The Mission Superfone is India’s first DOT-licensed AI Telecom Operator. We own the full stack including mobile numbers and VoIP infrastructure and pair them with AI agents, WhatsApp APIs, CRMs, and more.  Superfone allows these businesses to work as a team on a single phone number to manage both calls and WhatsApp. Our AI agents such as AI Receptionists, AI Sales Agents and others help businesses drive actual sales while working seamlessly alongside their human teams. We serve thousands of SMBs handling over 10 million calls monthly and are backed by Ankur Capital and YourNest. The Culture (Read this carefully) We are early-stage, high-velocity, and high-stakes. We value Extreme Ownership & High Impact. If you’re looking for "work-life balance" in the traditional sense, this isn't for you. If you’re looking to build the most impactful thing in your career alongside an elite team, keep reading. What You’ll Actually Do - This is a backend engineering role focused on building distributed systems, with involvement in AI-powered features.  - Design, build, and improve backend systems that handle real business workflows, such as calls, CRM interactions, and WhatsApp follow-ups - Develop backend services and APIs using Node.js to support core product features - Build and scale our core communication infrastructure, including telephony, messaging, and complex workflows - Design robust, forward-looking systems that can handle massive traffic while remaining flexible. - Contribute to AI Agents and AI-first features by working on a full-stack approach to launching or improving features - Help set up observability — track where calls go wrong, where agents hallucinate, where latency spikes Who You Are - You’re comfortable with Node.js; experience with Go is a plus.  - Strong programming fundamentals and the ability to write clean, reliable code - You've worked with LLMs, AI-first framework or tools, and built real applications (more than a happy case demo). - You don't wait to be unblocked — when something isn't documented, you dig in, try things, and figure it out - You've built something end-to-end and shipped it — a working project that real users touched. - Focused on building systems that work reliably for real users, not just passing tests  - If you've played with RAG or vector databases, that's a bonus Why Superfone? - The Moat: We are a licensed operator. We have the "pipes" that others can't touch. - The Pedigree: Work directly with founders who helped build Flipkart and PhonePe. - The Upside: Competitive stipend, Great work, good people, and a chance to expand your skillset. - Zero BS: No layers of management. You build, you ship, you see the impact immediately. Role Details: - Duration: 6 months - Work model: In-office, Bangalore - Location: Sector 3, HSR Layout, Bangalore, Karnataka Address  - Working days:  Monday to Saturday (Saturday is WFH) 