Posted Jul 12, 2026

Founding (Senior) Frontend Engineer

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Bujo AI (YC X26) builds conversational AI agents for sales and customer support at large B2C enterprises. We work with multiple Fortune 500 companies and are funded by Y Combinator. We are profitable and fast-growing. Based in San Francisco, USA. Founded by Nalin Gupta -2x YC founder, one exit in self-driving cars, Forbes 30 Under 30, IIT Kharagpur alum. The role This is a founding frontend role. You will own the product UI and frontend architecture end-to-end, shipping a high-performance, real-time web app used by enterprise customers. You will work closely with the founder and backend/AI team. • Compensation: Rs. 40 – 60 lakh/year • Heavy equity (founding role, YC-backed) • Fully remote (India-based) What you’ll build • A production-grade web app in Next.js + React + TypeScript. • Real-time interfaces using WebSockets for live sync and event-driven UI. • Audio and voice workflows: browser-based voice capture, audio streaming, live transcription UI. • Polished UI: responsive layouts, accessibility, and high-quality CSS + animations (micro-interactions, motion). • Performance and caching: SSR/SSG/ISR, caching strategy, efficient rendering, code splitting, CDN patterns. • Robust state and sync: Redux / Zustand / Jotai, offline-first or local-first patterns, IndexedDB. • Deep browser integrations: Web Audio API, MediaRecorder, Service Workers, PWA capabilities. • Production observability: error tracking, performance monitoring, real-user metrics, and feature instrumentation. Responsibilities • Ship features weekly with high quality and strong UX polish. • Design and maintain a scalable frontend architecture (performance, caching, state, data flow). • Build reliable real-time experiences (connection lifecycle, retries, latency handling). • Own frontend quality: testing strategy where needed, monitoring, debugging, and incident response. • Collaborate tightly with the backend to define APIs, payloads, and reliability standards. Requirements • 4 to 5+ years of frontend engineering experience. • Strong skills in React, Next.js, TypeScript, and modern JavaScript. • Excellent CSS fundamentals and comfort with animations and UI polish. • Firm grasp of state management patterns and tradeoffs. • Solid understanding of caching and performance optimization. • Hands-on experience with WebSockets and real-time UI. • You have shipped a product used by 1,000+ customers/users in production. • Comfortable with fundamentals (including DSA) and writing clean, maintainable code. How to apply Please apply through YC portal along with your LinkedIn and GitHub profile, and A short note on the most complex frontend system you’ve built (real-time, performance, offline, or audio). Apply tot his job Apply To this Job