Senior Frontend Developer

SiftHub; Mumbai; On-site; INR 2,500,000 - 4,000,000; Full time

Benefits offered by this job

Health insurance

ESOPs

In-office Mumbai

Competitive salary

Dev tools

Job summary

SiftHub is seeking a senior frontend engineer to own the Chrome extension, Office add-in, Sheets add-on and the React/TypeScript web app from architecture to performance. You will build component systems and design token infrastructure, optimize frontend performance, and integrate AI outputs into clean, responsive UIs while collaborating with NLP and backend engineers.

The role emphasizes a strong frontend quality bar, and requires clear communication with designers, PMs, and engineers.

Qualifications

• 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.

Responsibilities

• 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.

Skills

React

TypeScript

Redux

Zustand

Webpack

Vite

Jest

Playwright

React Testing Library

Performance profiling

UI design

Accessibility

Tools

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.