About Us At Xtnsion.AI , we’re reimagining how businesses interact, support, and operate—using intelligent AI agents that don’t just chat, but actually work . Our platform automates lead capture, support triage, appointment scheduling, intelligent follow-ups and much more via voice and chat interfaces deeply integrated into real-world workflows. We blend LLMs, memory systems, STT/TTS, and third-party tool integrations to create scalable, outcome-driven AI workflows. About the Role We’re hiring our Founding AI Engineer to help design, build, and scale intelligent, agentic AI systems that operate autonomously across voice and chat. You’ll lead development across reasoning flows, memory systems, tool execution , and API integrations — building the foundation of our AI platform from the ground up. You’ll work directly with the founder in a fast-moving, zero-to-one environment where you’ll have a real say in what we build and how we build it. This role is ideal for someone who thrives in early-stage chaos, loves autonomy, and is excited to evolve into a lead or founding engineering role as the company grows. Key Responsibilities Architect and build Agentic AI systems that reason, act, and respond autonomously across multi-step workflows Develop multi-modal conversational agents that integrate voice (STT/TTS) and chat interfaces Design end-to-end flows with contextual awareness and persistent memory Integrate deeply with external and internal systems — including CRMs, scheduling platforms, helpdesks, and databases — via robust API orchestration Implement fallback logic, reasoning chains, and real-time observability to ensure stability and adaptability Rapidly prototype, test, and iterate on AI-powered workflows based on real-world user feedback Collaborate closely with the founder on system architecture, product roadmap, and technical direction Required Skills & Qualifications 3–4+ years of full-stack engineering experience , with strong backend skills in Python or Node.js/TypeScript and comfort working across the frontend stack. Hands-on experience working with LLM APIs and structured prompt engineering Experience with agentic AI frameworks or multi-agent orchestration logic Prior work on conversational or voice-based applications (e.g., IVRs, voicebots, chat assistants) Proven ability to integrate with third-party APIs such as CRMs, scheduling tools, and support platforms Bonus: Built or contributed to voicebots, IVRs, or real-world agent-based systems Familiarity with voice technologies Experience working in a startup or early-stage product environment Why You'll thrive at Xtnsion.AI Develop intelligent systems that act , not just converse Take end-to-end ownership with fast iteration and zero micromanagement Collaborate directly with the founder on product and technical vision Grow into a leadership role as we scale and expand the engineering team Enjoy a remote-first culture with flexible hours and a foundation of trust Work on problems that deliver real business impact for global clients