Tahir M.

I build production AI voice agents that answer calls, qualify leads, book appointments, follow up with customers, and connect directly to your existing CRM and business software. I also help companies fix voice agents that are slow, unreliable, expensive, or struggling to handle real conversations. Top Rated Plus · 100% Job Success · 2,800+ Upwork Hours WHO I HELP Startups and teams building voice AI products I build production voice systems professionally, not just demos. That includes real-time audio streaming, SIP/WebRTC, low-latency conversations, interruption handling, call routing, human handoffs, and backend infrastructure that holds up under high call volume. Whether you're building a voice AI platform, outbound dialer, contact center, or adding voice capabilities to an existing product, I can help design, build, and scale it. Companies with voice agents that aren't performing Already using Retell, Vapi, Twilio, LiveKit, or a custom voice stack? If your agent responds too slowly, interrupts callers, sounds unnatural, drops calls, or costs too much per minute, I can investigate the bottlenecks and implement improvements. I focus on measurable results: response latency, call reliability, conversation quality, and operating costs. Sales teams and agencies I build AI calling and follow-up systems that respond to new leads quickly, qualify prospects, schedule appointments, and automatically log conversations and outcomes to your CRM. These systems can integrate with your existing sales workflows, calendars, and business tools, so your team spends less time on manual follow-up. Businesses that need an AI receptionist Missed calls can mean missed customers. I build AI receptionists that answer 24/7, handle common questions, book appointments, collect customer information, and transfer urgent or complicated calls to a real person. You don't need to replace your existing software. I can connect the agent to your CRM, calendar, phone system, and other tools. And not every project needs a custom solution. If an existing platform can solve your problem faster and for less money, I'll tell you. VOICE AI ENGINEERING I work across the entire voice AI stack, from the phone call itself to the software and infrastructure behind it. Voice agents: Inbound/outbound calling, appointment booking, lead qualification, conversational workflows, and human handoffs. Real-time infrastructure: SIP, WebRTC, streaming audio, WebSockets, interruption handling, latency optimization, and call orchestration. AI integrations: Speech-to-text, text-to-speech, LLMs, tool calling, conversational memory, and external API integrations. Production reliability: Monitoring, debugging, concurrency, performance optimization, and infrastructure scaling. Business integrations: CRMs, calendars, payments, webhooks, databases, and custom backend services. I work with technologies including Twilio, Telnyx, LiveKit, Node.js, TypeScript, Python, Go, PostgreSQL, and AWS. FULL-STACK SOFTWARE DEVELOPMENT Voice AI is my specialty, but I also build the software around it. I've developed complete SaaS platforms, MVPs, marketplaces, customer portals, internal tools, dashboards, and custom business applications. As co-founder and CTO, I built a two-sided booking marketplace from scratch, including scheduling, messaging, Stripe payments, and administrative tools. The platform grew to 500+ clients and 70+ service providers. Whether you need an entire product or a developer to extend an existing system, I can handle the frontend, backend, database, integrations, and deployment. RESULTS FROM PAST WORK Built software integrations that generated $600K+ in revenue. Launched a real-time AI assistant that improved support team efficiency by approximately 20%. Reduced cloud infrastructure costs by over $10K per month through engineering and infrastructure improvements. Built and launched a marketplace serving 500+ clients and 70+ service providers. HOW I WORK You work directly with me from planning through launch. No middlemen or outsourced development teams. I keep projects organized with clear milestones, regular progress updates, and working demos so you can see what's being built. You'll own your code, infrastructure, and accounts. I also document what I build so your team can maintain and extend it after handoff. Have a voice AI project in mind, or an existing system that needs improvement? Send me a message describing what you're building, what's not working, or what your team currently handles manually. I'll share how I'd approach it and a rough scope.