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👋 Hi, I'm Hepshiba Beula, a Networking Engineer with 4+ years of experience specializing in Optical Networks (ONTs & OLTs), VoIP, PBX, Asterisk, Wi-Fi module development, and Network Administration. I have hands-on expertise in embedded systems, networking protocols, and firmware development for high-performance telecommunications solutions. Key Expertise: ✅ ONTs Development & Support – Data flow monitoring, VoIP support, OMCI stack enhancements ✅ Wi-Fi Module Engineering – Performance optimization, debugging, and system enhancements ✅ VoIP Network Enhancements – SIP signaling, VoIP debugging (Asterisk, Wireshark), FXS device integration, FreePBX deployment ✅ Network Administration – VLANs, switch-based configurations, traffic monitoring (Ixia, Spirent) ✅ Embedded Software Development – C programming, Data Structures, Linux-based development ✅ Packet Analysis & Debugging – Deep packet inspection, protocol debugging (Wireshark, Asterisk) ✅ OLT Support – Ensuring seamless integration and maintenance of Optical Line Terminals Professional Experience Highlights: 🔹 Optical Networks (ONT Development & OLT Support) Developed OMCI stack interfaces for ONTs, enabling seamless network provisioning. Worked on PON activation, MIB Upload, and software upgrades for Adtran ONTs. Designed and implemented CFM Protocol on Cortina-based targets. Monitored data flow and ensured VoIP support for ONTs in live network environments. 🔹 Wi-Fi Module Enhancement & Debugging Enhanced and maintained the BGW320 Wi-Fi module for AT&T residential gateways. Debugged and optimized Wi-Fi performance, including network stability and traffic flow. 🔹 VoIP & Network Optimization Implemented VoIP handling in FXS devices (Cortina 6xx, BRCM 8xx, 62x). Debugged VoIP packets using Asterisk, Wireshark, ensuring high call quality. Managed SIP signaling and VoIP enhancements for network efficiency. Has experience in deploying FreePBx on cloud server and configuration of trunk and SIP routing and extension 🔹 Network Configuration & Traffic Analysis Monitored and optimized network traffic using Ixia, Spirent for data packet analysis. Configured VLANs, switches, and network routing for optimal data flow. Tech Stack & Tools: 💻 Languages: C, Python, Shell Scripting 🛠 Tools: Git, JIRA, Bitbucket, Confluence, Perforce, Wireshark, Asterisk, IXIA, Spirent 📡 Platforms: Linux/Unix, Residential Gateways, Optical Line Terminals (OLTs), Optical Network Terminals (ONTs) I am open to networking, IT infrastructure, and embedded systems roles, bringing strong problem-solving skills and expertise in network administration, VoIP, and optical networking solutions. Let’s connect and collaborate! 🚀

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)

Senior VoIP & Telephony Engineer with 8+ years of hands-on experience building, deploying, and supporting Asterisk-based communication systems for enterprise and call centre clients worldwide. I specialise in: - Asterisk, FreePBX, Vicidial, GoAutoDial, Elastix, ISSABEL PBX — installation, configuration, custom dialplans - SIP trunking and carrier integration, PRI, GSM gateways - Custom IVR design and voice broadcasting systems - Predictive/power dialer setup and campaign optimization for outbound call centers - CRM integration (VTiger, custom PHP/MySQL platforms) with telephony systems - Voice and SMS API integration for unified communication workflows - Multi-cloud deployment and server administration (AWS, DigitalOcean, OVH, Vultr) on Linux (CentOS, Red Hat, Ubuntu) - System troubleshooting, uptime optimization, Currently a Senior Software Engineer at Sinch India, where I design and maintain scalable Asterisk and SIP solutions and cloud telephony infrastructure for enterprise-grade voice and SMS traffic. Previously built high-volume inbound and outbound call systems, predictive dialers, and custom IVRs at FirstCry (BrainBees Solutions Pvt. Ltd.) and other call center operations, supporting nationwide and multi-site campaigns. Whether you need a new Asterisk or Vicidial system architected from scratch, an existing PBX fixed or optimized, a custom IVR or dialer campaign built, or ongoing production support, I bring reliable, high-uptime solutions and clear communication throughout the project. Let's discuss your requirements. I respond quickly and am comfortable working across time zones.

I design, code and build production-ready SaaS, Full-Stack, VoIP, CPaaS, UCaaS, Contact Center, SIP/RTP/WebRTC, AI Voice and CRM platforms. 20+ years across software engineering, architecture and delivery, with 90+ successful Upwork projects. Need one technical partner who can own the solution from architecture to production? I work across frontend, backend, APIs, databases, real-time communications, AI integrations, cloud and DevOps. 𝗪𝗛𝗔𝗧 𝗜 𝗕𝗨𝗜𝗟𝗗 • Multi-tenant SaaS, CRM/ERP, admin portals, customer portals and enterprise applications • CPaaS, UCaaS, CCaaS, hosted/multi-tenant PBX and telecom platforms • Predictive, progressive, power and automated dialers • IVR, call queues, routing, recording, transcription, call analytics and agent management • AI Voice Agents, AI receptionists, conversational AI and real-time voice systems • WebRTC softphones, browser calling, SIP clients and real-time communication • REST/GraphQL APIs, WebSockets, webhooks and third-party integrations • CRM, ERP, payment, telecom carrier, DID, SMS and enterprise system integrations • E-commerce, Magento/headless commerce, mobile commerce and PWAs • MVP, platform modernization, feature development and enterprise-scale systems 𝗧𝗘𝗟𝗘𝗖𝗢𝗠 & 𝗥𝗘𝗔𝗟-𝗧𝗜𝗠𝗘 FreeSWITCH, Asterisk, FusionPBX, FreePBX, VICIDIAL, SIP, RTP, WebRTC, SIP.js, ESL, AGI, AMI, ARI, IVR, DID, DNC, SIP trunking, carrier integration, SBC, telecom billing, call recording, queues, dialers and voice broadcasting. 𝗔𝗜 𝗩𝗢𝗜𝗖𝗘 & 𝗔𝗚𝗘𝗡𝗧𝗜𝗖 𝗔𝗜 OpenAI, Claude, Gemini, OpenAI Realtime API, Deepgram, ElevenLabs, LiveKit, LangChain, LangGraph, MCP, RAG, vector databases, AI agents, knowledge assistants, AI customer support, call automation and CRM-integrated AI workflows. 𝗙𝗨𝗟𝗟-𝗦𝗧𝗔𝗖𝗞 Frontend: React, Next.js, Vue.js, Angular, JavaScript, TypeScript, Tailwind CSS, Material UI, PWA Backend: Node.js, NestJS, Python, FastAPI, Django, Laravel, PHP, Go Mobile: React Native, Flutter, Ionic, Android, iOS APIs: REST, GraphQL, WebSockets, OpenAPI, Swagger, OAuth, JWT, Webhooks, MCP Data: PostgreSQL, MySQL, MongoDB, Redis VOIP/Server: Vicidial, FreePBX, FusionPBX, Issabel UcaaS, Linux, Docker/K8, AWS/GCP/Azure/VPS, FreeSWITCH, Asterisk 𝗖𝗟𝗢𝗨𝗗, 𝗗𝗘𝗩𝗢𝗣𝗦 & 𝗣𝗥𝗢𝗗𝗨𝗖𝗧𝗜𝗢𝗡 Linux, Docker, Kubernetes, Terraform, AWS, Azure, Google Cloud, Nginx, HAProxy, CI/CD, GitHub Actions, GitLab CI, monitoring, logging, Prometheus, Grafana, Loki, auto-scaling, high availability and production deployment. 𝗘-𝗖𝗢𝗠𝗠𝗘𝗥𝗖𝗘 & 𝗘𝗡𝗧𝗘𝗥𝗣𝗥𝗜𝗦𝗘 𝗜𝗡𝗧𝗘𝗚𝗥𝗔𝗧𝗜𝗢𝗡 Magento 2, GraphQL, Headless Commerce, PWA Commerce, OMS, SAP, Navision, Unicommerce, Flute Commerce, Razorpay and custom enterprise integrations. Experience includes QSR, retail, insurance, banking, airline, real estate and environmental platforms. 𝗔𝗥𝗖𝗛𝗜𝗧𝗘𝗖𝗧𝗨𝗥𝗘 • Solution/software architecture and system design • Database, API and integration architecture • Microservices and event-driven architecture • Multi-tenant and white-label SaaS architecture • Real-time communication architecture • Cloud architecture and containerization • Security, scalability and performance optimization • High availability and disaster recovery 𝗧𝗥𝗢𝗨𝗕𝗟𝗘𝗦𝗛𝗢𝗢𝗧𝗜𝗡𝗚 & 𝗠𝗢𝗗𝗘𝗥𝗡𝗜𝗭𝗔𝗧𝗜𝗢𝗡 I can analyze existing systems, identify architectural bottlenecks, troubleshoot VoIP/SIP issues, optimize APIs and databases, modernize legacy applications, improve scalability, integrate new services and take existing products toward production readiness. 𝗦𝗘𝗟𝗘𝗖𝗧𝗘𝗗 𝗦𝗬𝗦𝗧𝗘𝗠𝗦 Enterprise CCaaS | AI Voice Agents | UCaaS | CPaaS | Telecom ERP | Hosted PBX | Multi-Tenant PBX | FreeSWITCH/Asterisk | VICIDIAL | Predictive Dialers | WebRTC Calling | Telecom Billing | CRM | AI Knowledge Platforms | Magento Headless Commerce | OMS/SAP Integration | Workflow Automation | Call Analytics 𝗪𝗛𝗬 𝗖𝗟𝗜𝗘𝗡𝗧𝗦 𝗛𝗜𝗥𝗘 𝗠𝗘 ✓ Architecture + hands-on development ✓ End-to-end ownership from discovery to production ✓ Full-Stack + SaaS + AI + VoIP + Cloud/DevOps ✓ Strong telecom and real-time communication experience ✓ Production-focused, scalable and maintainable engineering ✓ Able to work with an existing codebase or build from zero If your project combines SaaS, Full-Stack development, AI, APIs, CRM, VoIP, CPaaS, Contact Center, e-commerce or cloud infrastructure, I can architect, develop, integrate and deploy the complete production system. 𝗪𝗛𝗔𝗧 𝗬𝗢𝗨 𝗖𝗔𝗡 𝗘𝗫𝗣𝗘𝗖𝗧 Clear architecture, practical technical decisions, clean APIs, maintainable code and production-ready deployment not just a prototype. I can join at any stage: idea/MVP, architecture, existing codebase, feature development, system integration, performance optimization or production troubleshooting. 𝗟𝗘𝗧’𝗦 𝗕𝗨𝗜𝗟𝗗 Have an existing system that needs improvement, or a product that needs to be built from scratch? Share your requirements, current architecture/codebase and goals. I can identify the right architect