Senior Frontend Developer

SiftHub is an Agentic Platform for Deal Orchestration. We deploy agents to automate sales collateral, deal briefs, RFPs, and post-meeting follow-ups; unblocking deals for sales and solutions teams.SiftHub collates and sifts through your ecosystem (Drive, Gong, CRM, Slack, and more) to identify and convert real-time deal signals into tailored content and ready-to-execute actions. Designed to replicate how top-performing reps execute deals. Trusted by revenue teams at Saviynt, Allego, Superhuman, Sirion and more. Why This Role Exists SiftHub reaches users across multiple surfaces: a web app, a Chrome extension that surfaces AI intelligence mid-call and mid-workflow, a Microsoft Office add-in, and a Google Sheets add-on. The frontend experience is the product. We need a senior engineer who can own it across all of these: architecture, performance, and the bar enterprise users will hold us to. What You’ll Own The Chrome extension, Office add-in, Sheets add-on, and React/TypeScript web app: architecture, performance, reliability, and cross-surface consistency Component systems and design token infrastructure the team builds on Frontend performance: load times, rendering, memory, and extension lifecycle Integrating AI outputs into clean, responsive UIs, working closely with NLP and backend engineers The frontend quality bar: code reviews, patterns, and technical standards Must-have 4+ years of production experience with React and TypeScript Strong command of the modern frontend stack: state management (Redux, Zustand, or similar), Webpack or Vite, and testing with Jest/Vitest, React Testing Library, or Playwright Deep experience with at least one non-web surface (browser extensions, Office add-ins, or Google Workspace add-ins), including its platform constraints, lifecycle, and edge cases Strong opinions on component design and state management, with the ability to reason about trade-offs, not just implement Hands-on performance profiling and optimization in production Writes tests as part of development, not as an afterthought Builds clean, accessible, maintainable interfaces and can clearly articulate design decisions Good to have Chrome extension internals: content scripts, service workers, and messaging patterns Office.js or Google Sheets API experience AWS and CI/CD (e.g. GitHub Actions) B2B SaaS experience and a feel for enterprise UI expectations Exposure to AI or LLM-powered product surfaces, especially streaming output Who You Are You care about the last 5%: micro-interactions, edge cases, and polish You push back on UX decisions when something feels off, and have the design intuition to back it up You’re energised by early-stage ambiguity and can build a path where there isn’t one You communicate clearly with designers, PMs, and backend engineers What We Offer Hard UX problems: making AI output feel fast and trustworthy inside the tools people already use Direct access to the founder Competitive salary plus ESOPs Best-in-class dev tools and AI assistants Health insurance In-office in Mumbai, 5 days a week. We value building together in person.