Windows & Office Services • Office 365 Setup & Administration • Windows Server Management • SSL Troubleshooting ________________________________________ 🔎 Digital Marketing Experience With 9+ years in Digital Marketing & SEO, I help clients increase online visibility using: • SEO (On-page, Technical, Off-page) • Google Ads Campaign Optimization • Website Audit & Traffic Growth Strategies Weekly and monthly performance reports are provided for full transparency. less -
Hire kingAsterisk
We've spent more than ten years digging deep into how dialers work, learning everything from connecting them smoothly with other programs to setting up complex servers and phone systems. This hands-on knowledge means your outgoing calls will be handled smoothly and dependably, every time. We prioritize clear and...We've spent more than ten years digging deep into how dialers work, learning everything from connecting them smoothly with other programs to setting up complex servers and phone systems. This hands-on knowledge means your outgoing calls will be handled smoothly and dependably, every time. We prioritize clear and consistent communication throughout the development process, keeping you informed at every stage. Furthermore, we are dedicated to exceeding expectations by consistently providing added value and going the extra mile. Beyond initial deployment, we offer comprehensive ongoing support to guarantee the long-term success of your dialer solution. Our commitment extends far beyond simply delivering a functional system. We're in it for the long haul, sticking with you until your unique business goals are completely met. That's why we don't consider our job done until your objectives are fully achieved, providing ongoing support and adjustments as needed to guarantee you reach your desired outcomes. Our extensive experience spans a wide range of dialer technologies, including: Vicidial A2Billing Voice Broadcasting IP PBX Solutions Avatar Dialer CRM Integrations IVR Systems Dialer Clustering Multi-Language Dialer Implementations Finding a truly reliable partner in the crowded freelance space can be a real challenge. We set ourselves apart by holding firm to the principles of high-quality work, consistently hitting project deadlines, and keeping the lines of communication wide open. Recognizing that your phone system is a critical tool for your business's success, we dedicate ourselves to crafting solutions that will genuinely push your company forward. Let's join forces and take your phone system to the next level, so you can achieve your business goals. less -
Hire Microlent
Namaste and welcome to Microlent Systems. We are a full time development agency that builds Web, Mobile, SaaS, Ecommerce and Automation solutions for startups and enterprises worldwide. Since 2008 we have delivered 375+ projects on Freelancer with a 4.9 star rating, Preferred Freelancer status, and Corporate...Namaste and welcome to Microlent Systems. We are a full time development agency that builds Web, Mobile, SaaS, Ecommerce and Automation solutions for startups and enterprises worldwide. Since 2008 we have delivered 375+ projects on Freelancer with a 4.9 star rating, Preferred Freelancer status, and Corporate verification. What we do • Custom Web Applications • Mobile Apps for Android and iOS • Ecommerce and Online Stores • SaaS Platforms and Portals • RPA and Process Automation Tech stack • Web: PHP, Laravel, ASP.NET Core, Node.js, Python • Mobile: Android, iOS, Flutter, React Native • Frontend: React, Vue, Next.js, HTML, CSS, JavaScript • Ecommerce: WooCommerce, Shopify, custom carts • Cloud and DevOps: AWS, Azure, Docker • Automation: RPA, API integration, workflow automation Why clients work with us • Clear communication and detailed documentation • Structured project management with milestones • Clean, scalable architecture and maintainable code • Long term support for enhancements and maintenance If you are planning a new product, improving an existing system, or need a reliable tech team for ongoing work, we would be happy to collaborate. Let us help you turn your idea into a stable, scalable digital product. less -
Hire Lazarone1
I’m an AI Agent Engineer, Automation Specialist, and Full-Stack Developer with a deep passion for embedding intelligence into real-world web and mobile products and eliminating manual business workflows through automation. My core focus is designing, building, and deploying AI-driven systems—from LLM-powered agents...I’m an AI Agent Engineer, Automation Specialist, and Full-Stack Developer with a deep passion for embedding intelligence into real-world web and mobile products and eliminating manual business workflows through automation. My core focus is designing, building, and deploying AI-driven systems—from LLM-powered agents and voice assistants to data-aware automation pipelines that integrate seamlessly with production applications. I work extensively with large language models (LLMs), retrieval-augmented generation (RAG), vector databases, embeddings, tool-calling frameworks, and agent orchestration patterns to create systems that reason, act, and scale reliably. On the backend, I build high-performance APIs and services using FastAPI, Flask, Node.js, and Django, with strong experience in async architectures, background workers, and event-driven systems. I regularly work with PostgreSQL, MySQL, Redis, MongoDB, and Neo4j, and design robust data layers using SQLAlchemy, Prisma, and ORM/DAO patterns. For AI workloads, I integrate OpenAI, Anthropic, Ollama, ElevenLabs, and custom inference pipelines, alongside Qdrant, Pinecone, FAISS, and hybrid search setups. On the frontend, I build modern, scalable interfaces using React, Next.js, Vite, Tailwind CSS, and TypeScript, with a strong emphasis on UX for AI-powered tools (real-time streaming, agent state visualization, conversation flows, and admin dashboards). For mobile, I work with React Native and cross-platform architectures to bring AI features directly into user-facing apps. Automation is a major part of my work. I design end-to-end business automation systems using Make.com, n8n, webhooks, cron jobs, message queues, and direct API integrations. This includes automating CRM workflows, email systems, call routing, lead qualification, reporting, and data synchronization across platforms like Twilio, Slack, Google Sheets, Stripe, Shopify, and internal tools. I’m highly experienced in AI voice agents and real-time systems, integrating Twilio, speech-to-text (STT), text-to-speech (TTS), streaming APIs, and conversational state management to build production-ready voice and chat agents. I also work on computer-vision and multimodal pipelines, combining vision models, tracking, and sensor data for advanced use cases. From an infrastructure and MLOps perspective, I deploy and scale systems using Docker, Linux servers, cloud VPS, CI/CD pipelines, and GPU-accelerated environments. I care deeply about observability, logging, error handling, security, and cost optimization in AI systems. Above all, I love turning business problems into automated, intelligent systems—reducing operational friction, increasing efficiency, and building products where AI is not a feature, but a core capability. If you need AI agents, automation pipelines, or full-stack systems that actually work in production, that’s exactly what I build. less
