Senior Frontend Engineer

SiftHub; Mumbai; On-site; INR 3,600,000 - 6,000,000; Full time

Benefits offered by this job

Health insurance

ESOPs

In-office in Mumbai

Job summary

SiftHub is building an Agentic Platform to streamline sales collateral, deal briefs, RFPs, and post-meeting follow-ups with agents across web, Chrome extension, Office add-in, and Google Sheets add-on. We seek a senior frontend engineer to own architecture, performance, and cross-surface consistency.

You will drive modern frontend practices, shape component systems, and collaborate with NLP and backend teams to deliver fast, accessible interfaces.

Qualifications

• 4+ years of production experience with React and TypeScript.
• Strong command of modern frontend stack: Redux/Zustand, Webpack/Vite, and testing.
• Ability to reason about design trade-offs and ensure high-quality UI.
• Hands-on performance profiling and production optimization.
• Willingness to contribute tests as part of development.
• Experience with Chrome extension or Office/Sheets integrations is a bonus.

Responsibilities

• Own Chrome extension, Office add-in, Sheets add-on, and React/TypeScript web app architecture and performance.
• Develop component systems and design token infrastructure.
• Improve frontend performance: load times, rendering, memory, and extension lifecycle.
• Integrate AI outputs into clean, responsive UIs with NLP/backend engineers.
• Maintain frontend quality through reviews, patterns, and standards.

Skills

React

TypeScript

Redux

Zustand

Webpack

Vite

Jest/Vitest

React Testing Library

Playwright

Frontend architecture

Tools

Chrome extension internals

Office.js / Google Sheets API

AWS

CI/CD (GitHub Actions)

Job description

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
• 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.