@Den_Hub

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VoIP, SIP Trunk & WhatsApp Business API Expert

I help businesses build modern communication systems that connect voice calls, WhatsApp and AI.

VoIP & PBX: I set up and configure VoIP and cloud PBX systems (Asterisk, FreePBX, 3CX, VitalPBX), SIP trunks, IVR menus, call routing, call queues, extensions and call recording.

WhatsApp Business API: I integrate the WhatsApp Business API (Meta Cloud API, Twilio, 360dialog) for bulk and transactional messages, message templates, broadcasts and CRM/app integration. I also enable WhatsApp incoming and outgoing calls connected to your PBX or SIP trunk.

AI Automation: I build AI voice agents that answer and make calls like a human, and WhatsApp AI chatbots that handle customer support, sales and bookings 24/7.

Message me with your requirements and I will suggest the right solution for your business.

Portfolio

Built a complete web-based WhatsApp messaging platform (SaaS) where businesses can connect their WhatsApp devices and send bulk and transactional messages. Features include a dashboard, compose message with contact lists, reusable message templates, attachments and scheduled sending, message logs, WhatsApp device management, account recharge with per-message billing, and invoices.
Integrated the official WhatsApp Business API (Meta Cloud API) into a vehicle tracking company's system. Delivered live number monitoring, Meta-approved message templates with dynamic variables, automated bulk campaigns from Excel (1,138 messages sent with 0 failures), and a WhatsApp CRM shared inbox where the team handles customer chats and voice messages, alongside an auto-call module.
Delivered a complete VoIP business phone system for a client, including PBX setup, SIP trunk configuration, extensions, IVR menus, call routing and call queues. The system improved call handling, reduced telephony costs and was built to be reliable and scalable for the client's operations.

Built a complete web-based WhatsApp messaging platform (SaaS) where businesses can connect their WhatsApp devices and send bulk and transactional messages. Features include a dashboard, compose message with contact lists, reusable message templates, attachments and scheduled sending, message logs, WhatsApp device management, account recharge with per-message billing, and invoices.

Related service

1 / 6
Den_Hub

I will integrate WhatsApp Business API messaging with your website app or CRM

From $24.38

Integrated the official WhatsApp Business API (Meta Cloud API) into a vehicle tracking company's system. Delivered live number monitoring, Meta-approved message templates with dynamic variables, automated bulk campaigns from Excel (1,138 messages sent with 0 failures), and a WhatsApp CRM shared inbox where the team handles customer chats and voice messages, alongside an auto-call module.

Related service

1 / 5
Den_Hub

I will set up WhatsApp Business API calling with PBX for incoming and outgoing calls

From $30.48

Delivered a complete VoIP business phone system for a client, including PBX setup, SIP trunk configuration, extensions, IVR menus, call routing and call queues. The system improved call handling, reduced telephony costs and was built to be reliable and scalable for the client's operations.

Related service

1 / 4
Den_Hub

I will configure VoIP PBX system with SIP trunk, IVR and call routing

From $30.48

My services

Orders in progress 0

Total sales 0

Seller since Mar 2026

1 / 5
Den_Hub

I will set up WhatsApp Business API calling with PBX for incoming and outgoing calls

From $30.48
1 / 6
Den_Hub

I will integrate WhatsApp Business API messaging with your website app or CRM

From $24.38
1 / 4
Den_Hub

I will configure VoIP PBX system with SIP trunk, IVR and call routing

From $30.48
1 / 3
Den_Hub

I will build an AI voice agent and WhatsApp AI chatbot for your business

From $30.48
1 / 4
Den_Hub

I will set up and configure a SIP trunk for your VoIP PBX and call center

From $30.48

Skills

WhatsApp marketing
Chatbot
Api integration
Webhooks
Linux
Automated responses
Automated workflow
AI agent
CRM management
AI chatbot

Work experience

VoIP & Business Communication Systems Specialist The Access Group Ltd - Since Jun 2024
Set up and manage VoIP and PBX systems, SIP trunks, IVR and call routing for business communication. Integrate WhatsApp Business API, automated messaging and AI chatbots with business systems and CRMs.
WhatsApp Marketing & Lead Generation Specialist Digital Nexa - Feb 2021 - Mar 2024
Ran WhatsApp bulk messaging and broadcast campaigns, automated replies and lead generation funnels. Managed customer messaging workflows and CRM lead follow-ups for clients.

Degrees and certifications

Master of computer science university of Hertfordshire ‐ Sep 2021