Aqeel Abbas
Every connection begins with a single request.
Scroll to trace the session — from INVITE to 200 OK.
A team needs telephony that actually works — carriers, call control, recordings, real-time voice. That's the INVITE. I'm the endpoint that answers: a VoIP & backend engineer who has built the whole path, from the SIP trunk to the product on top.
Provisional response received. Here's the toolkit I reach for while the session sets up.
Telephony
Backend
Voice / AI
Automation
Real-time media
RTP, recording and streaming audio pipelines.
Event-driven control
Calls driven by AMI/ARI events, not guesswork.
Low-latency voice AI
Speech in, speech out, fast enough to feel human.
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clients connected
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projects delivered
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years on voice & backend
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answered on first ring
Handshake complete — the media channel is open. Now the real payload flows. Here's the work I've shipped.
Six sessions I've built end-to-end — each one a real telephony or real-time voice system.
Telegram bot + VoIP billing engine
A Telegram bot that provisioned talk-time for callers based on crypto payments, then metered live calls against their balance in real time.
Integration & IVR flows
Automated outbound campaigns wiring a programmable voice API and FreePBX into Make.com — placing calls, collecting caller input, and persisting results.
Call media + speech pipeline
A recording pipeline that captured call audio and ran it through Google Cloud for text-to-speech prompts and speech-to-text transcription.
Full telephony platform
End-to-end platform: a SIP trunk on Asterisk/FreePBX, an Asterisk-Java backend driving calls over AMI/ARI, and a GUI for bulk campaigns.
Conversational voice agent
A low-latency voice agent that answered calls, understood spoken orders, and completed them in a natural back-and-forth conversation.
Real-time transcription service
A real-time transcription service that turned ongoing conversations into live, streaming text for agents and downstream systems.
Verified 5.0 rating across 19 sessions on Fiverr. Client handles are hidden by request.
“worked with a few times now and he’s great”
“was able to understand the request in one go, no need to explain anything in detail, was self understand on what the requirement was from the client, has good knowledge of VOIP and is ready to adjust as per the requirement of the client”
“Highly professional, sincere, and efficient. I wholeheartedly recommend their services.”
“Good communication with great professionalism”
If your product needs voice, telephony or real-time backends that hold up under real traffic, let's talk. I'll answer on the first ring.
Session terminated cleanly. Thanks for tracing the whole call. // EOF