Senior AI Engineer

2 days ago

India Xtnsion.AI Full time

About Us Xtnsion.AI is building the agentic CX layer for modern businesses — AI voice + chat agents that autonomously handle bookings, lead follow-up, support workflows, CRM actions, and more across phone, WhatsApp, SMS, email, and web chat. Our agents understand intent, retrieve context, take actions, and close loops — not just respond. We’re growing fast across healthcare, clinics, D2C, and global SMBs, and we’re hiring a senior builder to help architect our core platform from the ground up. About the Role We’re looking for a Senior AI Engineer (Founding Team) who loves building 0→1 products, thrives in chaos, and wants to work directly with the founder to architect and ship real agentic AI systems. You’ll design and build: Real-time voice + chat agents Agentic reasoning and workflows Memory + state management Deep API integrations (CRM, scheduling, support tools) Scalable backend + infra for AI systems This is a high-ownership, high-autonomy, zero-bureaucracy role. What You’ll Own Architect the agentic workflow engine (reasoning, memory, tool use) Build real-time voice + chat agents using STT/TTS + LLMs Create deep integrations with CRMs, schedulers, helpdesks, databases Design scalable backend + infra for multi-channel agents Prototype fast, ship fast, and iterate with real customer feedback Work directly with the founder on product + architecture Lay the engineering foundation for the next 6–12 months of growth What You Bring 4–7+ years of engineering experience Strong backend fundamentals (Python preferred) Deep understanding of full-stack system design — backend services, SQL data modeling, and production-grade Python engineering Expert-level understanding of APIs — requests, auth flows, webhook systems, rate limits, and complex third-party integrations Hands-on with LLM APIs, LangChain/LangGraph, agent orchestration Strong grasp of Generative AI fundamentals — RAG, embeddings, retrieval design, structured outputs, and tool-using agents Experience deploying and maintaining production systems — Docker, servers, environment management, and dev/stage/prod setups Architectural intuition around scalable systems — queues/workers, caching, load balancing, service boundaries, and latency-aware design Experience with chat/voice systems or workflow automation Comfortable using AI-augmented developer tools (Cursor, ChatGPT, Gemini, Claude) to accelerate prototyping and development Comfortable integrating complex APIs Thrive in zero-to-one environments, ambiguity, and high ownership Why You’ll Love This Direct collaboration with the founder Massive ownership and zero bureaucracy Build systems that thousands will interact with daily Remote-first, flexible, output-driven culture Path to Lead Engineer / Head of Engineering If you’re a builder, problem-solver, and 0→1 engineer, let’s talk.

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